./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.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/safe028_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe028_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_rmo.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-7724a2d-m [2024-06-28 00:36:57,596 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:36:57,677 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:36:57,684 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:36:57,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:36:57,715 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:36:57,716 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:36:57,716 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:36:57,717 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:36:57,721 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:36:57,721 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:36:57,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:36:57,723 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:36:57,724 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:36:57,724 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:36:57,724 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:36:57,725 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:36:57,725 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:36:57,725 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:36:57,725 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:36:57,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:36:57,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:36:57,726 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:36:57,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:36:57,727 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:36:57,727 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:36:57,727 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:36:57,728 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:36:57,728 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:36:57,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:36:57,729 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:36:57,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:36:57,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:36:57,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:36:57,730 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:36:57,730 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:36:57,730 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:36:57,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:36:57,731 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:36:57,731 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:36:57,731 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:36:57,731 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:36:57,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:36:57,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:36:57,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:36:57,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:36:57,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:36:57,983 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:36:57,983 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:36:57,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-28 00:36:59,200 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:36:59,447 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:36:59,447 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-28 00:36:59,461 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8d6ab64/dc39523c3eb04dd6a0951397da1d2ec8/FLAG425d5b7b5 [2024-06-28 00:36:59,478 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8d6ab64/dc39523c3eb04dd6a0951397da1d2ec8 [2024-06-28 00:36:59,480 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:36:59,480 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:36:59,481 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_rmo.yml/witness.yml [2024-06-28 00:36:59,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:36:59,568 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:36:59,569 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:36:59,569 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:36:59,574 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:36:59,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:36:59" (1/2) ... [2024-06-28 00:36:59,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795315fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:36:59, skipping insertion in model container [2024-06-28 00:36:59,576 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:36:59" (1/2) ... [2024-06-28 00:36:59,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f0ed8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:36:59, skipping insertion in model container [2024-06-28 00:36:59,578 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:36:59" (2/2) ... [2024-06-28 00:36:59,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795315fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:59, skipping insertion in model container [2024-06-28 00:36:59,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:36:59" (2/2) ... [2024-06-28 00:36:59,581 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:36:59,612 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:36:59,613 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:36:59,613 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:36:59,614 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:36:59,614 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:36:59,614 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-28 00:36:59,662 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:37:00,061 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:37:00,071 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:37:00,242 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:37:00,278 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:37:00,278 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00 WrapperNode [2024-06-28 00:37:00,278 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:37:00,279 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:37:00,279 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:37:00,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:37:00,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,366 INFO L138 Inliner]: procedures = 175, calls = 73, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 163 [2024-06-28 00:37:00,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:37:00,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:37:00,367 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:37:00,367 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:37:00,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,385 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,421 INFO L175 MemorySlicer]: Split 32 memory accesses to 2 slices as follows [2, 30]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-28 00:37:00,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,438 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,440 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,443 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,453 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:37:00,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:37:00,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:37:00,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:37:00,455 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (1/1) ... [2024-06-28 00:37:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:37:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:37:00,493 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) [2024-06-28 00:37:00,508 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 [2024-06-28 00:37:00,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:37:00,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:37:00,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:37:00,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:37:00,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:37:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:37:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:37:00,545 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:37:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:37:00,545 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:37:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:37:00,546 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:37:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:37:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:37:00,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:37:00,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:37:00,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:37:00,550 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:37:00,730 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:37:00,733 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:37:01,388 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:37:01,389 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:37:01,775 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:37:01,775 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:37:01,776 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:37:01 BoogieIcfgContainer [2024-06-28 00:37:01,776 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:37:01,778 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:37:01,778 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:37:01,781 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:37:01,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:36:59" (1/4) ... [2024-06-28 00:37:01,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be6113a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:37:01, skipping insertion in model container [2024-06-28 00:37:01,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:36:59" (2/4) ... [2024-06-28 00:37:01,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be6113a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:37:01, skipping insertion in model container [2024-06-28 00:37:01,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:37:00" (3/4) ... [2024-06-28 00:37:01,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be6113a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:37:01, skipping insertion in model container [2024-06-28 00:37:01,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:37:01" (4/4) ... [2024-06-28 00:37:01,784 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_rmo.i [2024-06-28 00:37:01,801 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:37:01,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:37:01,802 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:37:01,864 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:37:01,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:37:01,949 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 00:37:01,949 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:37:01,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:37:01,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:37:01,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 00:37:01,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:37:01,969 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;@5241b220, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:37:01,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:37:01,974 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:37:01,974 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 00:37:01,974 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:37:01,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:01,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:37:01,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:01,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash 673374852, now seen corresponding path program 1 times [2024-06-28 00:37:01,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:01,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643537706] [2024-06-28 00:37:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:01,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:04,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:04,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643537706] [2024-06-28 00:37:04,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643537706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:04,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:04,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:37:04,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004195100] [2024-06-28 00:37:04,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:04,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:37:04,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:04,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:37:04,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:37:04,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:37:04,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:04,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:04,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:37:04,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:05,076 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-28 00:37:05,077 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 00:37:05,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7678 event pairs, 650 based on Foata normal form. 1/1556 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-28 00:37:05,093 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 00:37:05,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-28 00:37:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:37:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:37:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-28 00:37:05,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-28 00:37:05,107 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-28 00:37:05,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-28 00:37:05,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:37:05,115 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 00:37:05,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 00:37:05,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 00:37:05,121 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 00:37:05,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:05,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:05,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:05,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:37:05,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:05,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1426790781, now seen corresponding path program 1 times [2024-06-28 00:37:05,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:05,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381733539] [2024-06-28 00:37:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:05,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:07,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381733539] [2024-06-28 00:37:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381733539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:07,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:37:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505316996] [2024-06-28 00:37:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:07,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:37:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:37:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:37:07,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:37:07,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:07,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:07,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:37:07,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:07,635 INFO L124 PetriNetUnfolderBase]: 1154/1773 cut-off events. [2024-06-28 00:37:07,635 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-28 00:37:07,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4082 conditions, 1773 events. 1154/1773 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8315 event pairs, 649 based on Foata normal form. 3/1773 useless extension candidates. Maximal degree in co-relation 4070. Up to 1720 conditions per place. [2024-06-28 00:37:07,648 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-28 00:37:07,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 258 flow [2024-06-28 00:37:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:37:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:37:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-28 00:37:07,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:37:07,651 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 90 transitions. [2024-06-28 00:37:07,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 258 flow [2024-06-28 00:37:07,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:37:07,653 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 00:37:07,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 00:37:07,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 00:37:07,654 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 00:37:07,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:07,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:07,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:07,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:37:07,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:07,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1051332990, now seen corresponding path program 1 times [2024-06-28 00:37:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:07,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052643856] [2024-06-28 00:37:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:07,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:10,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:10,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052643856] [2024-06-28 00:37:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052643856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:10,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:10,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:37:10,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702229013] [2024-06-28 00:37:10,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:10,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:37:10,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:37:10,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:37:10,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:37:10,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:10,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:10,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:37:10,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:11,170 INFO L124 PetriNetUnfolderBase]: 1147/1764 cut-off events. [2024-06-28 00:37:11,170 INFO L125 PetriNetUnfolderBase]: For 991/991 co-relation queries the response was YES. [2024-06-28 00:37:11,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 1764 events. 1147/1764 cut-off events. For 991/991 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8290 event pairs, 519 based on Foata normal form. 4/1765 useless extension candidates. Maximal degree in co-relation 4522. Up to 1674 conditions per place. [2024-06-28 00:37:11,181 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-28 00:37:11,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 400 flow [2024-06-28 00:37:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:37:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:37:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-28 00:37:11,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-28 00:37:11,185 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 116 transitions. [2024-06-28 00:37:11,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 400 flow [2024-06-28 00:37:11,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:37:11,188 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 220 flow [2024-06-28 00:37:11,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-28 00:37:11,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-28 00:37:11,189 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 220 flow [2024-06-28 00:37:11,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:11,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:11,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:11,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:37:11,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:11,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1515405191, now seen corresponding path program 1 times [2024-06-28 00:37:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:11,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741050793] [2024-06-28 00:37:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:11,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:14,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741050793] [2024-06-28 00:37:14,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741050793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:14,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:14,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:14,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673539513] [2024-06-28 00:37:14,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:14,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:14,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:37:14,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:14,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:14,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:37:14,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:15,028 INFO L124 PetriNetUnfolderBase]: 1136/1747 cut-off events. [2024-06-28 00:37:15,029 INFO L125 PetriNetUnfolderBase]: For 2202/2202 co-relation queries the response was YES. [2024-06-28 00:37:15,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5211 conditions, 1747 events. 1136/1747 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8221 event pairs, 371 based on Foata normal form. 8/1752 useless extension candidates. Maximal degree in co-relation 5194. Up to 1607 conditions per place. [2024-06-28 00:37:15,044 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-28 00:37:15,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 492 flow [2024-06-28 00:37:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-28 00:37:15,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 00:37:15,050 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 220 flow. Second operand 6 states and 133 transitions. [2024-06-28 00:37:15,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 492 flow [2024-06-28 00:37:15,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:37:15,059 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 267 flow [2024-06-28 00:37:15,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-28 00:37:15,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-28 00:37:15,061 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 267 flow [2024-06-28 00:37:15,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:15,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:15,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:15,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:37:15,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:15,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash 923630510, now seen corresponding path program 1 times [2024-06-28 00:37:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228358203] [2024-06-28 00:37:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:17,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:17,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228358203] [2024-06-28 00:37:17,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228358203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:17,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:17,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:37:17,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653153320] [2024-06-28 00:37:17,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:17,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:37:17,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:37:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:37:17,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:37:17,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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) [2024-06-28 00:37:17,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:17,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:37:17,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:18,641 INFO L124 PetriNetUnfolderBase]: 1010/1620 cut-off events. [2024-06-28 00:37:18,642 INFO L125 PetriNetUnfolderBase]: For 3151/3160 co-relation queries the response was YES. [2024-06-28 00:37:18,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5207 conditions, 1620 events. 1010/1620 cut-off events. For 3151/3160 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7880 event pairs, 399 based on Foata normal form. 3/1616 useless extension candidates. Maximal degree in co-relation 5186. Up to 1487 conditions per place. [2024-06-28 00:37:18,656 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 49 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-06-28 00:37:18,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 485 flow [2024-06-28 00:37:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:37:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:37:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-28 00:37:18,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-28 00:37:18,660 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 267 flow. Second operand 5 states and 97 transitions. [2024-06-28 00:37:18,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 485 flow [2024-06-28 00:37:18,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 450 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:18,672 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 331 flow [2024-06-28 00:37:18,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-28 00:37:18,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 00:37:18,674 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 331 flow [2024-06-28 00:37:18,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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) [2024-06-28 00:37:18,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:18,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:18,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:37:18,675 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:18,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1403565212, now seen corresponding path program 1 times [2024-06-28 00:37:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951300816] [2024-06-28 00:37:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:22,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951300816] [2024-06-28 00:37:22,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951300816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:22,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:22,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268463920] [2024-06-28 00:37:22,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:22,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:22,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:22,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:22,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:22,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:22,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:23,343 INFO L124 PetriNetUnfolderBase]: 1126/1733 cut-off events. [2024-06-28 00:37:23,344 INFO L125 PetriNetUnfolderBase]: For 4138/4138 co-relation queries the response was YES. [2024-06-28 00:37:23,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6077 conditions, 1733 events. 1126/1733 cut-off events. For 4138/4138 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8064 event pairs, 450 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 6051. Up to 1676 conditions per place. [2024-06-28 00:37:23,358 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-28 00:37:23,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 493 flow [2024-06-28 00:37:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:37:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:37:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-28 00:37:23,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 00:37:23,361 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 331 flow. Second operand 5 states and 91 transitions. [2024-06-28 00:37:23,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 493 flow [2024-06-28 00:37:23,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 70 transitions, 489 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 00:37:23,369 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 363 flow [2024-06-28 00:37:23,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-06-28 00:37:23,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 00:37:23,373 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 363 flow [2024-06-28 00:37:23,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:23,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:23,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:23,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:37:23,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:23,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1449518769, now seen corresponding path program 1 times [2024-06-28 00:37:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:23,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983546381] [2024-06-28 00:37:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:26,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:26,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983546381] [2024-06-28 00:37:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983546381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:26,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:26,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803881592] [2024-06-28 00:37:26,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:26,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:26,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:26,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:26,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 363 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:26,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:26,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:26,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:27,539 INFO L124 PetriNetUnfolderBase]: 1190/1837 cut-off events. [2024-06-28 00:37:27,540 INFO L125 PetriNetUnfolderBase]: For 5438/5441 co-relation queries the response was YES. [2024-06-28 00:37:27,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6665 conditions, 1837 events. 1190/1837 cut-off events. For 5438/5441 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8581 event pairs, 436 based on Foata normal form. 4/1831 useless extension candidates. Maximal degree in co-relation 6634. Up to 1665 conditions per place. [2024-06-28 00:37:27,557 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-28 00:37:27,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 746 flow [2024-06-28 00:37:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-28 00:37:27,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-28 00:37:27,559 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 363 flow. Second operand 6 states and 118 transitions. [2024-06-28 00:37:27,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 746 flow [2024-06-28 00:37:27,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 729 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:37:27,568 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 519 flow [2024-06-28 00:37:27,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-28 00:37:27,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-28 00:37:27,569 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 519 flow [2024-06-28 00:37:27,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:27,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:27,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:37:27,570 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:27,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:27,570 INFO L85 PathProgramCache]: Analyzing trace with hash -561807729, now seen corresponding path program 2 times [2024-06-28 00:37:27,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:27,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856658061] [2024-06-28 00:37:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:27,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:30,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:30,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856658061] [2024-06-28 00:37:30,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856658061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:30,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:30,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495144686] [2024-06-28 00:37:30,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:30,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:30,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:30,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:30,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 519 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:30,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:30,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:30,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:31,191 INFO L124 PetriNetUnfolderBase]: 1185/1826 cut-off events. [2024-06-28 00:37:31,192 INFO L125 PetriNetUnfolderBase]: For 7381/7387 co-relation queries the response was YES. [2024-06-28 00:37:31,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7313 conditions, 1826 events. 1185/1826 cut-off events. For 7381/7387 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8515 event pairs, 437 based on Foata normal form. 6/1821 useless extension candidates. Maximal degree in co-relation 7278. Up to 1662 conditions per place. [2024-06-28 00:37:31,209 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 61 selfloop transitions, 33 changer transitions 0/99 dead transitions. [2024-06-28 00:37:31,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 99 transitions, 865 flow [2024-06-28 00:37:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 00:37:31,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:37:31,211 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 519 flow. Second operand 6 states and 114 transitions. [2024-06-28 00:37:31,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 99 transitions, 865 flow [2024-06-28 00:37:31,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 849 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-28 00:37:31,224 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 631 flow [2024-06-28 00:37:31,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=631, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-28 00:37:31,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-28 00:37:31,225 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 631 flow [2024-06-28 00:37:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:31,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:31,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:31,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:37:31,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:31,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2045444657, now seen corresponding path program 3 times [2024-06-28 00:37:31,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:31,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041983970] [2024-06-28 00:37:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:33,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:33,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041983970] [2024-06-28 00:37:33,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041983970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:33,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:33,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123149744] [2024-06-28 00:37:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:33,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:33,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:33,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 631 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:33,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:33,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:33,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:34,265 INFO L124 PetriNetUnfolderBase]: 1228/1897 cut-off events. [2024-06-28 00:37:34,265 INFO L125 PetriNetUnfolderBase]: For 9380/9386 co-relation queries the response was YES. [2024-06-28 00:37:34,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7968 conditions, 1897 events. 1228/1897 cut-off events. For 9380/9386 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8883 event pairs, 429 based on Foata normal form. 6/1898 useless extension candidates. Maximal degree in co-relation 7928. Up to 1696 conditions per place. [2024-06-28 00:37:34,279 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 43 changer transitions 0/124 dead transitions. [2024-06-28 00:37:34,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1164 flow [2024-06-28 00:37:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-28 00:37:34,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-28 00:37:34,281 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 631 flow. Second operand 6 states and 129 transitions. [2024-06-28 00:37:34,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1164 flow [2024-06-28 00:37:34,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1128 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-28 00:37:34,294 INFO L231 Difference]: Finished difference. Result has 82 places, 91 transitions, 871 flow [2024-06-28 00:37:34,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=871, PETRI_PLACES=82, PETRI_TRANSITIONS=91} [2024-06-28 00:37:34,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 00:37:34,295 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 91 transitions, 871 flow [2024-06-28 00:37:34,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:34,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:34,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:34,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:37:34,295 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:34,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:34,296 INFO L85 PathProgramCache]: Analyzing trace with hash -561798801, now seen corresponding path program 1 times [2024-06-28 00:37:34,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:34,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61491698] [2024-06-28 00:37:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:34,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:38,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:38,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61491698] [2024-06-28 00:37:38,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61491698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:38,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:38,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:38,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244075939] [2024-06-28 00:37:38,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:38,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:38,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:38,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:38,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:38,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 91 transitions, 871 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:38,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:38,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:38,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:39,161 INFO L124 PetriNetUnfolderBase]: 1220/1885 cut-off events. [2024-06-28 00:37:39,161 INFO L125 PetriNetUnfolderBase]: For 11186/11186 co-relation queries the response was YES. [2024-06-28 00:37:39,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8358 conditions, 1885 events. 1220/1885 cut-off events. For 11186/11186 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8802 event pairs, 415 based on Foata normal form. 4/1886 useless extension candidates. Maximal degree in co-relation 8314. Up to 1791 conditions per place. [2024-06-28 00:37:39,174 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-28 00:37:39,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 1155 flow [2024-06-28 00:37:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 00:37:39,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 00:37:39,176 INFO L175 Difference]: Start difference. First operand has 82 places, 91 transitions, 871 flow. Second operand 7 states and 115 transitions. [2024-06-28 00:37:39,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 1155 flow [2024-06-28 00:37:39,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 1084 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:39,192 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 857 flow [2024-06-28 00:37:39,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=857, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-28 00:37:39,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 00:37:39,193 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 857 flow [2024-06-28 00:37:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:39,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:39,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:39,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:37:39,194 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:39,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2110257797, now seen corresponding path program 1 times [2024-06-28 00:37:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:39,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892705446] [2024-06-28 00:37:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892705446] [2024-06-28 00:37:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892705446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:42,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153325922] [2024-06-28 00:37:42,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:42,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:42,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:42,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 857 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:42,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:42,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:43,949 INFO L124 PetriNetUnfolderBase]: 1242/1917 cut-off events. [2024-06-28 00:37:43,949 INFO L125 PetriNetUnfolderBase]: For 13188/13197 co-relation queries the response was YES. [2024-06-28 00:37:43,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8704 conditions, 1917 events. 1242/1917 cut-off events. For 13188/13197 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8979 event pairs, 439 based on Foata normal form. 7/1915 useless extension candidates. Maximal degree in co-relation 8660. Up to 1708 conditions per place. [2024-06-28 00:37:43,966 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 70 selfloop transitions, 47 changer transitions 0/122 dead transitions. [2024-06-28 00:37:43,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 122 transitions, 1303 flow [2024-06-28 00:37:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 00:37:43,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-28 00:37:43,968 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 857 flow. Second operand 6 states and 119 transitions. [2024-06-28 00:37:43,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 122 transitions, 1303 flow [2024-06-28 00:37:43,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 1256 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:43,983 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 994 flow [2024-06-28 00:37:43,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=994, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-28 00:37:43,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-28 00:37:43,984 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 994 flow [2024-06-28 00:37:43,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:43,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:43,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:43,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:37:43,985 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:43,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash -236169245, now seen corresponding path program 2 times [2024-06-28 00:37:43,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:43,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128451395] [2024-06-28 00:37:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:43,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:47,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:47,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128451395] [2024-06-28 00:37:47,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128451395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:47,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:47,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:47,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555417560] [2024-06-28 00:37:47,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:47,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:47,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:47,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:47,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:47,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:47,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 994 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:47,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:47,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:47,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:48,387 INFO L124 PetriNetUnfolderBase]: 1234/1899 cut-off events. [2024-06-28 00:37:48,388 INFO L125 PetriNetUnfolderBase]: For 14690/14690 co-relation queries the response was YES. [2024-06-28 00:37:48,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8864 conditions, 1899 events. 1234/1899 cut-off events. For 14690/14690 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8808 event pairs, 421 based on Foata normal form. 3/1893 useless extension candidates. Maximal degree in co-relation 8819. Up to 1700 conditions per place. [2024-06-28 00:37:48,404 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 48 changer transitions 0/120 dead transitions. [2024-06-28 00:37:48,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1330 flow [2024-06-28 00:37:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-28 00:37:48,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-28 00:37:48,406 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 994 flow. Second operand 6 states and 113 transitions. [2024-06-28 00:37:48,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1330 flow [2024-06-28 00:37:48,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 120 transitions, 1247 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:37:48,425 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 1025 flow [2024-06-28 00:37:48,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1025, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-28 00:37:48,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 00:37:48,426 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 1025 flow [2024-06-28 00:37:48,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:48,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:48,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:48,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:37:48,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:48,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1015726243, now seen corresponding path program 3 times [2024-06-28 00:37:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:48,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105587275] [2024-06-28 00:37:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:48,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:51,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:51,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105587275] [2024-06-28 00:37:51,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105587275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:51,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:51,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:51,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385949817] [2024-06-28 00:37:51,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:51,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:51,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:51,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:51,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 1025 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:51,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:51,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:51,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:52,370 INFO L124 PetriNetUnfolderBase]: 1238/1912 cut-off events. [2024-06-28 00:37:52,370 INFO L125 PetriNetUnfolderBase]: For 16840/16846 co-relation queries the response was YES. [2024-06-28 00:37:52,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9086 conditions, 1912 events. 1238/1912 cut-off events. For 16840/16846 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8922 event pairs, 420 based on Foata normal form. 6/1913 useless extension candidates. Maximal degree in co-relation 9038. Up to 1705 conditions per place. [2024-06-28 00:37:52,386 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 51 changer transitions 0/131 dead transitions. [2024-06-28 00:37:52,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 1411 flow [2024-06-28 00:37:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 00:37:52,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-28 00:37:52,390 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 1025 flow. Second operand 7 states and 134 transitions. [2024-06-28 00:37:52,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 1411 flow [2024-06-28 00:37:52,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 1332 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:37:52,409 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 1104 flow [2024-06-28 00:37:52,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1104, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2024-06-28 00:37:52,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-28 00:37:52,410 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 1104 flow [2024-06-28 00:37:52,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:52,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:52,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:52,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:37:52,411 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:52,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1121875440, now seen corresponding path program 1 times [2024-06-28 00:37:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:52,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766485917] [2024-06-28 00:37:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:52,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:56,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:56,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766485917] [2024-06-28 00:37:56,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766485917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:56,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:56,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:56,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121876733] [2024-06-28 00:37:56,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:56,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:56,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:56,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:56,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 102 transitions, 1104 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:56,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:56,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:56,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:57,462 INFO L124 PetriNetUnfolderBase]: 1308/2021 cut-off events. [2024-06-28 00:37:57,462 INFO L125 PetriNetUnfolderBase]: For 17883/17883 co-relation queries the response was YES. [2024-06-28 00:37:57,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 2021 events. 1308/2021 cut-off events. For 17883/17883 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9643 event pairs, 355 based on Foata normal form. 6/2018 useless extension candidates. Maximal degree in co-relation 9482. Up to 1838 conditions per place. [2024-06-28 00:37:57,477 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 110 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-06-28 00:37:57,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 1630 flow [2024-06-28 00:37:57,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 00:37:57,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 00:37:57,479 INFO L175 Difference]: Start difference. First operand has 93 places, 102 transitions, 1104 flow. Second operand 8 states and 145 transitions. [2024-06-28 00:37:57,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 1630 flow [2024-06-28 00:37:57,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 146 transitions, 1557 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:57,501 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 1209 flow [2024-06-28 00:37:57,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1209, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-28 00:37:57,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-28 00:37:57,502 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 1209 flow [2024-06-28 00:37:57,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:57,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:57,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:57,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:37:57,502 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:57,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1117113840, now seen corresponding path program 2 times [2024-06-28 00:37:57,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:57,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92184104] [2024-06-28 00:37:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:57,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92184104] [2024-06-28 00:38:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92184104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:00,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:00,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396360745] [2024-06-28 00:38:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:00,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:00,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:00,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:00,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:00,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:00,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:00,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:00,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:02,115 INFO L124 PetriNetUnfolderBase]: 1448/2236 cut-off events. [2024-06-28 00:38:02,116 INFO L125 PetriNetUnfolderBase]: For 22023/22032 co-relation queries the response was YES. [2024-06-28 00:38:02,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11057 conditions, 2236 events. 1448/2236 cut-off events. For 22023/22032 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11033 event pairs, 395 based on Foata normal form. 10/2234 useless extension candidates. Maximal degree in co-relation 11006. Up to 1644 conditions per place. [2024-06-28 00:38:02,130 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 51 changer transitions 0/168 dead transitions. [2024-06-28 00:38:02,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 168 transitions, 1940 flow [2024-06-28 00:38:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 00:38:02,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-28 00:38:02,132 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 1209 flow. Second operand 7 states and 145 transitions. [2024-06-28 00:38:02,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 168 transitions, 1940 flow [2024-06-28 00:38:02,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 168 transitions, 1865 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:02,162 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 1397 flow [2024-06-28 00:38:02,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1397, PETRI_PLACES=105, PETRI_TRANSITIONS=128} [2024-06-28 00:38:02,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-28 00:38:02,164 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 1397 flow [2024-06-28 00:38:02,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:02,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:02,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:02,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:38:02,165 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:02,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1418095634, now seen corresponding path program 1 times [2024-06-28 00:38:02,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:02,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250174934] [2024-06-28 00:38:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:02,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:05,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:05,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250174934] [2024-06-28 00:38:05,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250174934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:05,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:05,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:05,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35223605] [2024-06-28 00:38:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:05,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:05,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 128 transitions, 1397 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:05,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:05,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:05,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:07,317 INFO L124 PetriNetUnfolderBase]: 1468/2273 cut-off events. [2024-06-28 00:38:07,317 INFO L125 PetriNetUnfolderBase]: For 26231/26240 co-relation queries the response was YES. [2024-06-28 00:38:07,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12070 conditions, 2273 events. 1468/2273 cut-off events. For 26231/26240 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11120 event pairs, 425 based on Foata normal form. 8/2272 useless extension candidates. Maximal degree in co-relation 12015. Up to 2007 conditions per place. [2024-06-28 00:38:07,333 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 52 changer transitions 0/155 dead transitions. [2024-06-28 00:38:07,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 155 transitions, 1792 flow [2024-06-28 00:38:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 00:38:07,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 00:38:07,335 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 1397 flow. Second operand 8 states and 139 transitions. [2024-06-28 00:38:07,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 155 transitions, 1792 flow [2024-06-28 00:38:07,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1779 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 00:38:07,363 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1525 flow [2024-06-28 00:38:07,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1525, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-28 00:38:07,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-28 00:38:07,364 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1525 flow [2024-06-28 00:38:07,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:07,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:07,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:07,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:38:07,365 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:07,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:07,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1933617374, now seen corresponding path program 3 times [2024-06-28 00:38:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:07,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846941141] [2024-06-28 00:38:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:10,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:10,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846941141] [2024-06-28 00:38:10,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846941141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:10,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:10,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:10,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069592280] [2024-06-28 00:38:10,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:10,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:10,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:10,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1525 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:10,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:10,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:10,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:12,051 INFO L124 PetriNetUnfolderBase]: 1456/2242 cut-off events. [2024-06-28 00:38:12,051 INFO L125 PetriNetUnfolderBase]: For 30102/30102 co-relation queries the response was YES. [2024-06-28 00:38:12,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12391 conditions, 2242 events. 1456/2242 cut-off events. For 30102/30102 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11037 event pairs, 367 based on Foata normal form. 6/2232 useless extension candidates. Maximal degree in co-relation 12333. Up to 1670 conditions per place. [2024-06-28 00:38:12,073 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 54 changer transitions 0/168 dead transitions. [2024-06-28 00:38:12,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 168 transitions, 2167 flow [2024-06-28 00:38:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 00:38:12,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-28 00:38:12,076 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1525 flow. Second operand 7 states and 139 transitions. [2024-06-28 00:38:12,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 168 transitions, 2167 flow [2024-06-28 00:38:12,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 168 transitions, 2017 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 00:38:12,106 INFO L231 Difference]: Finished difference. Result has 113 places, 133 transitions, 1541 flow [2024-06-28 00:38:12,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1541, PETRI_PLACES=113, PETRI_TRANSITIONS=133} [2024-06-28 00:38:12,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-28 00:38:12,107 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 133 transitions, 1541 flow [2024-06-28 00:38:12,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:12,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:12,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:12,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:38:12,108 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:12,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1190194484, now seen corresponding path program 2 times [2024-06-28 00:38:12,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:12,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335263130] [2024-06-28 00:38:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:12,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:15,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:15,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335263130] [2024-06-28 00:38:15,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335263130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:15,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:15,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:15,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241586635] [2024-06-28 00:38:15,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:15,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:16,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:16,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 133 transitions, 1541 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:16,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:16,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:16,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:17,320 INFO L124 PetriNetUnfolderBase]: 1476/2297 cut-off events. [2024-06-28 00:38:17,320 INFO L125 PetriNetUnfolderBase]: For 32882/32882 co-relation queries the response was YES. [2024-06-28 00:38:17,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12987 conditions, 2297 events. 1476/2297 cut-off events. For 32882/32882 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11278 event pairs, 417 based on Foata normal form. 4/2292 useless extension candidates. Maximal degree in co-relation 12927. Up to 2027 conditions per place. [2024-06-28 00:38:17,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 53 changer transitions 0/160 dead transitions. [2024-06-28 00:38:17,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 160 transitions, 1957 flow [2024-06-28 00:38:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 00:38:17,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 00:38:17,342 INFO L175 Difference]: Start difference. First operand has 113 places, 133 transitions, 1541 flow. Second operand 8 states and 135 transitions. [2024-06-28 00:38:17,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 160 transitions, 1957 flow [2024-06-28 00:38:17,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 160 transitions, 1884 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:17,375 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 1616 flow [2024-06-28 00:38:17,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1616, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-06-28 00:38:17,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-28 00:38:17,375 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 1616 flow [2024-06-28 00:38:17,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:17,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:17,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:17,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:38:17,376 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:17,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:17,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1181623604, now seen corresponding path program 3 times [2024-06-28 00:38:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:17,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169389481] [2024-06-28 00:38:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:17,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:21,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:21,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169389481] [2024-06-28 00:38:21,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169389481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:21,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:21,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:21,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832155295] [2024-06-28 00:38:21,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:21,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:21,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:21,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:21,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:21,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 1616 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 00:38:21,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:21,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:21,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:22,269 INFO L124 PetriNetUnfolderBase]: 1496/2329 cut-off events. [2024-06-28 00:38:22,269 INFO L125 PetriNetUnfolderBase]: For 37307/37307 co-relation queries the response was YES. [2024-06-28 00:38:22,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13361 conditions, 2329 events. 1496/2329 cut-off events. For 37307/37307 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11507 event pairs, 381 based on Foata normal form. 4/2324 useless extension candidates. Maximal degree in co-relation 13299. Up to 1951 conditions per place. [2024-06-28 00:38:22,286 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 103 selfloop transitions, 59 changer transitions 0/167 dead transitions. [2024-06-28 00:38:22,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 2155 flow [2024-06-28 00:38:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 00:38:22,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 00:38:22,288 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 1616 flow. Second operand 8 states and 137 transitions. [2024-06-28 00:38:22,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 2155 flow [2024-06-28 00:38:22,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 2025 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:22,318 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1683 flow [2024-06-28 00:38:22,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1683, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-28 00:38:22,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-28 00:38:22,319 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1683 flow [2024-06-28 00:38:22,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 00:38:22,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:22,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:22,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:38:22,319 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:22,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1141489096, now seen corresponding path program 4 times [2024-06-28 00:38:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:22,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936878160] [2024-06-28 00:38:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:25,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936878160] [2024-06-28 00:38:25,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936878160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:25,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:25,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:25,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870996668] [2024-06-28 00:38:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:25,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:25,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:25,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:25,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1683 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:25,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:25,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:25,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:26,196 INFO L124 PetriNetUnfolderBase]: 1626/2547 cut-off events. [2024-06-28 00:38:26,197 INFO L125 PetriNetUnfolderBase]: For 42277/42277 co-relation queries the response was YES. [2024-06-28 00:38:26,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14728 conditions, 2547 events. 1626/2547 cut-off events. For 42277/42277 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12985 event pairs, 366 based on Foata normal form. 6/2550 useless extension candidates. Maximal degree in co-relation 14666. Up to 2255 conditions per place. [2024-06-28 00:38:26,214 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 149 selfloop transitions, 48 changer transitions 0/202 dead transitions. [2024-06-28 00:38:26,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2576 flow [2024-06-28 00:38:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 00:38:26,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-28 00:38:26,216 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1683 flow. Second operand 7 states and 148 transitions. [2024-06-28 00:38:26,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2576 flow [2024-06-28 00:38:26,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2478 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:26,253 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1974 flow [2024-06-28 00:38:26,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1974, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-28 00:38:26,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-28 00:38:26,254 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1974 flow [2024-06-28 00:38:26,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:26,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:26,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:26,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:38:26,255 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:26,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1940937102, now seen corresponding path program 5 times [2024-06-28 00:38:26,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:26,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884583707] [2024-06-28 00:38:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:28,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884583707] [2024-06-28 00:38:28,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884583707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:28,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277130957] [2024-06-28 00:38:28,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:28,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:28,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:28,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1974 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:28,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:28,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:28,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:30,421 INFO L124 PetriNetUnfolderBase]: 1888/2938 cut-off events. [2024-06-28 00:38:30,422 INFO L125 PetriNetUnfolderBase]: For 49441/49447 co-relation queries the response was YES. [2024-06-28 00:38:30,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17502 conditions, 2938 events. 1888/2938 cut-off events. For 49441/49447 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15320 event pairs, 385 based on Foata normal form. 10/2943 useless extension candidates. Maximal degree in co-relation 17437. Up to 2032 conditions per place. [2024-06-28 00:38:30,445 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 138 selfloop transitions, 100 changer transitions 0/243 dead transitions. [2024-06-28 00:38:30,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 243 transitions, 3231 flow [2024-06-28 00:38:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 00:38:30,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 00:38:30,447 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1974 flow. Second operand 8 states and 164 transitions. [2024-06-28 00:38:30,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 243 transitions, 3231 flow [2024-06-28 00:38:30,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 243 transitions, 3165 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 00:38:30,515 INFO L231 Difference]: Finished difference. Result has 133 places, 191 transitions, 2497 flow [2024-06-28 00:38:30,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2497, PETRI_PLACES=133, PETRI_TRANSITIONS=191} [2024-06-28 00:38:30,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-28 00:38:30,517 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 191 transitions, 2497 flow [2024-06-28 00:38:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:30,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:30,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:30,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:38:30,517 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:30,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1056641324, now seen corresponding path program 6 times [2024-06-28 00:38:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:30,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931319617] [2024-06-28 00:38:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:32,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:32,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931319617] [2024-06-28 00:38:32,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931319617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:32,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:32,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:32,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809357177] [2024-06-28 00:38:32,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:32,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:32,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:32,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:32,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:32,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 191 transitions, 2497 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:32,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:32,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:32,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:33,944 INFO L124 PetriNetUnfolderBase]: 2003/3097 cut-off events. [2024-06-28 00:38:33,945 INFO L125 PetriNetUnfolderBase]: For 58713/58713 co-relation queries the response was YES. [2024-06-28 00:38:33,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19846 conditions, 3097 events. 2003/3097 cut-off events. For 58713/58713 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16139 event pairs, 379 based on Foata normal form. 3/3097 useless extension candidates. Maximal degree in co-relation 19777. Up to 2629 conditions per place. [2024-06-28 00:38:33,970 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 181 selfloop transitions, 96 changer transitions 0/282 dead transitions. [2024-06-28 00:38:33,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 282 transitions, 3987 flow [2024-06-28 00:38:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 00:38:33,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-28 00:38:33,972 INFO L175 Difference]: Start difference. First operand has 133 places, 191 transitions, 2497 flow. Second operand 10 states and 196 transitions. [2024-06-28 00:38:33,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 282 transitions, 3987 flow [2024-06-28 00:38:34,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 282 transitions, 3820 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:34,044 INFO L231 Difference]: Finished difference. Result has 144 places, 228 transitions, 3166 flow [2024-06-28 00:38:34,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3166, PETRI_PLACES=144, PETRI_TRANSITIONS=228} [2024-06-28 00:38:34,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-28 00:38:34,045 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 228 transitions, 3166 flow [2024-06-28 00:38:34,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:34,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:34,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:34,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:38:34,045 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:34,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:34,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1209569396, now seen corresponding path program 4 times [2024-06-28 00:38:34,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:34,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114779822] [2024-06-28 00:38:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:34,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:37,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:37,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114779822] [2024-06-28 00:38:37,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114779822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:37,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:37,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:37,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817105562] [2024-06-28 00:38:37,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:37,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:37,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:37,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:37,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 228 transitions, 3166 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:37,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:37,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:37,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:38,859 INFO L124 PetriNetUnfolderBase]: 2009/3118 cut-off events. [2024-06-28 00:38:38,859 INFO L125 PetriNetUnfolderBase]: For 66671/66677 co-relation queries the response was YES. [2024-06-28 00:38:38,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20560 conditions, 3118 events. 2009/3118 cut-off events. For 66671/66677 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16278 event pairs, 462 based on Foata normal form. 8/3121 useless extension candidates. Maximal degree in co-relation 20486. Up to 2780 conditions per place. [2024-06-28 00:38:38,888 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 204 selfloop transitions, 56 changer transitions 0/265 dead transitions. [2024-06-28 00:38:38,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 265 transitions, 3823 flow [2024-06-28 00:38:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:38:38,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 00:38:38,890 INFO L175 Difference]: Start difference. First operand has 144 places, 228 transitions, 3166 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:38:38,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 265 transitions, 3823 flow [2024-06-28 00:38:38,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 265 transitions, 3746 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:38,966 INFO L231 Difference]: Finished difference. Result has 149 places, 230 transitions, 3227 flow [2024-06-28 00:38:38,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3227, PETRI_PLACES=149, PETRI_TRANSITIONS=230} [2024-06-28 00:38:38,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-28 00:38:38,966 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 230 transitions, 3227 flow [2024-06-28 00:38:38,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:38,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:38,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:38,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:38:38,967 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:38,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:38,967 INFO L85 PathProgramCache]: Analyzing trace with hash -852633206, now seen corresponding path program 1 times [2024-06-28 00:38:38,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:38,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061554907] [2024-06-28 00:38:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:41,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:41,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061554907] [2024-06-28 00:38:41,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061554907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:41,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:41,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:38:41,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274028177] [2024-06-28 00:38:41,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:41,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:38:41,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:38:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:38:41,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:41,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 230 transitions, 3227 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:41,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:41,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:41,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:42,396 INFO L124 PetriNetUnfolderBase]: 2000/3098 cut-off events. [2024-06-28 00:38:42,396 INFO L125 PetriNetUnfolderBase]: For 70399/70399 co-relation queries the response was YES. [2024-06-28 00:38:42,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3098 events. 2000/3098 cut-off events. For 70399/70399 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16093 event pairs, 566 based on Foata normal form. 3/3098 useless extension candidates. Maximal degree in co-relation 20611. Up to 2952 conditions per place. [2024-06-28 00:38:42,421 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 226 selfloop transitions, 12 changer transitions 0/243 dead transitions. [2024-06-28 00:38:42,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 243 transitions, 3757 flow [2024-06-28 00:38:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:38:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:38:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-28 00:38:42,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 00:38:42,423 INFO L175 Difference]: Start difference. First operand has 149 places, 230 transitions, 3227 flow. Second operand 5 states and 87 transitions. [2024-06-28 00:38:42,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 243 transitions, 3757 flow [2024-06-28 00:38:42,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 243 transitions, 3626 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 00:38:42,498 INFO L231 Difference]: Finished difference. Result has 147 places, 233 transitions, 3160 flow [2024-06-28 00:38:42,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3096, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3160, PETRI_PLACES=147, PETRI_TRANSITIONS=233} [2024-06-28 00:38:42,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-28 00:38:42,499 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 233 transitions, 3160 flow [2024-06-28 00:38:42,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:42,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:42,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:42,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:38:42,499 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:42,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:42,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1575227964, now seen corresponding path program 1 times [2024-06-28 00:38:42,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:42,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360886279] [2024-06-28 00:38:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:42,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:45,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:45,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360886279] [2024-06-28 00:38:45,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360886279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:45,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:45,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:45,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660980742] [2024-06-28 00:38:45,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:45,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:45,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:45,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:45,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 233 transitions, 3160 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:45,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:45,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:45,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:47,113 INFO L124 PetriNetUnfolderBase]: 2001/3096 cut-off events. [2024-06-28 00:38:47,113 INFO L125 PetriNetUnfolderBase]: For 70825/70825 co-relation queries the response was YES. [2024-06-28 00:38:47,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20745 conditions, 3096 events. 2001/3096 cut-off events. For 70825/70825 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16055 event pairs, 377 based on Foata normal form. 3/3096 useless extension candidates. Maximal degree in co-relation 20668. Up to 2661 conditions per place. [2024-06-28 00:38:47,138 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 189 selfloop transitions, 90 changer transitions 0/284 dead transitions. [2024-06-28 00:38:47,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 284 transitions, 4016 flow [2024-06-28 00:38:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 00:38:47,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 00:38:47,140 INFO L175 Difference]: Start difference. First operand has 147 places, 233 transitions, 3160 flow. Second operand 10 states and 187 transitions. [2024-06-28 00:38:47,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 284 transitions, 4016 flow [2024-06-28 00:38:47,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 284 transitions, 3984 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:38:47,229 INFO L231 Difference]: Finished difference. Result has 155 places, 237 transitions, 3384 flow [2024-06-28 00:38:47,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3128, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3384, PETRI_PLACES=155, PETRI_TRANSITIONS=237} [2024-06-28 00:38:47,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-28 00:38:47,230 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 237 transitions, 3384 flow [2024-06-28 00:38:47,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:47,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:47,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:47,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:38:47,230 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:47,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash 964445099, now seen corresponding path program 1 times [2024-06-28 00:38:47,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:47,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943357110] [2024-06-28 00:38:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:47,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:51,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:51,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943357110] [2024-06-28 00:38:51,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943357110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:51,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:51,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:51,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936288158] [2024-06-28 00:38:51,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:51,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:51,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:51,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:51,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:51,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 237 transitions, 3384 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:51,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:51,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:51,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:52,959 INFO L124 PetriNetUnfolderBase]: 2323/3617 cut-off events. [2024-06-28 00:38:52,960 INFO L125 PetriNetUnfolderBase]: For 94924/94924 co-relation queries the response was YES. [2024-06-28 00:38:52,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24453 conditions, 3617 events. 2323/3617 cut-off events. For 94924/94924 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19633 event pairs, 410 based on Foata normal form. 24/3629 useless extension candidates. Maximal degree in co-relation 24374. Up to 2757 conditions per place. [2024-06-28 00:38:52,998 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 69 changer transitions 0/296 dead transitions. [2024-06-28 00:38:52,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 296 transitions, 4478 flow [2024-06-28 00:38:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 00:38:53,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:38:53,000 INFO L175 Difference]: Start difference. First operand has 155 places, 237 transitions, 3384 flow. Second operand 10 states and 189 transitions. [2024-06-28 00:38:53,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 296 transitions, 4478 flow [2024-06-28 00:38:53,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 296 transitions, 4341 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:53,103 INFO L231 Difference]: Finished difference. Result has 160 places, 243 transitions, 3502 flow [2024-06-28 00:38:53,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3502, PETRI_PLACES=160, PETRI_TRANSITIONS=243} [2024-06-28 00:38:53,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-28 00:38:53,103 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 243 transitions, 3502 flow [2024-06-28 00:38:53,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:53,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:53,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:53,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:38:53,104 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:53,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash -85474033, now seen corresponding path program 2 times [2024-06-28 00:38:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702516897] [2024-06-28 00:38:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:56,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702516897] [2024-06-28 00:38:56,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702516897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:56,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:56,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:56,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760254575] [2024-06-28 00:38:56,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:56,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:56,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:56,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:56,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:56,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:56,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 243 transitions, 3502 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:56,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:56,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:56,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:58,314 INFO L124 PetriNetUnfolderBase]: 2277/3551 cut-off events. [2024-06-28 00:38:58,314 INFO L125 PetriNetUnfolderBase]: For 94861/94861 co-relation queries the response was YES. [2024-06-28 00:38:58,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23978 conditions, 3551 events. 2277/3551 cut-off events. For 94861/94861 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19126 event pairs, 453 based on Foata normal form. 30/3569 useless extension candidates. Maximal degree in co-relation 23897. Up to 2954 conditions per place. [2024-06-28 00:38:58,342 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 65 changer transitions 0/284 dead transitions. [2024-06-28 00:38:58,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 284 transitions, 4385 flow [2024-06-28 00:38:58,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 00:38:58,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 00:38:58,344 INFO L175 Difference]: Start difference. First operand has 160 places, 243 transitions, 3502 flow. Second operand 9 states and 165 transitions. [2024-06-28 00:38:58,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 284 transitions, 4385 flow [2024-06-28 00:38:58,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 284 transitions, 4279 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:58,434 INFO L231 Difference]: Finished difference. Result has 165 places, 244 transitions, 3572 flow [2024-06-28 00:38:58,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3572, PETRI_PLACES=165, PETRI_TRANSITIONS=244} [2024-06-28 00:38:58,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 00:38:58,435 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 244 transitions, 3572 flow [2024-06-28 00:38:58,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:58,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:58,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:58,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:38:58,435 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:58,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:58,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1248232363, now seen corresponding path program 3 times [2024-06-28 00:38:58,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:58,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465042300] [2024-06-28 00:38:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:01,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:01,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465042300] [2024-06-28 00:39:01,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465042300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:01,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594406616] [2024-06-28 00:39:01,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:01,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:01,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:02,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:02,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 244 transitions, 3572 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:02,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:02,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:02,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:03,688 INFO L124 PetriNetUnfolderBase]: 2414/3792 cut-off events. [2024-06-28 00:39:03,688 INFO L125 PetriNetUnfolderBase]: For 103178/103184 co-relation queries the response was YES. [2024-06-28 00:39:03,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25166 conditions, 3792 events. 2414/3792 cut-off events. For 103178/103184 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21049 event pairs, 532 based on Foata normal form. 32/3806 useless extension candidates. Maximal degree in co-relation 25083. Up to 2550 conditions per place. [2024-06-28 00:39:03,721 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 161 selfloop transitions, 125 changer transitions 0/291 dead transitions. [2024-06-28 00:39:03,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 291 transitions, 4616 flow [2024-06-28 00:39:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:39:03,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 00:39:03,722 INFO L175 Difference]: Start difference. First operand has 165 places, 244 transitions, 3572 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:39:03,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 291 transitions, 4616 flow [2024-06-28 00:39:03,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 291 transitions, 4480 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:03,834 INFO L231 Difference]: Finished difference. Result has 165 places, 246 transitions, 3744 flow [2024-06-28 00:39:03,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3744, PETRI_PLACES=165, PETRI_TRANSITIONS=246} [2024-06-28 00:39:03,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 00:39:03,835 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 246 transitions, 3744 flow [2024-06-28 00:39:03,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:03,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:03,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:39:03,836 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:03,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1129987529, now seen corresponding path program 1 times [2024-06-28 00:39:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:03,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502142643] [2024-06-28 00:39:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:08,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:08,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502142643] [2024-06-28 00:39:08,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502142643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:08,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:08,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609287253] [2024-06-28 00:39:08,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:08,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:08,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:08,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:08,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 246 transitions, 3744 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:08,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:08,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:08,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:09,959 INFO L124 PetriNetUnfolderBase]: 2561/4041 cut-off events. [2024-06-28 00:39:09,959 INFO L125 PetriNetUnfolderBase]: For 111495/111501 co-relation queries the response was YES. [2024-06-28 00:39:09,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27503 conditions, 4041 events. 2561/4041 cut-off events. For 111495/111501 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22840 event pairs, 571 based on Foata normal form. 20/4043 useless extension candidates. Maximal degree in co-relation 27419. Up to 2199 conditions per place. [2024-06-28 00:39:09,993 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 120 changer transitions 0/299 dead transitions. [2024-06-28 00:39:09,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 299 transitions, 4920 flow [2024-06-28 00:39:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:39:09,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 00:39:09,995 INFO L175 Difference]: Start difference. First operand has 165 places, 246 transitions, 3744 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:39:09,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 299 transitions, 4920 flow [2024-06-28 00:39:10,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 299 transitions, 4648 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:10,126 INFO L231 Difference]: Finished difference. Result has 169 places, 249 transitions, 3804 flow [2024-06-28 00:39:10,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3804, PETRI_PLACES=169, PETRI_TRANSITIONS=249} [2024-06-28 00:39:10,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-28 00:39:10,127 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 249 transitions, 3804 flow [2024-06-28 00:39:10,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:10,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:10,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:10,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:39:10,128 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:10,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash 946840393, now seen corresponding path program 1 times [2024-06-28 00:39:10,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:10,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601732971] [2024-06-28 00:39:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:10,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:12,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:12,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601732971] [2024-06-28 00:39:12,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601732971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:12,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:12,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:39:12,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260613038] [2024-06-28 00:39:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:12,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:39:12,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:12,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:39:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:39:13,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:13,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 249 transitions, 3804 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:13,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:13,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:13,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:14,333 INFO L124 PetriNetUnfolderBase]: 2549/4033 cut-off events. [2024-06-28 00:39:14,334 INFO L125 PetriNetUnfolderBase]: For 110163/110163 co-relation queries the response was YES. [2024-06-28 00:39:14,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27500 conditions, 4033 events. 2549/4033 cut-off events. For 110163/110163 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22809 event pairs, 582 based on Foata normal form. 2/4023 useless extension candidates. Maximal degree in co-relation 27415. Up to 3742 conditions per place. [2024-06-28 00:39:14,374 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 45 changer transitions 0/273 dead transitions. [2024-06-28 00:39:14,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 273 transitions, 4578 flow [2024-06-28 00:39:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:39:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:39:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 00:39:14,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-28 00:39:14,375 INFO L175 Difference]: Start difference. First operand has 169 places, 249 transitions, 3804 flow. Second operand 6 states and 119 transitions. [2024-06-28 00:39:14,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 273 transitions, 4578 flow [2024-06-28 00:39:14,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 273 transitions, 4432 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:14,517 INFO L231 Difference]: Finished difference. Result has 170 places, 249 transitions, 3770 flow [2024-06-28 00:39:14,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3770, PETRI_PLACES=170, PETRI_TRANSITIONS=249} [2024-06-28 00:39:14,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-28 00:39:14,517 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 249 transitions, 3770 flow [2024-06-28 00:39:14,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:14,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:14,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:14,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:39:14,518 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:14,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1372290381, now seen corresponding path program 4 times [2024-06-28 00:39:14,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:14,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34789916] [2024-06-28 00:39:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:14,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:18,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:18,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34789916] [2024-06-28 00:39:18,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34789916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:18,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:18,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055851335] [2024-06-28 00:39:18,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:18,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:18,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 249 transitions, 3770 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:18,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:18,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:18,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:20,053 INFO L124 PetriNetUnfolderBase]: 2686/4250 cut-off events. [2024-06-28 00:39:20,053 INFO L125 PetriNetUnfolderBase]: For 125594/125594 co-relation queries the response was YES. [2024-06-28 00:39:20,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28915 conditions, 4250 events. 2686/4250 cut-off events. For 125594/125594 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24400 event pairs, 571 based on Foata normal form. 30/4261 useless extension candidates. Maximal degree in co-relation 28827. Up to 3006 conditions per place. [2024-06-28 00:39:20,086 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 124 changer transitions 0/293 dead transitions. [2024-06-28 00:39:20,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 293 transitions, 4834 flow [2024-06-28 00:39:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 00:39:20,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 00:39:20,088 INFO L175 Difference]: Start difference. First operand has 170 places, 249 transitions, 3770 flow. Second operand 9 states and 166 transitions. [2024-06-28 00:39:20,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 293 transitions, 4834 flow [2024-06-28 00:39:20,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 293 transitions, 4759 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:39:20,206 INFO L231 Difference]: Finished difference. Result has 175 places, 250 transitions, 3970 flow [2024-06-28 00:39:20,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3970, PETRI_PLACES=175, PETRI_TRANSITIONS=250} [2024-06-28 00:39:20,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-28 00:39:20,207 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 250 transitions, 3970 flow [2024-06-28 00:39:20,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:20,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:20,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:39:20,208 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:20,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1315567861, now seen corresponding path program 2 times [2024-06-28 00:39:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:20,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805204419] [2024-06-28 00:39:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:20,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:24,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:24,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805204419] [2024-06-28 00:39:24,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805204419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:24,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:24,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:24,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727808451] [2024-06-28 00:39:24,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:24,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:24,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:24,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:24,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 250 transitions, 3970 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:24,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:24,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:24,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:26,501 INFO L124 PetriNetUnfolderBase]: 2774/4411 cut-off events. [2024-06-28 00:39:26,501 INFO L125 PetriNetUnfolderBase]: For 131842/131842 co-relation queries the response was YES. [2024-06-28 00:39:26,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30666 conditions, 4411 events. 2774/4411 cut-off events. For 131842/131842 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25756 event pairs, 586 based on Foata normal form. 18/4410 useless extension candidates. Maximal degree in co-relation 30576. Up to 2982 conditions per place. [2024-06-28 00:39:26,540 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 173 selfloop transitions, 123 changer transitions 0/301 dead transitions. [2024-06-28 00:39:26,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 301 transitions, 5202 flow [2024-06-28 00:39:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:39:26,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 00:39:26,542 INFO L175 Difference]: Start difference. First operand has 175 places, 250 transitions, 3970 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:39:26,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 301 transitions, 5202 flow [2024-06-28 00:39:26,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 301 transitions, 4911 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:26,699 INFO L231 Difference]: Finished difference. Result has 177 places, 253 transitions, 4006 flow [2024-06-28 00:39:26,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4006, PETRI_PLACES=177, PETRI_TRANSITIONS=253} [2024-06-28 00:39:26,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-28 00:39:26,700 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 253 transitions, 4006 flow [2024-06-28 00:39:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:26,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:26,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:26,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:39:26,700 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:26,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1668886773, now seen corresponding path program 3 times [2024-06-28 00:39:26,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:26,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603979268] [2024-06-28 00:39:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:30,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:30,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603979268] [2024-06-28 00:39:30,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603979268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:30,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:30,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369592069] [2024-06-28 00:39:30,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:30,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:30,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:30,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 253 transitions, 4006 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:30,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:30,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:30,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:32,824 INFO L124 PetriNetUnfolderBase]: 3004/4800 cut-off events. [2024-06-28 00:39:32,824 INFO L125 PetriNetUnfolderBase]: For 154180/154180 co-relation queries the response was YES. [2024-06-28 00:39:32,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33794 conditions, 4800 events. 3004/4800 cut-off events. For 154180/154180 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28534 event pairs, 602 based on Foata normal form. 18/4799 useless extension candidates. Maximal degree in co-relation 33703. Up to 1882 conditions per place. [2024-06-28 00:39:32,861 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 172 selfloop transitions, 129 changer transitions 0/306 dead transitions. [2024-06-28 00:39:32,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 306 transitions, 5326 flow [2024-06-28 00:39:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:39:32,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 00:39:32,863 INFO L175 Difference]: Start difference. First operand has 177 places, 253 transitions, 4006 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:39:32,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 306 transitions, 5326 flow [2024-06-28 00:39:33,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 306 transitions, 5160 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:33,042 INFO L231 Difference]: Finished difference. Result has 183 places, 258 transitions, 4276 flow [2024-06-28 00:39:33,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4276, PETRI_PLACES=183, PETRI_TRANSITIONS=258} [2024-06-28 00:39:33,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-28 00:39:33,043 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 258 transitions, 4276 flow [2024-06-28 00:39:33,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:33,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:33,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:33,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:39:33,043 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:33,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1645546603, now seen corresponding path program 2 times [2024-06-28 00:39:33,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:33,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943838198] [2024-06-28 00:39:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:36,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:36,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943838198] [2024-06-28 00:39:36,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943838198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:36,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:36,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:39:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018998426] [2024-06-28 00:39:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:36,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:39:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:39:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:39:36,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:36,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 258 transitions, 4276 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:36,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:36,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:36,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:37,618 INFO L124 PetriNetUnfolderBase]: 2974/4752 cut-off events. [2024-06-28 00:39:37,618 INFO L125 PetriNetUnfolderBase]: For 158088/158088 co-relation queries the response was YES. [2024-06-28 00:39:37,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34799 conditions, 4752 events. 2974/4752 cut-off events. For 158088/158088 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28217 event pairs, 754 based on Foata normal form. 1/4741 useless extension candidates. Maximal degree in co-relation 34704. Up to 4444 conditions per place. [2024-06-28 00:39:37,659 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 52 changer transitions 0/281 dead transitions. [2024-06-28 00:39:37,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 281 transitions, 5118 flow [2024-06-28 00:39:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:39:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:39:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 00:39:37,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:39:37,660 INFO L175 Difference]: Start difference. First operand has 183 places, 258 transitions, 4276 flow. Second operand 6 states and 112 transitions. [2024-06-28 00:39:37,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 281 transitions, 5118 flow [2024-06-28 00:39:37,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 281 transitions, 4925 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 00:39:37,864 INFO L231 Difference]: Finished difference. Result has 186 places, 264 transitions, 4364 flow [2024-06-28 00:39:37,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4090, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4364, PETRI_PLACES=186, PETRI_TRANSITIONS=264} [2024-06-28 00:39:37,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-28 00:39:37,865 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 264 transitions, 4364 flow [2024-06-28 00:39:37,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:37,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:37,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:37,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:39:37,865 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:37,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:37,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1166631117, now seen corresponding path program 5 times [2024-06-28 00:39:37,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:37,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733716190] [2024-06-28 00:39:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:37,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:41,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:41,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733716190] [2024-06-28 00:39:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733716190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:41,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:41,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:41,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329651379] [2024-06-28 00:39:41,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:41,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:41,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:41,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:41,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 264 transitions, 4364 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:41,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:41,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:41,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:43,039 INFO L124 PetriNetUnfolderBase]: 3489/5592 cut-off events. [2024-06-28 00:39:43,039 INFO L125 PetriNetUnfolderBase]: For 193411/193411 co-relation queries the response was YES. [2024-06-28 00:39:43,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40244 conditions, 5592 events. 3489/5592 cut-off events. For 193411/193411 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34480 event pairs, 792 based on Foata normal form. 24/5613 useless extension candidates. Maximal degree in co-relation 40145. Up to 4451 conditions per place. [2024-06-28 00:39:43,092 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 81 changer transitions 0/338 dead transitions. [2024-06-28 00:39:43,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 338 transitions, 5735 flow [2024-06-28 00:39:43,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-28 00:39:43,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-28 00:39:43,093 INFO L175 Difference]: Start difference. First operand has 186 places, 264 transitions, 4364 flow. Second operand 9 states and 190 transitions. [2024-06-28 00:39:43,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 338 transitions, 5735 flow [2024-06-28 00:39:43,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 338 transitions, 5671 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:39:43,356 INFO L231 Difference]: Finished difference. Result has 194 places, 277 transitions, 4720 flow [2024-06-28 00:39:43,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4720, PETRI_PLACES=194, PETRI_TRANSITIONS=277} [2024-06-28 00:39:43,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-28 00:39:43,357 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 277 transitions, 4720 flow [2024-06-28 00:39:43,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:43,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:43,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:43,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:39:43,358 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:43,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1252376683, now seen corresponding path program 6 times [2024-06-28 00:39:43,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:43,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114072932] [2024-06-28 00:39:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:43,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:46,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114072932] [2024-06-28 00:39:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114072932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:46,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:46,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115708180] [2024-06-28 00:39:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:46,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:46,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:46,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:46,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 277 transitions, 4720 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:46,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:46,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:46,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:48,549 INFO L124 PetriNetUnfolderBase]: 3443/5526 cut-off events. [2024-06-28 00:39:48,549 INFO L125 PetriNetUnfolderBase]: For 198059/198059 co-relation queries the response was YES. [2024-06-28 00:39:48,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40171 conditions, 5526 events. 3443/5526 cut-off events. For 198059/198059 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33975 event pairs, 827 based on Foata normal form. 30/5553 useless extension candidates. Maximal degree in co-relation 40070. Up to 4765 conditions per place. [2024-06-28 00:39:48,603 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 249 selfloop transitions, 72 changer transitions 0/326 dead transitions. [2024-06-28 00:39:48,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 326 transitions, 5741 flow [2024-06-28 00:39:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:39:48,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-28 00:39:48,605 INFO L175 Difference]: Start difference. First operand has 194 places, 277 transitions, 4720 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:39:48,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 326 transitions, 5741 flow [2024-06-28 00:39:48,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 326 transitions, 5547 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-28 00:39:48,932 INFO L231 Difference]: Finished difference. Result has 198 places, 278 transitions, 4726 flow [2024-06-28 00:39:48,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4726, PETRI_PLACES=198, PETRI_TRANSITIONS=278} [2024-06-28 00:39:48,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-28 00:39:48,933 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 278 transitions, 4726 flow [2024-06-28 00:39:48,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:48,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:48,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:48,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:39:48,934 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:48,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1533306987, now seen corresponding path program 7 times [2024-06-28 00:39:48,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:48,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537767467] [2024-06-28 00:39:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:48,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:52,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:52,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537767467] [2024-06-28 00:39:52,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537767467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:52,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:52,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:52,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658306791] [2024-06-28 00:39:52,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:52,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:52,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:52,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:52,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:52,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 278 transitions, 4726 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:52,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:52,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:52,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:54,287 INFO L124 PetriNetUnfolderBase]: 3727/6004 cut-off events. [2024-06-28 00:39:54,287 INFO L125 PetriNetUnfolderBase]: For 212681/212684 co-relation queries the response was YES. [2024-06-28 00:39:54,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42319 conditions, 6004 events. 3727/6004 cut-off events. For 212681/212684 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37884 event pairs, 818 based on Foata normal form. 42/6040 useless extension candidates. Maximal degree in co-relation 42217. Up to 4530 conditions per place. [2024-06-28 00:39:54,348 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 134 changer transitions 0/341 dead transitions. [2024-06-28 00:39:54,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 341 transitions, 6150 flow [2024-06-28 00:39:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 00:39:54,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 00:39:54,349 INFO L175 Difference]: Start difference. First operand has 198 places, 278 transitions, 4726 flow. Second operand 9 states and 183 transitions. [2024-06-28 00:39:54,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 341 transitions, 6150 flow [2024-06-28 00:39:54,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 341 transitions, 6017 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:54,690 INFO L231 Difference]: Finished difference. Result has 201 places, 281 transitions, 4933 flow [2024-06-28 00:39:54,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4933, PETRI_PLACES=201, PETRI_TRANSITIONS=281} [2024-06-28 00:39:54,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 00:39:54,691 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 281 transitions, 4933 flow [2024-06-28 00:39:54,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:54,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:54,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:54,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:39:54,692 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:54,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1539978187, now seen corresponding path program 4 times [2024-06-28 00:39:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:54,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540224170] [2024-06-28 00:39:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:58,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:58,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540224170] [2024-06-28 00:39:58,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540224170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:58,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:58,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:58,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031111365] [2024-06-28 00:39:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:58,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:58,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:58,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:58,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 281 transitions, 4933 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:58,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:58,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:58,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:01,028 INFO L124 PetriNetUnfolderBase]: 4033/6516 cut-off events. [2024-06-28 00:40:01,028 INFO L125 PetriNetUnfolderBase]: For 224267/224270 co-relation queries the response was YES. [2024-06-28 00:40:01,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46508 conditions, 6516 events. 4033/6516 cut-off events. For 224267/224270 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42014 event pairs, 852 based on Foata normal form. 20/6531 useless extension candidates. Maximal degree in co-relation 46404. Up to 3800 conditions per place. [2024-06-28 00:40:01,086 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 212 selfloop transitions, 137 changer transitions 0/354 dead transitions. [2024-06-28 00:40:01,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 354 transitions, 6678 flow [2024-06-28 00:40:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 00:40:01,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-28 00:40:01,087 INFO L175 Difference]: Start difference. First operand has 201 places, 281 transitions, 4933 flow. Second operand 9 states and 186 transitions. [2024-06-28 00:40:01,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 354 transitions, 6678 flow [2024-06-28 00:40:01,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 354 transitions, 6488 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:40:01,429 INFO L231 Difference]: Finished difference. Result has 206 places, 288 transitions, 5223 flow [2024-06-28 00:40:01,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4743, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5223, PETRI_PLACES=206, PETRI_TRANSITIONS=288} [2024-06-28 00:40:01,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 00:40:01,429 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 288 transitions, 5223 flow [2024-06-28 00:40:01,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:01,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:01,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:01,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:40:01,430 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:01,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1817206059, now seen corresponding path program 8 times [2024-06-28 00:40:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:01,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249099532] [2024-06-28 00:40:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:01,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:03,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:03,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249099532] [2024-06-28 00:40:03,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249099532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:03,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:03,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:03,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829202198] [2024-06-28 00:40:03,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:03,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:03,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:03,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:03,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:03,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 288 transitions, 5223 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:03,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:03,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:03,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:05,999 INFO L124 PetriNetUnfolderBase]: 4607/7460 cut-off events. [2024-06-28 00:40:06,000 INFO L125 PetriNetUnfolderBase]: For 258671/258671 co-relation queries the response was YES. [2024-06-28 00:40:06,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52971 conditions, 7460 events. 4607/7460 cut-off events. For 258671/258671 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 49482 event pairs, 1109 based on Foata normal form. 6/7463 useless extension candidates. Maximal degree in co-relation 52865. Up to 5805 conditions per place. [2024-06-28 00:40:06,066 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 243 selfloop transitions, 130 changer transitions 0/378 dead transitions. [2024-06-28 00:40:06,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 378 transitions, 6940 flow [2024-06-28 00:40:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-28 00:40:06,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-28 00:40:06,068 INFO L175 Difference]: Start difference. First operand has 206 places, 288 transitions, 5223 flow. Second operand 11 states and 217 transitions. [2024-06-28 00:40:06,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 378 transitions, 6940 flow [2024-06-28 00:40:06,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 378 transitions, 6729 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 00:40:06,532 INFO L231 Difference]: Finished difference. Result has 212 places, 313 transitions, 5744 flow [2024-06-28 00:40:06,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5744, PETRI_PLACES=212, PETRI_TRANSITIONS=313} [2024-06-28 00:40:06,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-28 00:40:06,532 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 313 transitions, 5744 flow [2024-06-28 00:40:06,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:06,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:06,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:06,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:40:06,533 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:06,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1820063019, now seen corresponding path program 9 times [2024-06-28 00:40:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:06,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326414462] [2024-06-28 00:40:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:08,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326414462] [2024-06-28 00:40:08,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326414462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:08,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:08,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:08,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844398896] [2024-06-28 00:40:08,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:08,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:08,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:08,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:08,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 313 transitions, 5744 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:08,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:08,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:08,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:11,315 INFO L124 PetriNetUnfolderBase]: 4608/7483 cut-off events. [2024-06-28 00:40:11,315 INFO L125 PetriNetUnfolderBase]: For 272174/272174 co-relation queries the response was YES. [2024-06-28 00:40:11,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54922 conditions, 7483 events. 4608/7483 cut-off events. For 272174/272174 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 49986 event pairs, 1371 based on Foata normal form. 6/7486 useless extension candidates. Maximal degree in co-relation 54813. Up to 6842 conditions per place. [2024-06-28 00:40:11,390 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 259 selfloop transitions, 112 changer transitions 0/376 dead transitions. [2024-06-28 00:40:11,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 376 transitions, 7075 flow [2024-06-28 00:40:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-28 00:40:11,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:40:11,392 INFO L175 Difference]: Start difference. First operand has 212 places, 313 transitions, 5744 flow. Second operand 11 states and 209 transitions. [2024-06-28 00:40:11,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 376 transitions, 7075 flow [2024-06-28 00:40:11,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 376 transitions, 6851 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:11,851 INFO L231 Difference]: Finished difference. Result has 216 places, 320 transitions, 5937 flow [2024-06-28 00:40:11,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5937, PETRI_PLACES=216, PETRI_TRANSITIONS=320} [2024-06-28 00:40:11,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-28 00:40:11,852 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 320 transitions, 5937 flow [2024-06-28 00:40:11,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:11,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:11,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:40:11,853 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:11,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash -337053363, now seen corresponding path program 10 times [2024-06-28 00:40:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:11,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820472633] [2024-06-28 00:40:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:11,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:13,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:13,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820472633] [2024-06-28 00:40:13,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820472633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:13,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:13,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:40:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278662175] [2024-06-28 00:40:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:13,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:40:13,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:13,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:40:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:40:13,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:40:13,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 320 transitions, 5937 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:13,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:13,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:40:13,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:15,802 INFO L124 PetriNetUnfolderBase]: 4031/7034 cut-off events. [2024-06-28 00:40:15,803 INFO L125 PetriNetUnfolderBase]: For 302166/302507 co-relation queries the response was YES. [2024-06-28 00:40:15,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54044 conditions, 7034 events. 4031/7034 cut-off events. For 302166/302507 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 51278 event pairs, 627 based on Foata normal form. 92/7006 useless extension candidates. Maximal degree in co-relation 53933. Up to 3681 conditions per place. [2024-06-28 00:40:15,873 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 150 changer transitions 0/402 dead transitions. [2024-06-28 00:40:15,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 402 transitions, 7615 flow [2024-06-28 00:40:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:40:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:40:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-28 00:40:15,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-28 00:40:15,875 INFO L175 Difference]: Start difference. First operand has 216 places, 320 transitions, 5937 flow. Second operand 10 states and 216 transitions. [2024-06-28 00:40:15,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 402 transitions, 7615 flow [2024-06-28 00:40:16,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 402 transitions, 7349 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-28 00:40:16,364 INFO L231 Difference]: Finished difference. Result has 221 places, 345 transitions, 6632 flow [2024-06-28 00:40:16,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6632, PETRI_PLACES=221, PETRI_TRANSITIONS=345} [2024-06-28 00:40:16,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-28 00:40:16,364 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 345 transitions, 6632 flow [2024-06-28 00:40:16,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:16,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:16,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:16,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:40:16,365 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:16,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1820067979, now seen corresponding path program 5 times [2024-06-28 00:40:16,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:16,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413350377] [2024-06-28 00:40:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:19,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:19,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413350377] [2024-06-28 00:40:19,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413350377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:19,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:19,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:19,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488754738] [2024-06-28 00:40:19,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:19,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:19,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:19,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:19,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:19,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:19,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 345 transitions, 6632 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:19,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:19,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:19,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:22,501 INFO L124 PetriNetUnfolderBase]: 4979/8094 cut-off events. [2024-06-28 00:40:22,502 INFO L125 PetriNetUnfolderBase]: For 317602/317602 co-relation queries the response was YES. [2024-06-28 00:40:22,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60589 conditions, 8094 events. 4979/8094 cut-off events. For 317602/317602 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 54828 event pairs, 1360 based on Foata normal form. 42/8133 useless extension candidates. Maximal degree in co-relation 60474. Up to 6651 conditions per place. [2024-06-28 00:40:22,596 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 276 selfloop transitions, 124 changer transitions 0/405 dead transitions. [2024-06-28 00:40:22,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 405 transitions, 7877 flow [2024-06-28 00:40:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-28 00:40:22,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 00:40:22,598 INFO L175 Difference]: Start difference. First operand has 221 places, 345 transitions, 6632 flow. Second operand 11 states and 210 transitions. [2024-06-28 00:40:22,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 405 transitions, 7877 flow [2024-06-28 00:40:23,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 405 transitions, 7740 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-28 00:40:23,365 INFO L231 Difference]: Finished difference. Result has 229 places, 347 transitions, 6838 flow [2024-06-28 00:40:23,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6838, PETRI_PLACES=229, PETRI_TRANSITIONS=347} [2024-06-28 00:40:23,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-28 00:40:23,366 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 347 transitions, 6838 flow [2024-06-28 00:40:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:23,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:23,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:23,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:40:23,367 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:23,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1869681771, now seen corresponding path program 3 times [2024-06-28 00:40:23,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:23,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821858544] [2024-06-28 00:40:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:25,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821858544] [2024-06-28 00:40:25,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821858544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:25,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:25,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:40:25,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140868410] [2024-06-28 00:40:25,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:25,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:40:25,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:40:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:40:25,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:25,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 347 transitions, 6838 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:25,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:25,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:25,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:27,892 INFO L124 PetriNetUnfolderBase]: 4944/8025 cut-off events. [2024-06-28 00:40:27,892 INFO L125 PetriNetUnfolderBase]: For 291084/291084 co-relation queries the response was YES. [2024-06-28 00:40:28,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60399 conditions, 8025 events. 4944/8025 cut-off events. For 291084/291084 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 54351 event pairs, 1562 based on Foata normal form. 1/8023 useless extension candidates. Maximal degree in co-relation 60282. Up to 7650 conditions per place. [2024-06-28 00:40:28,159 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 55 changer transitions 0/380 dead transitions. [2024-06-28 00:40:28,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 380 transitions, 7880 flow [2024-06-28 00:40:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:40:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:40:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 00:40:28,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-28 00:40:28,161 INFO L175 Difference]: Start difference. First operand has 229 places, 347 transitions, 6838 flow. Second operand 7 states and 134 transitions. [2024-06-28 00:40:28,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 380 transitions, 7880 flow [2024-06-28 00:40:28,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 380 transitions, 7691 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 00:40:28,641 INFO L231 Difference]: Finished difference. Result has 231 places, 350 transitions, 6920 flow [2024-06-28 00:40:28,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6661, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6920, PETRI_PLACES=231, PETRI_TRANSITIONS=350} [2024-06-28 00:40:28,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-28 00:40:28,641 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 350 transitions, 6920 flow [2024-06-28 00:40:28,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:28,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:28,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:28,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:40:28,642 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:28,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:28,643 INFO L85 PathProgramCache]: Analyzing trace with hash 953513577, now seen corresponding path program 1 times [2024-06-28 00:40:28,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:28,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526429237] [2024-06-28 00:40:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:28,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:31,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:31,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526429237] [2024-06-28 00:40:31,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526429237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:31,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:31,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:40:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471695097] [2024-06-28 00:40:31,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:31,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:40:31,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:40:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:40:31,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:40:31,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 350 transitions, 6920 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-28 00:40:31,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:31,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:40:31,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:33,527 INFO L124 PetriNetUnfolderBase]: 4702/7798 cut-off events. [2024-06-28 00:40:33,527 INFO L125 PetriNetUnfolderBase]: For 302131/302173 co-relation queries the response was YES. [2024-06-28 00:40:33,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56807 conditions, 7798 events. 4702/7798 cut-off events. For 302131/302173 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 54703 event pairs, 2243 based on Foata normal form. 6/7771 useless extension candidates. Maximal degree in co-relation 56688. Up to 6852 conditions per place. [2024-06-28 00:40:33,601 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 26 changer transitions 0/378 dead transitions. [2024-06-28 00:40:33,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 378 transitions, 7758 flow [2024-06-28 00:40:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:40:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:40:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 00:40:33,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:40:33,603 INFO L175 Difference]: Start difference. First operand has 231 places, 350 transitions, 6920 flow. Second operand 6 states and 114 transitions. [2024-06-28 00:40:33,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 378 transitions, 7758 flow [2024-06-28 00:40:34,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 378 transitions, 7666 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 00:40:34,081 INFO L231 Difference]: Finished difference. Result has 234 places, 358 transitions, 6987 flow [2024-06-28 00:40:34,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6987, PETRI_PLACES=234, PETRI_TRANSITIONS=358} [2024-06-28 00:40:34,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-28 00:40:34,082 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 358 transitions, 6987 flow [2024-06-28 00:40:34,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-28 00:40:34,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:34,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:34,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:40:34,082 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:34,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1645553547, now seen corresponding path program 2 times [2024-06-28 00:40:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:34,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276765588] [2024-06-28 00:40:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:34,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:36,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:36,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276765588] [2024-06-28 00:40:36,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276765588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:36,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:36,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:40:36,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793924444] [2024-06-28 00:40:36,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:36,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:40:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:40:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:40:36,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:40:36,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 358 transitions, 6987 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-28 00:40:36,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:36,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:40:36,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:38,935 INFO L124 PetriNetUnfolderBase]: 4684/7781 cut-off events. [2024-06-28 00:40:38,935 INFO L125 PetriNetUnfolderBase]: For 306445/306487 co-relation queries the response was YES. [2024-06-28 00:40:38,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57072 conditions, 7781 events. 4684/7781 cut-off events. For 306445/306487 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54639 event pairs, 2234 based on Foata normal form. 6/7757 useless extension candidates. Maximal degree in co-relation 56951. Up to 6879 conditions per place. [2024-06-28 00:40:39,013 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 17 changer transitions 0/371 dead transitions. [2024-06-28 00:40:39,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 371 transitions, 7599 flow [2024-06-28 00:40:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:40:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:40:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 00:40:39,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 00:40:39,015 INFO L175 Difference]: Start difference. First operand has 234 places, 358 transitions, 6987 flow. Second operand 7 states and 114 transitions. [2024-06-28 00:40:39,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 371 transitions, 7599 flow [2024-06-28 00:40:39,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 371 transitions, 7541 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-28 00:40:39,512 INFO L231 Difference]: Finished difference. Result has 239 places, 358 transitions, 6972 flow [2024-06-28 00:40:39,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6972, PETRI_PLACES=239, PETRI_TRANSITIONS=358} [2024-06-28 00:40:39,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-28 00:40:39,513 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 358 transitions, 6972 flow [2024-06-28 00:40:39,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-28 00:40:39,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:39,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:39,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:40:39,514 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:39,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash -712717654, now seen corresponding path program 1 times [2024-06-28 00:40:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:39,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49450705] [2024-06-28 00:40:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:39,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:43,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49450705] [2024-06-28 00:40:43,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49450705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:43,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:43,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:43,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245056653] [2024-06-28 00:40:43,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:43,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:43,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:43,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:43,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:43,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 358 transitions, 6972 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:43,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:43,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:43,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:45,613 INFO L124 PetriNetUnfolderBase]: 4966/8072 cut-off events. [2024-06-28 00:40:45,613 INFO L125 PetriNetUnfolderBase]: For 312287/312287 co-relation queries the response was YES. [2024-06-28 00:40:45,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60893 conditions, 8072 events. 4966/8072 cut-off events. For 312287/312287 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 54864 event pairs, 1768 based on Foata normal form. 2/8071 useless extension candidates. Maximal degree in co-relation 60769. Up to 7644 conditions per place. [2024-06-28 00:40:45,695 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 333 selfloop transitions, 64 changer transitions 0/402 dead transitions. [2024-06-28 00:40:45,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 402 transitions, 8229 flow [2024-06-28 00:40:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 00:40:45,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 00:40:45,697 INFO L175 Difference]: Start difference. First operand has 239 places, 358 transitions, 6972 flow. Second operand 9 states and 159 transitions. [2024-06-28 00:40:45,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 402 transitions, 8229 flow [2024-06-28 00:40:46,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 402 transitions, 8145 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:46,259 INFO L231 Difference]: Finished difference. Result has 243 places, 370 transitions, 7169 flow [2024-06-28 00:40:46,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6900, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7169, PETRI_PLACES=243, PETRI_TRANSITIONS=370} [2024-06-28 00:40:46,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-28 00:40:46,260 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 370 transitions, 7169 flow [2024-06-28 00:40:46,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:46,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:46,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:46,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:40:46,261 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:46,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:46,261 INFO L85 PathProgramCache]: Analyzing trace with hash -527661624, now seen corresponding path program 2 times [2024-06-28 00:40:46,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:46,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020826243] [2024-06-28 00:40:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:46,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:49,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:49,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020826243] [2024-06-28 00:40:49,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020826243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:49,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:49,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:49,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927475505] [2024-06-28 00:40:49,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:49,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:49,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:49,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:49,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:49,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 370 transitions, 7169 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:49,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:49,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:49,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:52,477 INFO L124 PetriNetUnfolderBase]: 5007/8126 cut-off events. [2024-06-28 00:40:52,477 INFO L125 PetriNetUnfolderBase]: For 330189/330189 co-relation queries the response was YES. [2024-06-28 00:40:52,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62236 conditions, 8126 events. 5007/8126 cut-off events. For 330189/330189 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55040 event pairs, 1776 based on Foata normal form. 4/8121 useless extension candidates. Maximal degree in co-relation 62111. Up to 7657 conditions per place. [2024-06-28 00:40:52,560 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 75 changer transitions 0/414 dead transitions. [2024-06-28 00:40:52,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 414 transitions, 8571 flow [2024-06-28 00:40:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:40:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:40:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:40:52,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 00:40:52,562 INFO L175 Difference]: Start difference. First operand has 243 places, 370 transitions, 7169 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:40:52,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 414 transitions, 8571 flow [2024-06-28 00:40:53,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 414 transitions, 8422 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-28 00:40:53,253 INFO L231 Difference]: Finished difference. Result has 248 places, 384 transitions, 7363 flow [2024-06-28 00:40:53,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7363, PETRI_PLACES=248, PETRI_TRANSITIONS=384} [2024-06-28 00:40:53,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-28 00:40:53,254 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 384 transitions, 7363 flow [2024-06-28 00:40:53,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:53,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:53,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:53,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:40:53,255 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:53,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:53,255 INFO L85 PathProgramCache]: Analyzing trace with hash -358038904, now seen corresponding path program 3 times [2024-06-28 00:40:53,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:53,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224576470] [2024-06-28 00:40:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:53,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:57,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:57,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224576470] [2024-06-28 00:40:57,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224576470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:57,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:57,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:57,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697670700] [2024-06-28 00:40:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:57,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:57,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:57,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:57,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 384 transitions, 7363 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:57,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:57,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:57,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:59,972 INFO L124 PetriNetUnfolderBase]: 5001/8122 cut-off events. [2024-06-28 00:40:59,973 INFO L125 PetriNetUnfolderBase]: For 337493/337493 co-relation queries the response was YES. [2024-06-28 00:41:00,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62873 conditions, 8122 events. 5001/8122 cut-off events. For 337493/337493 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55375 event pairs, 2266 based on Foata normal form. 2/8121 useless extension candidates. Maximal degree in co-relation 62745. Up to 7836 conditions per place. [2024-06-28 00:41:00,054 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 22 changer transitions 0/399 dead transitions. [2024-06-28 00:41:00,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 399 transitions, 8253 flow [2024-06-28 00:41:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:41:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:41:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 00:41:00,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-28 00:41:00,055 INFO L175 Difference]: Start difference. First operand has 248 places, 384 transitions, 7363 flow. Second operand 7 states and 109 transitions. [2024-06-28 00:41:00,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 399 transitions, 8253 flow [2024-06-28 00:41:00,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 399 transitions, 8154 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-28 00:41:00,738 INFO L231 Difference]: Finished difference. Result has 253 places, 388 transitions, 7394 flow [2024-06-28 00:41:00,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7274, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7394, PETRI_PLACES=253, PETRI_TRANSITIONS=388} [2024-06-28 00:41:00,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-28 00:41:00,739 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 388 transitions, 7394 flow [2024-06-28 00:41:00,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:00,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:00,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:00,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:41:00,739 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:00,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1858718491, now seen corresponding path program 1 times [2024-06-28 00:41:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:00,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921750905] [2024-06-28 00:41:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:03,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:03,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921750905] [2024-06-28 00:41:03,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921750905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:03,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:03,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:41:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515459582] [2024-06-28 00:41:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:03,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:41:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:41:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:41:03,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:41:03,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 388 transitions, 7394 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:03,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:03,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:41:03,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:05,943 INFO L124 PetriNetUnfolderBase]: 4044/7054 cut-off events. [2024-06-28 00:41:05,944 INFO L125 PetriNetUnfolderBase]: For 346739/347036 co-relation queries the response was YES. [2024-06-28 00:41:05,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56202 conditions, 7054 events. 4044/7054 cut-off events. For 346739/347036 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51635 event pairs, 601 based on Foata normal form. 92/7014 useless extension candidates. Maximal degree in co-relation 56072. Up to 3754 conditions per place. [2024-06-28 00:41:06,027 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 139 changer transitions 0/443 dead transitions. [2024-06-28 00:41:06,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 443 transitions, 8462 flow [2024-06-28 00:41:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:41:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:41:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-28 00:41:06,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2024-06-28 00:41:06,029 INFO L175 Difference]: Start difference. First operand has 253 places, 388 transitions, 7394 flow. Second operand 10 states and 209 transitions. [2024-06-28 00:41:06,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 443 transitions, 8462 flow [2024-06-28 00:41:06,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 443 transitions, 8367 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 00:41:06,733 INFO L231 Difference]: Finished difference. Result has 257 places, 389 transitions, 7590 flow [2024-06-28 00:41:06,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7221, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7590, PETRI_PLACES=257, PETRI_TRANSITIONS=389} [2024-06-28 00:41:06,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-28 00:41:06,734 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 389 transitions, 7590 flow [2024-06-28 00:41:06,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:06,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:06,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:41:06,734 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:06,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash -527231034, now seen corresponding path program 1 times [2024-06-28 00:41:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:06,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139327305] [2024-06-28 00:41:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:06,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:11,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139327305] [2024-06-28 00:41:11,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139327305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:11,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:11,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:11,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408100263] [2024-06-28 00:41:11,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:11,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:11,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:11,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 389 transitions, 7590 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:11,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:11,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:11,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:14,164 INFO L124 PetriNetUnfolderBase]: 5031/8178 cut-off events. [2024-06-28 00:41:14,164 INFO L125 PetriNetUnfolderBase]: For 343269/343269 co-relation queries the response was YES. [2024-06-28 00:41:14,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63692 conditions, 8178 events. 5031/8178 cut-off events. For 343269/343269 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 55821 event pairs, 2304 based on Foata normal form. 2/8177 useless extension candidates. Maximal degree in co-relation 63561. Up to 7899 conditions per place. [2024-06-28 00:41:14,261 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 381 selfloop transitions, 16 changer transitions 0/402 dead transitions. [2024-06-28 00:41:14,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 402 transitions, 8450 flow [2024-06-28 00:41:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:41:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:41:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-28 00:41:14,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-28 00:41:14,262 INFO L175 Difference]: Start difference. First operand has 257 places, 389 transitions, 7590 flow. Second operand 7 states and 106 transitions. [2024-06-28 00:41:14,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 402 transitions, 8450 flow [2024-06-28 00:41:14,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 402 transitions, 8249 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:41:14,929 INFO L231 Difference]: Finished difference. Result has 258 places, 391 transitions, 7462 flow [2024-06-28 00:41:14,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7389, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7462, PETRI_PLACES=258, PETRI_TRANSITIONS=391} [2024-06-28 00:41:14,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-28 00:41:14,930 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 391 transitions, 7462 flow [2024-06-28 00:41:14,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:14,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:14,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:14,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:41:14,931 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:14,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1259210122, now seen corresponding path program 1 times [2024-06-28 00:41:14,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86251542] [2024-06-28 00:41:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:18,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:18,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86251542] [2024-06-28 00:41:18,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86251542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:18,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:18,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:41:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687673214] [2024-06-28 00:41:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:18,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:41:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:41:18,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:41:18,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:18,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 391 transitions, 7462 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:18,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:18,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:18,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:20,816 INFO L124 PetriNetUnfolderBase]: 5025/8175 cut-off events. [2024-06-28 00:41:20,816 INFO L125 PetriNetUnfolderBase]: For 339415/339421 co-relation queries the response was YES. [2024-06-28 00:41:20,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62627 conditions, 8175 events. 5025/8175 cut-off events. For 339415/339421 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55790 event pairs, 1859 based on Foata normal form. 8/8174 useless extension candidates. Maximal degree in co-relation 62496. Up to 7619 conditions per place. [2024-06-28 00:41:20,900 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 84 changer transitions 0/429 dead transitions. [2024-06-28 00:41:20,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 429 transitions, 8941 flow [2024-06-28 00:41:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:41:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:41:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 00:41:20,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-28 00:41:20,902 INFO L175 Difference]: Start difference. First operand has 258 places, 391 transitions, 7462 flow. Second operand 7 states and 132 transitions. [2024-06-28 00:41:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 429 transitions, 8941 flow [2024-06-28 00:41:21,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 429 transitions, 8884 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 00:41:21,714 INFO L231 Difference]: Finished difference. Result has 261 places, 402 transitions, 7837 flow [2024-06-28 00:41:21,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7405, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7837, PETRI_PLACES=261, PETRI_TRANSITIONS=402} [2024-06-28 00:41:21,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 00:41:21,715 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 402 transitions, 7837 flow [2024-06-28 00:41:21,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:21,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:21,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:21,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:41:21,715 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:21,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2016084286, now seen corresponding path program 2 times [2024-06-28 00:41:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:21,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633033523] [2024-06-28 00:41:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:21,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633033523] [2024-06-28 00:41:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633033523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:24,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:24,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:41:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755606934] [2024-06-28 00:41:24,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:24,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:41:24,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:41:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:41:25,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:25,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 402 transitions, 7837 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:25,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:25,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:25,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:27,441 INFO L124 PetriNetUnfolderBase]: 4996/8114 cut-off events. [2024-06-28 00:41:27,441 INFO L125 PetriNetUnfolderBase]: For 341845/341845 co-relation queries the response was YES. [2024-06-28 00:41:27,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62604 conditions, 8114 events. 4996/8114 cut-off events. For 341845/341845 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55044 event pairs, 1545 based on Foata normal form. 4/8106 useless extension candidates. Maximal degree in co-relation 62470. Up to 7644 conditions per place. [2024-06-28 00:41:27,538 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 76 changer transitions 0/430 dead transitions. [2024-06-28 00:41:27,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 430 transitions, 8876 flow [2024-06-28 00:41:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:41:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:41:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 00:41:27,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 00:41:27,539 INFO L175 Difference]: Start difference. First operand has 261 places, 402 transitions, 7837 flow. Second operand 8 states and 143 transitions. [2024-06-28 00:41:27,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 430 transitions, 8876 flow [2024-06-28 00:41:28,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 430 transitions, 8791 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-28 00:41:28,379 INFO L231 Difference]: Finished difference. Result has 267 places, 402 transitions, 7937 flow [2024-06-28 00:41:28,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7752, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7937, PETRI_PLACES=267, PETRI_TRANSITIONS=402} [2024-06-28 00:41:28,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-28 00:41:28,379 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 402 transitions, 7937 flow [2024-06-28 00:41:28,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:28,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:28,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:28,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:41:28,380 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:28,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash -619409528, now seen corresponding path program 1 times [2024-06-28 00:41:28,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:28,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816510792] [2024-06-28 00:41:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:32,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:32,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816510792] [2024-06-28 00:41:32,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816510792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:32,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:32,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:41:32,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358469868] [2024-06-28 00:41:32,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:32,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:41:32,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:32,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:41:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:41:32,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:32,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 402 transitions, 7937 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:32,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:32,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:32,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:34,632 INFO L124 PetriNetUnfolderBase]: 4995/8113 cut-off events. [2024-06-28 00:41:34,632 INFO L125 PetriNetUnfolderBase]: For 348390/348390 co-relation queries the response was YES. [2024-06-28 00:41:34,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62933 conditions, 8113 events. 4995/8113 cut-off events. For 348390/348390 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55213 event pairs, 1818 based on Foata normal form. 2/8112 useless extension candidates. Maximal degree in co-relation 62796. Up to 7660 conditions per place. [2024-06-28 00:41:34,740 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 347 selfloop transitions, 87 changer transitions 0/439 dead transitions. [2024-06-28 00:41:34,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 439 transitions, 9144 flow [2024-06-28 00:41:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:41:34,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 00:41:34,742 INFO L175 Difference]: Start difference. First operand has 267 places, 402 transitions, 7937 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:41:34,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 439 transitions, 9144 flow [2024-06-28 00:41:35,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 439 transitions, 9021 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:41:35,641 INFO L231 Difference]: Finished difference. Result has 273 places, 408 transitions, 8092 flow [2024-06-28 00:41:35,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8092, PETRI_PLACES=273, PETRI_TRANSITIONS=408} [2024-06-28 00:41:35,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 00:41:35,642 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 408 transitions, 8092 flow [2024-06-28 00:41:35,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:35,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:35,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:35,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:41:35,643 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:35,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:35,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1972219528, now seen corresponding path program 3 times [2024-06-28 00:41:35,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:35,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200102238] [2024-06-28 00:41:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:35,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:39,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:39,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200102238] [2024-06-28 00:41:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200102238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:39,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:39,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:41:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024809421] [2024-06-28 00:41:39,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:39,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:41:39,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:41:39,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:41:39,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:39,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 408 transitions, 8092 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:39,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:39,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:39,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:41,549 INFO L124 PetriNetUnfolderBase]: 4995/8111 cut-off events. [2024-06-28 00:41:41,549 INFO L125 PetriNetUnfolderBase]: For 359378/359378 co-relation queries the response was YES. [2024-06-28 00:41:41,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63092 conditions, 8111 events. 4995/8111 cut-off events. For 359378/359378 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 55125 event pairs, 1858 based on Foata normal form. 4/8106 useless extension candidates. Maximal degree in co-relation 62954. Up to 7578 conditions per place. [2024-06-28 00:41:41,634 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 87 changer transitions 0/435 dead transitions. [2024-06-28 00:41:41,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 435 transitions, 9327 flow [2024-06-28 00:41:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:41:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:41:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 00:41:41,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 00:41:41,636 INFO L175 Difference]: Start difference. First operand has 273 places, 408 transitions, 8092 flow. Second operand 7 states and 127 transitions. [2024-06-28 00:41:41,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 435 transitions, 9327 flow [2024-06-28 00:41:42,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 435 transitions, 9136 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:41:42,433 INFO L231 Difference]: Finished difference. Result has 274 places, 411 transitions, 8139 flow [2024-06-28 00:41:42,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7905, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8139, PETRI_PLACES=274, PETRI_TRANSITIONS=411} [2024-06-28 00:41:42,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-28 00:41:42,434 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 411 transitions, 8139 flow [2024-06-28 00:41:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:42,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:42,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:42,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:41:42,434 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:42,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1498539112, now seen corresponding path program 4 times [2024-06-28 00:41:42,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:42,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130394044] [2024-06-28 00:41:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:45,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:45,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130394044] [2024-06-28 00:41:45,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130394044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:45,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:45,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:41:45,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058498214] [2024-06-28 00:41:45,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:45,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:41:45,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:45,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:41:45,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:41:45,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:45,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 411 transitions, 8139 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:45,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:45,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:45,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:48,299 INFO L124 PetriNetUnfolderBase]: 5005/8127 cut-off events. [2024-06-28 00:41:48,299 INFO L125 PetriNetUnfolderBase]: For 354932/354932 co-relation queries the response was YES. [2024-06-28 00:41:48,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63227 conditions, 8127 events. 5005/8127 cut-off events. For 354932/354932 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 55245 event pairs, 1879 based on Foata normal form. 2/8120 useless extension candidates. Maximal degree in co-relation 63087. Up to 7588 conditions per place. [2024-06-28 00:41:48,401 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 98 changer transitions 0/435 dead transitions. [2024-06-28 00:41:48,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 435 transitions, 9376 flow [2024-06-28 00:41:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:41:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:41:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 00:41:48,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 00:41:48,402 INFO L175 Difference]: Start difference. First operand has 274 places, 411 transitions, 8139 flow. Second operand 7 states and 123 transitions. [2024-06-28 00:41:48,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 435 transitions, 9376 flow [2024-06-28 00:41:49,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 435 transitions, 9178 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:41:49,395 INFO L231 Difference]: Finished difference. Result has 278 places, 415 transitions, 8214 flow [2024-06-28 00:41:49,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7946, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8214, PETRI_PLACES=278, PETRI_TRANSITIONS=415} [2024-06-28 00:41:49,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-28 00:41:49,396 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 415 transitions, 8214 flow [2024-06-28 00:41:49,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:49,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:49,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:49,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:41:49,397 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:49,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1355426372, now seen corresponding path program 5 times [2024-06-28 00:41:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:49,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280982359] [2024-06-28 00:41:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:53,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:53,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280982359] [2024-06-28 00:41:53,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280982359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:53,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:53,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:41:53,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074182304] [2024-06-28 00:41:53,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:41:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:41:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:41:53,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:53,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 415 transitions, 8214 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:53,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:53,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:53,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:55,570 INFO L124 PetriNetUnfolderBase]: 4982/8106 cut-off events. [2024-06-28 00:41:55,570 INFO L125 PetriNetUnfolderBase]: For 359451/359451 co-relation queries the response was YES. [2024-06-28 00:41:55,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62977 conditions, 8106 events. 4982/8106 cut-off events. For 359451/359451 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 55044 event pairs, 1544 based on Foata normal form. 2/8096 useless extension candidates. Maximal degree in co-relation 62834. Up to 7524 conditions per place. [2024-06-28 00:41:55,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 108 changer transitions 0/442 dead transitions. [2024-06-28 00:41:55,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 442 transitions, 9420 flow [2024-06-28 00:41:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:41:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:41:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 00:41:55,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 00:41:55,669 INFO L175 Difference]: Start difference. First operand has 278 places, 415 transitions, 8214 flow. Second operand 8 states and 139 transitions. [2024-06-28 00:41:55,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 442 transitions, 9420 flow [2024-06-28 00:41:56,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 442 transitions, 9270 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 00:41:56,572 INFO L231 Difference]: Finished difference. Result has 284 places, 418 transitions, 8438 flow [2024-06-28 00:41:56,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8438, PETRI_PLACES=284, PETRI_TRANSITIONS=418} [2024-06-28 00:41:56,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 00:41:56,573 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 418 transitions, 8438 flow [2024-06-28 00:41:56,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:56,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:56,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:56,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:41:56,573 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:56,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1772803176, now seen corresponding path program 6 times [2024-06-28 00:41:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:56,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227500585] [2024-06-28 00:41:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:59,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:59,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227500585] [2024-06-28 00:41:59,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227500585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:59,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:59,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:41:59,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382132167] [2024-06-28 00:41:59,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:59,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:41:59,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:41:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:41:59,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:59,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 418 transitions, 8438 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:59,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:59,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:59,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:02,414 INFO L124 PetriNetUnfolderBase]: 4969/8083 cut-off events. [2024-06-28 00:42:02,415 INFO L125 PetriNetUnfolderBase]: For 369099/369099 co-relation queries the response was YES. [2024-06-28 00:42:02,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63281 conditions, 8083 events. 4969/8083 cut-off events. For 369099/369099 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 54899 event pairs, 1542 based on Foata normal form. 2/8073 useless extension candidates. Maximal degree in co-relation 63135. Up to 7500 conditions per place. [2024-06-28 00:42:02,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 112 changer transitions 0/448 dead transitions. [2024-06-28 00:42:02,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 448 transitions, 9692 flow [2024-06-28 00:42:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 00:42:02,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-28 00:42:02,509 INFO L175 Difference]: Start difference. First operand has 284 places, 418 transitions, 8438 flow. Second operand 10 states and 166 transitions. [2024-06-28 00:42:02,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 448 transitions, 9692 flow [2024-06-28 00:42:03,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 448 transitions, 9518 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:42:03,476 INFO L231 Difference]: Finished difference. Result has 289 places, 421 transitions, 8593 flow [2024-06-28 00:42:03,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8267, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8593, PETRI_PLACES=289, PETRI_TRANSITIONS=421} [2024-06-28 00:42:03,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-28 00:42:03,477 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 421 transitions, 8593 flow [2024-06-28 00:42:03,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:03,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:03,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:42:03,478 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:03,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1755311322, now seen corresponding path program 7 times [2024-06-28 00:42:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:03,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035112016] [2024-06-28 00:42:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:03,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:06,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:06,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035112016] [2024-06-28 00:42:06,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035112016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:06,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:06,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:42:06,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458819504] [2024-06-28 00:42:06,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:06,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:42:06,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:42:06,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:42:06,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:06,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 421 transitions, 8593 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:06,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:06,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:06,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:09,172 INFO L124 PetriNetUnfolderBase]: 4963/8074 cut-off events. [2024-06-28 00:42:09,172 INFO L125 PetriNetUnfolderBase]: For 376983/376986 co-relation queries the response was YES. [2024-06-28 00:42:09,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63303 conditions, 8074 events. 4963/8074 cut-off events. For 376983/376986 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 55082 event pairs, 1849 based on Foata normal form. 4/8073 useless extension candidates. Maximal degree in co-relation 63156. Up to 7529 conditions per place. [2024-06-28 00:42:09,277 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 363 selfloop transitions, 91 changer transitions 0/459 dead transitions. [2024-06-28 00:42:09,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 459 transitions, 9827 flow [2024-06-28 00:42:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:42:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:42:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 00:42:09,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-28 00:42:09,279 INFO L175 Difference]: Start difference. First operand has 289 places, 421 transitions, 8593 flow. Second operand 7 states and 142 transitions. [2024-06-28 00:42:09,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 459 transitions, 9827 flow [2024-06-28 00:42:10,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 459 transitions, 9577 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:10,301 INFO L231 Difference]: Finished difference. Result has 288 places, 423 transitions, 8560 flow [2024-06-28 00:42:10,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8560, PETRI_PLACES=288, PETRI_TRANSITIONS=423} [2024-06-28 00:42:10,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-28 00:42:10,302 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 423 transitions, 8560 flow [2024-06-28 00:42:10,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:10,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:10,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:10,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:42:10,302 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:10,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:10,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1467884810, now seen corresponding path program 8 times [2024-06-28 00:42:10,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:10,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081985519] [2024-06-28 00:42:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:13,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:13,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081985519] [2024-06-28 00:42:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081985519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:13,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:42:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865283783] [2024-06-28 00:42:13,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:13,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:42:13,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:13,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:42:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:42:13,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:13,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 423 transitions, 8560 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:13,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:13,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:13,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:15,592 INFO L124 PetriNetUnfolderBase]: 4940/8021 cut-off events. [2024-06-28 00:42:15,592 INFO L125 PetriNetUnfolderBase]: For 377726/377726 co-relation queries the response was YES. [2024-06-28 00:42:15,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62851 conditions, 8021 events. 4940/8021 cut-off events. For 377726/377726 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54451 event pairs, 1577 based on Foata normal form. 2/8020 useless extension candidates. Maximal degree in co-relation 62704. Up to 7542 conditions per place. [2024-06-28 00:42:15,679 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 368 selfloop transitions, 89 changer transitions 0/462 dead transitions. [2024-06-28 00:42:15,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 462 transitions, 9799 flow [2024-06-28 00:42:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:42:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:42:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:42:15,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:42:15,681 INFO L175 Difference]: Start difference. First operand has 288 places, 423 transitions, 8560 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:42:15,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 462 transitions, 9799 flow [2024-06-28 00:42:16,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 462 transitions, 9664 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:42:16,756 INFO L231 Difference]: Finished difference. Result has 293 places, 426 transitions, 8760 flow [2024-06-28 00:42:16,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8425, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8760, PETRI_PLACES=293, PETRI_TRANSITIONS=426} [2024-06-28 00:42:16,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-28 00:42:16,757 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 426 transitions, 8760 flow [2024-06-28 00:42:16,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:16,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:16,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:16,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:42:16,758 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:16,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1495691080, now seen corresponding path program 1 times [2024-06-28 00:42:16,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:16,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243040218] [2024-06-28 00:42:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:16,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:20,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:20,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243040218] [2024-06-28 00:42:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243040218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:20,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:20,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:42:20,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111687679] [2024-06-28 00:42:20,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:20,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:42:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:42:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:42:20,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:42:20,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 426 transitions, 8760 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:20,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:20,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:42:20,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:23,545 INFO L124 PetriNetUnfolderBase]: 4757/7875 cut-off events. [2024-06-28 00:42:23,545 INFO L125 PetriNetUnfolderBase]: For 420343/420385 co-relation queries the response was YES. [2024-06-28 00:42:23,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60788 conditions, 7875 events. 4757/7875 cut-off events. For 420343/420385 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 54960 event pairs, 2274 based on Foata normal form. 10/7852 useless extension candidates. Maximal degree in co-relation 60640. Up to 6846 conditions per place. [2024-06-28 00:42:23,631 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 329 selfloop transitions, 32 changer transitions 0/461 dead transitions. [2024-06-28 00:42:23,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 461 transitions, 9794 flow [2024-06-28 00:42:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:42:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:42:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:42:23,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:42:23,632 INFO L175 Difference]: Start difference. First operand has 293 places, 426 transitions, 8760 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:42:23,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 461 transitions, 9794 flow [2024-06-28 00:42:24,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 461 transitions, 9673 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:42:24,574 INFO L231 Difference]: Finished difference. Result has 296 places, 429 transitions, 8760 flow [2024-06-28 00:42:24,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8639, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8760, PETRI_PLACES=296, PETRI_TRANSITIONS=429} [2024-06-28 00:42:24,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-28 00:42:24,575 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 429 transitions, 8760 flow [2024-06-28 00:42:24,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:24,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:24,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:24,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:42:24,576 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:24,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1495751530, now seen corresponding path program 2 times [2024-06-28 00:42:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:24,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718482188] [2024-06-28 00:42:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:24,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:28,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:28,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718482188] [2024-06-28 00:42:28,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718482188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:28,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:28,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:28,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609796779] [2024-06-28 00:42:28,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:28,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:28,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:28,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:28,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:28,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:42:28,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 429 transitions, 8760 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:28,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:28,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:42:28,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:31,480 INFO L124 PetriNetUnfolderBase]: 4806/7948 cut-off events. [2024-06-28 00:42:31,481 INFO L125 PetriNetUnfolderBase]: For 438460/438502 co-relation queries the response was YES. [2024-06-28 00:42:31,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61381 conditions, 7948 events. 4806/7948 cut-off events. For 438460/438502 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 55804 event pairs, 2327 based on Foata normal form. 14/7929 useless extension candidates. Maximal degree in co-relation 61232. Up to 7016 conditions per place. [2024-06-28 00:42:31,568 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 326 selfloop transitions, 30 changer transitions 0/456 dead transitions. [2024-06-28 00:42:31,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 456 transitions, 9642 flow [2024-06-28 00:42:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:42:31,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:42:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 00:42:31,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 00:42:31,569 INFO L175 Difference]: Start difference. First operand has 296 places, 429 transitions, 8760 flow. Second operand 8 states and 138 transitions. [2024-06-28 00:42:31,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 456 transitions, 9642 flow [2024-06-28 00:42:32,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 456 transitions, 9584 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 00:42:32,615 INFO L231 Difference]: Finished difference. Result has 300 places, 431 transitions, 8809 flow [2024-06-28 00:42:32,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8708, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8809, PETRI_PLACES=300, PETRI_TRANSITIONS=431} [2024-06-28 00:42:32,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-28 00:42:32,616 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 431 transitions, 8809 flow [2024-06-28 00:42:32,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:32,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:32,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:42:32,617 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:32,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:32,617 INFO L85 PathProgramCache]: Analyzing trace with hash 829028330, now seen corresponding path program 3 times [2024-06-28 00:42:32,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:32,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251943479] [2024-06-28 00:42:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:32,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:39,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:39,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251943479] [2024-06-28 00:42:39,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251943479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:39,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:39,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:39,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018351337] [2024-06-28 00:42:39,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:39,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:39,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:39,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:39,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:39,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 431 transitions, 8809 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:39,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:39,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:39,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:41,485 INFO L124 PetriNetUnfolderBase]: 5133/8308 cut-off events. [2024-06-28 00:42:41,485 INFO L125 PetriNetUnfolderBase]: For 446024/446024 co-relation queries the response was YES. [2024-06-28 00:42:41,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65367 conditions, 8308 events. 5133/8308 cut-off events. For 446024/446024 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 56634 event pairs, 2367 based on Foata normal form. 14/8319 useless extension candidates. Maximal degree in co-relation 65217. Up to 7975 conditions per place. [2024-06-28 00:42:41,589 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 23 changer transitions 0/455 dead transitions. [2024-06-28 00:42:41,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 455 transitions, 9881 flow [2024-06-28 00:42:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:42:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:42:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 00:42:41,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 00:42:41,590 INFO L175 Difference]: Start difference. First operand has 300 places, 431 transitions, 8809 flow. Second operand 8 states and 126 transitions. [2024-06-28 00:42:41,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 455 transitions, 9881 flow [2024-06-28 00:42:42,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 455 transitions, 9784 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 00:42:42,778 INFO L231 Difference]: Finished difference. Result has 302 places, 436 transitions, 8861 flow [2024-06-28 00:42:42,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8721, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8861, PETRI_PLACES=302, PETRI_TRANSITIONS=436} [2024-06-28 00:42:42,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 00:42:42,778 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 436 transitions, 8861 flow [2024-06-28 00:42:42,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:42,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:42,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:42,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:42:42,779 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:42,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:42,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2125317483, now seen corresponding path program 1 times [2024-06-28 00:42:42,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:42,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165805095] [2024-06-28 00:42:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:42,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:46,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:46,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165805095] [2024-06-28 00:42:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165805095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:46,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:46,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489791131] [2024-06-28 00:42:46,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:46,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:46,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:46,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:46,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 436 transitions, 8861 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:46,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:46,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:46,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:48,877 INFO L124 PetriNetUnfolderBase]: 5195/8404 cut-off events. [2024-06-28 00:42:48,877 INFO L125 PetriNetUnfolderBase]: For 448066/448069 co-relation queries the response was YES. [2024-06-28 00:42:48,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66462 conditions, 8404 events. 5195/8404 cut-off events. For 448066/448069 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 57195 event pairs, 1905 based on Foata normal form. 8/8407 useless extension candidates. Maximal degree in co-relation 66311. Up to 7658 conditions per place. [2024-06-28 00:42:48,975 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 356 selfloop transitions, 134 changer transitions 0/495 dead transitions. [2024-06-28 00:42:48,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 495 transitions, 10561 flow [2024-06-28 00:42:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:42:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:42:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-28 00:42:48,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-28 00:42:48,977 INFO L175 Difference]: Start difference. First operand has 302 places, 436 transitions, 8861 flow. Second operand 11 states and 194 transitions. [2024-06-28 00:42:48,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 495 transitions, 10561 flow [2024-06-28 00:42:50,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 495 transitions, 10498 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:42:50,249 INFO L231 Difference]: Finished difference. Result has 311 places, 453 transitions, 9400 flow [2024-06-28 00:42:50,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8798, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9400, PETRI_PLACES=311, PETRI_TRANSITIONS=453} [2024-06-28 00:42:50,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-28 00:42:50,250 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 453 transitions, 9400 flow [2024-06-28 00:42:50,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:50,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:50,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:42:50,250 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:50,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:50,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1934860761, now seen corresponding path program 2 times [2024-06-28 00:42:50,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:50,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088578165] [2024-06-28 00:42:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:50,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:53,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:53,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088578165] [2024-06-28 00:42:53,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088578165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:53,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:53,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:53,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092690959] [2024-06-28 00:42:53,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:53,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:53,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:53,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:53,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:53,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 453 transitions, 9400 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:53,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:53,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:53,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:56,873 INFO L124 PetriNetUnfolderBase]: 5305/8584 cut-off events. [2024-06-28 00:42:56,874 INFO L125 PetriNetUnfolderBase]: For 499198/499198 co-relation queries the response was YES. [2024-06-28 00:42:56,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70402 conditions, 8584 events. 5305/8584 cut-off events. For 499198/499198 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58560 event pairs, 1694 based on Foata normal form. 4/8585 useless extension candidates. Maximal degree in co-relation 70248. Up to 7833 conditions per place. [2024-06-28 00:42:56,974 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 363 selfloop transitions, 148 changer transitions 0/516 dead transitions. [2024-06-28 00:42:56,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 516 transitions, 11121 flow [2024-06-28 00:42:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:42:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:42:56,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-28 00:42:56,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-28 00:42:56,975 INFO L175 Difference]: Start difference. First operand has 311 places, 453 transitions, 9400 flow. Second operand 11 states and 194 transitions. [2024-06-28 00:42:56,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 516 transitions, 11121 flow [2024-06-28 00:42:58,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 516 transitions, 10688 flow, removed 146 selfloop flow, removed 5 redundant places. [2024-06-28 00:42:58,338 INFO L231 Difference]: Finished difference. Result has 319 places, 476 transitions, 9718 flow [2024-06-28 00:42:58,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9077, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9718, PETRI_PLACES=319, PETRI_TRANSITIONS=476} [2024-06-28 00:42:58,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 00:42:58,339 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 476 transitions, 9718 flow [2024-06-28 00:42:58,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:58,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:58,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:58,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:42:58,340 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:58,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:58,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2129036553, now seen corresponding path program 3 times [2024-06-28 00:42:58,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:58,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068384745] [2024-06-28 00:42:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:58,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068384745] [2024-06-28 00:43:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068384745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974952685] [2024-06-28 00:43:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:01,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:01,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:01,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 476 transitions, 9718 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:01,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:01,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:01,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:04,743 INFO L124 PetriNetUnfolderBase]: 5355/8654 cut-off events. [2024-06-28 00:43:04,743 INFO L125 PetriNetUnfolderBase]: For 519890/519890 co-relation queries the response was YES. [2024-06-28 00:43:04,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71963 conditions, 8654 events. 5355/8654 cut-off events. For 519890/519890 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 58921 event pairs, 1710 based on Foata normal form. 10/8661 useless extension candidates. Maximal degree in co-relation 71807. Up to 7826 conditions per place. [2024-06-28 00:43:04,854 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 349 selfloop transitions, 176 changer transitions 0/530 dead transitions. [2024-06-28 00:43:04,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 530 transitions, 11441 flow [2024-06-28 00:43:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:43:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:43:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 00:43:04,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 00:43:04,856 INFO L175 Difference]: Start difference. First operand has 319 places, 476 transitions, 9718 flow. Second operand 10 states and 185 transitions. [2024-06-28 00:43:04,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 530 transitions, 11441 flow [2024-06-28 00:43:06,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 530 transitions, 11202 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 00:43:06,166 INFO L231 Difference]: Finished difference. Result has 324 places, 488 transitions, 10126 flow [2024-06-28 00:43:06,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9493, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10126, PETRI_PLACES=324, PETRI_TRANSITIONS=488} [2024-06-28 00:43:06,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-28 00:43:06,167 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 488 transitions, 10126 flow [2024-06-28 00:43:06,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:06,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:06,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:06,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:43:06,167 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:06,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2021824887, now seen corresponding path program 1 times [2024-06-28 00:43:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210957431] [2024-06-28 00:43:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:06,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:10,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:10,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210957431] [2024-06-28 00:43:10,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210957431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:10,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:10,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:43:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19712017] [2024-06-28 00:43:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:10,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:43:10,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:43:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:43:10,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:10,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 488 transitions, 10126 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:10,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:10,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:10,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:13,199 INFO L124 PetriNetUnfolderBase]: 5399/8695 cut-off events. [2024-06-28 00:43:13,199 INFO L125 PetriNetUnfolderBase]: For 544438/544438 co-relation queries the response was YES. [2024-06-28 00:43:13,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74103 conditions, 8695 events. 5399/8695 cut-off events. For 544438/544438 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 58966 event pairs, 1893 based on Foata normal form. 12/8704 useless extension candidates. Maximal degree in co-relation 73944. Up to 8172 conditions per place. [2024-06-28 00:43:13,310 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 425 selfloop transitions, 96 changer transitions 0/526 dead transitions. [2024-06-28 00:43:13,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 526 transitions, 11522 flow [2024-06-28 00:43:13,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:43:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:43:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 00:43:13,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 00:43:13,311 INFO L175 Difference]: Start difference. First operand has 324 places, 488 transitions, 10126 flow. Second operand 10 states and 177 transitions. [2024-06-28 00:43:13,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 526 transitions, 11522 flow [2024-06-28 00:43:14,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 526 transitions, 11274 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 00:43:14,427 INFO L231 Difference]: Finished difference. Result has 328 places, 489 transitions, 10103 flow [2024-06-28 00:43:14,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9878, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10103, PETRI_PLACES=328, PETRI_TRANSITIONS=489} [2024-06-28 00:43:14,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-28 00:43:14,428 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 489 transitions, 10103 flow [2024-06-28 00:43:14,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:14,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:14,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:14,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:43:14,428 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:14,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -265033599, now seen corresponding path program 1 times [2024-06-28 00:43:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:14,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775725059] [2024-06-28 00:43:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:14,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:18,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:18,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775725059] [2024-06-28 00:43:18,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775725059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:18,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:18,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:18,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632012789] [2024-06-28 00:43:18,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:18,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:18,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:18,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:18,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 489 transitions, 10103 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:18,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:18,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:18,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:21,406 INFO L124 PetriNetUnfolderBase]: 5393/8685 cut-off events. [2024-06-28 00:43:21,407 INFO L125 PetriNetUnfolderBase]: For 536425/536425 co-relation queries the response was YES. [2024-06-28 00:43:21,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73814 conditions, 8685 events. 5393/8685 cut-off events. For 536425/536425 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 59062 event pairs, 2192 based on Foata normal form. 2/8684 useless extension candidates. Maximal degree in co-relation 73654. Up to 8339 conditions per place. [2024-06-28 00:43:21,519 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 50 changer transitions 0/512 dead transitions. [2024-06-28 00:43:21,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 512 transitions, 11233 flow [2024-06-28 00:43:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:43:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:43:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 00:43:21,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 00:43:21,520 INFO L175 Difference]: Start difference. First operand has 328 places, 489 transitions, 10103 flow. Second operand 7 states and 125 transitions. [2024-06-28 00:43:21,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 512 transitions, 11233 flow [2024-06-28 00:43:23,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 512 transitions, 10979 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-28 00:43:23,035 INFO L231 Difference]: Finished difference. Result has 326 places, 489 transitions, 9977 flow [2024-06-28 00:43:23,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9849, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9977, PETRI_PLACES=326, PETRI_TRANSITIONS=489} [2024-06-28 00:43:23,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 00:43:23,035 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 489 transitions, 9977 flow [2024-06-28 00:43:23,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:23,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:23,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:23,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:43:23,036 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:23,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1117430519, now seen corresponding path program 4 times [2024-06-28 00:43:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:23,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968073681] [2024-06-28 00:43:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968073681] [2024-06-28 00:43:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968073681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:26,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:26,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734659191] [2024-06-28 00:43:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:26,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:26,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:26,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 489 transitions, 9977 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:26,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:26,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:26,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:29,713 INFO L124 PetriNetUnfolderBase]: 5459/8788 cut-off events. [2024-06-28 00:43:29,713 INFO L125 PetriNetUnfolderBase]: For 553963/553963 co-relation queries the response was YES. [2024-06-28 00:43:29,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74493 conditions, 8788 events. 5459/8788 cut-off events. For 553963/553963 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 59708 event pairs, 1907 based on Foata normal form. 6/8785 useless extension candidates. Maximal degree in co-relation 74331. Up to 7957 conditions per place. [2024-06-28 00:43:29,805 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 162 changer transitions 0/546 dead transitions. [2024-06-28 00:43:29,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 546 transitions, 11909 flow [2024-06-28 00:43:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:43:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:43:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-28 00:43:29,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-28 00:43:29,807 INFO L175 Difference]: Start difference. First operand has 326 places, 489 transitions, 9977 flow. Second operand 11 states and 190 transitions. [2024-06-28 00:43:29,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 546 transitions, 11909 flow [2024-06-28 00:43:31,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 546 transitions, 11835 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:43:31,088 INFO L231 Difference]: Finished difference. Result has 335 places, 509 transitions, 10565 flow [2024-06-28 00:43:31,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9903, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10565, PETRI_PLACES=335, PETRI_TRANSITIONS=509} [2024-06-28 00:43:31,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-28 00:43:31,088 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 509 transitions, 10565 flow [2024-06-28 00:43:31,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:31,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:31,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:31,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:43:31,089 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:31,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:31,089 INFO L85 PathProgramCache]: Analyzing trace with hash -654583239, now seen corresponding path program 5 times [2024-06-28 00:43:31,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:31,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682599025] [2024-06-28 00:43:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:31,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:35,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:35,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682599025] [2024-06-28 00:43:35,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682599025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:35,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:35,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:35,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292938415] [2024-06-28 00:43:35,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:35,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:35,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:35,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:35,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 509 transitions, 10565 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:35,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:35,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:35,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:38,422 INFO L124 PetriNetUnfolderBase]: 5489/8846 cut-off events. [2024-06-28 00:43:38,423 INFO L125 PetriNetUnfolderBase]: For 594311/594311 co-relation queries the response was YES. [2024-06-28 00:43:38,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77196 conditions, 8846 events. 5489/8846 cut-off events. For 594311/594311 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 60287 event pairs, 2344 based on Foata normal form. 6/8849 useless extension candidates. Maximal degree in co-relation 77031. Up to 8429 conditions per place. [2024-06-28 00:43:38,520 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 48 changer transitions 0/538 dead transitions. [2024-06-28 00:43:38,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 538 transitions, 11924 flow [2024-06-28 00:43:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:43:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:43:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 00:43:38,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 00:43:38,522 INFO L175 Difference]: Start difference. First operand has 335 places, 509 transitions, 10565 flow. Second operand 7 states and 125 transitions. [2024-06-28 00:43:38,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 538 transitions, 11924 flow [2024-06-28 00:43:39,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 538 transitions, 11584 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 00:43:39,624 INFO L231 Difference]: Finished difference. Result has 336 places, 515 transitions, 10442 flow [2024-06-28 00:43:39,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10247, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10442, PETRI_PLACES=336, PETRI_TRANSITIONS=515} [2024-06-28 00:43:39,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-28 00:43:39,624 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 515 transitions, 10442 flow [2024-06-28 00:43:39,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:39,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:39,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:43:39,625 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:39,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash -789926549, now seen corresponding path program 6 times [2024-06-28 00:43:39,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:39,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361828018] [2024-06-28 00:43:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361828018] [2024-06-28 00:43:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361828018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:43,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:43,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325459266] [2024-06-28 00:43:43,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:43,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:43,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:43,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:43,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 515 transitions, 10442 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:43,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:43,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:43,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:47,111 INFO L124 PetriNetUnfolderBase]: 5540/8911 cut-off events. [2024-06-28 00:43:47,111 INFO L125 PetriNetUnfolderBase]: For 609227/609227 co-relation queries the response was YES. [2024-06-28 00:43:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77538 conditions, 8911 events. 5540/8911 cut-off events. For 609227/609227 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 60544 event pairs, 1884 based on Foata normal form. 6/8907 useless extension candidates. Maximal degree in co-relation 77372. Up to 8023 conditions per place. [2024-06-28 00:43:47,217 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 379 selfloop transitions, 208 changer transitions 0/592 dead transitions. [2024-06-28 00:43:47,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 592 transitions, 12687 flow [2024-06-28 00:43:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:43:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:43:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 228 transitions. [2024-06-28 00:43:47,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 00:43:47,219 INFO L175 Difference]: Start difference. First operand has 336 places, 515 transitions, 10442 flow. Second operand 14 states and 228 transitions. [2024-06-28 00:43:47,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 592 transitions, 12687 flow [2024-06-28 00:43:48,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 592 transitions, 12542 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 00:43:48,729 INFO L231 Difference]: Finished difference. Result has 349 places, 554 transitions, 11326 flow [2024-06-28 00:43:48,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10320, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11326, PETRI_PLACES=349, PETRI_TRANSITIONS=554} [2024-06-28 00:43:48,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-28 00:43:48,730 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 554 transitions, 11326 flow [2024-06-28 00:43:48,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:48,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:48,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:48,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:43:48,730 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:48,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1968993017, now seen corresponding path program 7 times [2024-06-28 00:43:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:48,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786979944] [2024-06-28 00:43:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786979944] [2024-06-28 00:43:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786979944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:53,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:53,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806909429] [2024-06-28 00:43:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:53,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:53,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:53,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 554 transitions, 11326 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:53,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:53,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:53,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:56,267 INFO L124 PetriNetUnfolderBase]: 5542/8914 cut-off events. [2024-06-28 00:43:56,268 INFO L125 PetriNetUnfolderBase]: For 627232/627232 co-relation queries the response was YES. [2024-06-28 00:43:56,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78997 conditions, 8914 events. 5542/8914 cut-off events. For 627232/627232 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 60770 event pairs, 2373 based on Foata normal form. 2/8913 useless extension candidates. Maximal degree in co-relation 78827. Up to 8575 conditions per place. [2024-06-28 00:43:56,369 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 534 selfloop transitions, 42 changer transitions 0/581 dead transitions. [2024-06-28 00:43:56,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 581 transitions, 12794 flow [2024-06-28 00:43:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:43:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:43:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 00:43:56,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 00:43:56,370 INFO L175 Difference]: Start difference. First operand has 349 places, 554 transitions, 11326 flow. Second operand 8 states and 129 transitions. [2024-06-28 00:43:56,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 581 transitions, 12794 flow [2024-06-28 00:43:57,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 581 transitions, 12358 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-28 00:43:57,573 INFO L231 Difference]: Finished difference. Result has 351 places, 565 transitions, 11218 flow [2024-06-28 00:43:57,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10904, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11218, PETRI_PLACES=351, PETRI_TRANSITIONS=565} [2024-06-28 00:43:57,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-28 00:43:57,573 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 565 transitions, 11218 flow [2024-06-28 00:43:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:57,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:57,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:43:57,574 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:57,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash -477970457, now seen corresponding path program 8 times [2024-06-28 00:43:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:57,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034859848] [2024-06-28 00:43:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:01,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034859848] [2024-06-28 00:44:01,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034859848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:01,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:01,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:44:01,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091356482] [2024-06-28 00:44:01,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:01,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:44:01,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:01,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:44:01,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:44:01,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:01,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 565 transitions, 11218 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:01,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:01,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:01,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:04,845 INFO L124 PetriNetUnfolderBase]: 5600/9000 cut-off events. [2024-06-28 00:44:04,845 INFO L125 PetriNetUnfolderBase]: For 657119/657119 co-relation queries the response was YES. [2024-06-28 00:44:04,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80083 conditions, 9000 events. 5600/9000 cut-off events. For 657119/657119 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 61420 event pairs, 2372 based on Foata normal form. 2/8999 useless extension candidates. Maximal degree in co-relation 79911. Up to 8575 conditions per place. [2024-06-28 00:44:04,968 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 531 selfloop transitions, 67 changer transitions 0/603 dead transitions. [2024-06-28 00:44:04,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 603 transitions, 13027 flow [2024-06-28 00:44:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:44:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:44:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 00:44:04,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-28 00:44:04,969 INFO L175 Difference]: Start difference. First operand has 351 places, 565 transitions, 11218 flow. Second operand 9 states and 140 transitions. [2024-06-28 00:44:04,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 603 transitions, 13027 flow [2024-06-28 00:44:06,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 603 transitions, 12887 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-28 00:44:06,564 INFO L231 Difference]: Finished difference. Result has 357 places, 582 transitions, 11594 flow [2024-06-28 00:44:06,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11078, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11594, PETRI_PLACES=357, PETRI_TRANSITIONS=582} [2024-06-28 00:44:06,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-28 00:44:06,564 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 582 transitions, 11594 flow [2024-06-28 00:44:06,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:06,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:06,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:06,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:44:06,565 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:06,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:06,565 INFO L85 PathProgramCache]: Analyzing trace with hash -671021717, now seen corresponding path program 9 times [2024-06-28 00:44:06,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:06,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92384662] [2024-06-28 00:44:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:06,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:10,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:10,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92384662] [2024-06-28 00:44:10,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92384662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:10,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:10,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:44:10,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194175531] [2024-06-28 00:44:10,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:10,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:44:10,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:44:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:44:10,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:10,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 582 transitions, 11594 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:10,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:10,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:10,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:13,173 INFO L124 PetriNetUnfolderBase]: 5597/9016 cut-off events. [2024-06-28 00:44:13,173 INFO L125 PetriNetUnfolderBase]: For 671999/671999 co-relation queries the response was YES. [2024-06-28 00:44:13,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80796 conditions, 9016 events. 5597/9016 cut-off events. For 671999/671999 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 61520 event pairs, 1679 based on Foata normal form. 1/9008 useless extension candidates. Maximal degree in co-relation 80621. Up to 8045 conditions per place. [2024-06-28 00:44:13,308 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 414 selfloop transitions, 231 changer transitions 0/650 dead transitions. [2024-06-28 00:44:13,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 650 transitions, 14306 flow [2024-06-28 00:44:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:44:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:44:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:44:13,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 00:44:13,309 INFO L175 Difference]: Start difference. First operand has 357 places, 582 transitions, 11594 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:44:13,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 650 transitions, 14306 flow [2024-06-28 00:44:15,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 650 transitions, 14152 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 00:44:15,070 INFO L231 Difference]: Finished difference. Result has 361 places, 604 transitions, 12548 flow [2024-06-28 00:44:15,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11440, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12548, PETRI_PLACES=361, PETRI_TRANSITIONS=604} [2024-06-28 00:44:15,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-28 00:44:15,071 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 604 transitions, 12548 flow [2024-06-28 00:44:15,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:15,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:15,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:44:15,072 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:15,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash -184684389, now seen corresponding path program 10 times [2024-06-28 00:44:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:15,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678643969] [2024-06-28 00:44:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:15,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:18,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:18,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678643969] [2024-06-28 00:44:18,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678643969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:18,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:18,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:44:18,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329800880] [2024-06-28 00:44:18,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:18,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:44:18,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:44:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:44:18,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:18,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 604 transitions, 12548 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:18,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:18,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:18,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:21,865 INFO L124 PetriNetUnfolderBase]: 5729/9193 cut-off events. [2024-06-28 00:44:21,866 INFO L125 PetriNetUnfolderBase]: For 730160/730160 co-relation queries the response was YES. [2024-06-28 00:44:21,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84505 conditions, 9193 events. 5729/9193 cut-off events. For 730160/730160 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 62483 event pairs, 1728 based on Foata normal form. 6/9190 useless extension candidates. Maximal degree in co-relation 84328. Up to 8097 conditions per place. [2024-06-28 00:44:21,996 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 257 changer transitions 0/682 dead transitions. [2024-06-28 00:44:21,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 682 transitions, 15376 flow [2024-06-28 00:44:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:44:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:44:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-28 00:44:21,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-28 00:44:21,997 INFO L175 Difference]: Start difference. First operand has 361 places, 604 transitions, 12548 flow. Second operand 11 states and 200 transitions. [2024-06-28 00:44:21,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 682 transitions, 15376 flow [2024-06-28 00:44:24,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 682 transitions, 15019 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-28 00:44:24,140 INFO L231 Difference]: Finished difference. Result has 367 places, 628 transitions, 13126 flow [2024-06-28 00:44:24,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12244, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13126, PETRI_PLACES=367, PETRI_TRANSITIONS=628} [2024-06-28 00:44:24,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-28 00:44:24,140 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 628 transitions, 13126 flow [2024-06-28 00:44:24,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:24,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:24,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:24,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:44:24,141 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:24,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash -877467767, now seen corresponding path program 11 times [2024-06-28 00:44:24,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:24,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696989187] [2024-06-28 00:44:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:27,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:27,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696989187] [2024-06-28 00:44:27,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696989187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:27,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:27,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:44:27,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692650661] [2024-06-28 00:44:27,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:27,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:44:27,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:27,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:44:27,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:44:27,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:27,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 628 transitions, 13126 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:27,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:27,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:27,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:31,351 INFO L124 PetriNetUnfolderBase]: 5723/9185 cut-off events. [2024-06-28 00:44:31,352 INFO L125 PetriNetUnfolderBase]: For 734311/734311 co-relation queries the response was YES. [2024-06-28 00:44:31,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84493 conditions, 9185 events. 5723/9185 cut-off events. For 734311/734311 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 62379 event pairs, 1695 based on Foata normal form. 2/9178 useless extension candidates. Maximal degree in co-relation 84316. Up to 8170 conditions per place. [2024-06-28 00:44:31,476 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 429 selfloop transitions, 249 changer transitions 0/683 dead transitions. [2024-06-28 00:44:31,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 683 transitions, 15544 flow [2024-06-28 00:44:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:44:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:44:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-28 00:44:31,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 00:44:31,478 INFO L175 Difference]: Start difference. First operand has 367 places, 628 transitions, 13126 flow. Second operand 12 states and 212 transitions. [2024-06-28 00:44:31,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 683 transitions, 15544 flow [2024-06-28 00:44:33,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 683 transitions, 15110 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-28 00:44:33,671 INFO L231 Difference]: Finished difference. Result has 373 places, 634 transitions, 13331 flow [2024-06-28 00:44:33,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12738, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13331, PETRI_PLACES=373, PETRI_TRANSITIONS=634} [2024-06-28 00:44:33,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-28 00:44:33,672 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 634 transitions, 13331 flow [2024-06-28 00:44:33,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:33,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:33,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:33,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:44:33,672 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:33,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash 215028247, now seen corresponding path program 2 times [2024-06-28 00:44:33,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:33,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288687104] [2024-06-28 00:44:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:33,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:39,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:39,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288687104] [2024-06-28 00:44:39,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288687104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:39,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:39,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:44:39,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312440227] [2024-06-28 00:44:39,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:39,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:44:39,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:39,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:44:39,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:44:39,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:39,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 634 transitions, 13331 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:39,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:39,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:39,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:42,274 INFO L124 PetriNetUnfolderBase]: 5731/9183 cut-off events. [2024-06-28 00:44:42,274 INFO L125 PetriNetUnfolderBase]: For 749511/749511 co-relation queries the response was YES. [2024-06-28 00:44:42,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84496 conditions, 9183 events. 5731/9183 cut-off events. For 749511/749511 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 62557 event pairs, 2269 based on Foata normal form. 2/9182 useless extension candidates. Maximal degree in co-relation 84318. Up to 8877 conditions per place. [2024-06-28 00:44:42,408 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 619 selfloop transitions, 24 changer transitions 0/648 dead transitions. [2024-06-28 00:44:42,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 648 transitions, 14701 flow [2024-06-28 00:44:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:44:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:44:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 00:44:42,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 00:44:42,409 INFO L175 Difference]: Start difference. First operand has 373 places, 634 transitions, 13331 flow. Second operand 7 states and 112 transitions. [2024-06-28 00:44:42,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 648 transitions, 14701 flow [2024-06-28 00:44:44,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 648 transitions, 14360 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 00:44:44,561 INFO L231 Difference]: Finished difference. Result has 374 places, 636 transitions, 13095 flow [2024-06-28 00:44:44,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12990, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13095, PETRI_PLACES=374, PETRI_TRANSITIONS=636} [2024-06-28 00:44:44,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-28 00:44:44,562 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 636 transitions, 13095 flow [2024-06-28 00:44:44,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:44,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:44,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:44,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:44:44,562 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:44,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash -463677721, now seen corresponding path program 3 times [2024-06-28 00:44:44,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305792777] [2024-06-28 00:44:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:49,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:49,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305792777] [2024-06-28 00:44:49,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305792777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:49,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:49,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:44:49,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645705007] [2024-06-28 00:44:49,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:49,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:44:49,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:49,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:44:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:44:49,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:49,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 636 transitions, 13095 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:49,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:49,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:49,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:53,090 INFO L124 PetriNetUnfolderBase]: 5826/9336 cut-off events. [2024-06-28 00:44:53,091 INFO L125 PetriNetUnfolderBase]: For 810287/810287 co-relation queries the response was YES. [2024-06-28 00:44:53,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85746 conditions, 9336 events. 5826/9336 cut-off events. For 810287/810287 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 63745 event pairs, 2274 based on Foata normal form. 8/9341 useless extension candidates. Maximal degree in co-relation 85569. Up to 8898 conditions per place. [2024-06-28 00:44:53,225 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 624 selfloop transitions, 34 changer transitions 0/663 dead transitions. [2024-06-28 00:44:53,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 663 transitions, 14780 flow [2024-06-28 00:44:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:44:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:44:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 00:44:53,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-28 00:44:53,227 INFO L175 Difference]: Start difference. First operand has 374 places, 636 transitions, 13095 flow. Second operand 9 states and 142 transitions. [2024-06-28 00:44:53,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 663 transitions, 14780 flow [2024-06-28 00:44:55,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 663 transitions, 14670 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 00:44:55,653 INFO L231 Difference]: Finished difference. Result has 379 places, 640 transitions, 13150 flow [2024-06-28 00:44:55,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12985, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13150, PETRI_PLACES=379, PETRI_TRANSITIONS=640} [2024-06-28 00:44:55,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-28 00:44:55,654 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 640 transitions, 13150 flow [2024-06-28 00:44:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:55,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:55,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:55,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:44:55,655 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:55,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:55,656 INFO L85 PathProgramCache]: Analyzing trace with hash -877459831, now seen corresponding path program 4 times [2024-06-28 00:44:55,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:55,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053001472] [2024-06-28 00:44:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:55,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:59,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053001472] [2024-06-28 00:44:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053001472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:59,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:59,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:44:59,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119293271] [2024-06-28 00:44:59,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:59,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:44:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:44:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:44:59,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:59,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 640 transitions, 13150 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:59,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:59,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:59,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:03,141 INFO L124 PetriNetUnfolderBase]: 5893/9440 cut-off events. [2024-06-28 00:45:03,142 INFO L125 PetriNetUnfolderBase]: For 832452/832452 co-relation queries the response was YES. [2024-06-28 00:45:03,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86528 conditions, 9440 events. 5893/9440 cut-off events. For 832452/832452 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 64214 event pairs, 1806 based on Foata normal form. 12/9443 useless extension candidates. Maximal degree in co-relation 86349. Up to 8862 conditions per place. [2024-06-28 00:45:03,276 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 573 selfloop transitions, 93 changer transitions 0/671 dead transitions. [2024-06-28 00:45:03,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 671 transitions, 14714 flow [2024-06-28 00:45:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:45:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:45:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 00:45:03,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 00:45:03,277 INFO L175 Difference]: Start difference. First operand has 379 places, 640 transitions, 13150 flow. Second operand 9 states and 159 transitions. [2024-06-28 00:45:03,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 671 transitions, 14714 flow [2024-06-28 00:45:05,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 671 transitions, 14659 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 00:45:05,791 INFO L231 Difference]: Finished difference. Result has 383 places, 643 transitions, 13365 flow [2024-06-28 00:45:05,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13095, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13365, PETRI_PLACES=383, PETRI_TRANSITIONS=643} [2024-06-28 00:45:05,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-28 00:45:05,791 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 643 transitions, 13365 flow [2024-06-28 00:45:05,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:05,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:05,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:05,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:45:05,792 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:05,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash -670741229, now seen corresponding path program 1 times [2024-06-28 00:45:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:05,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503594389] [2024-06-28 00:45:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:11,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503594389] [2024-06-28 00:45:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503594389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:11,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:11,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:45:11,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161815377] [2024-06-28 00:45:11,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:11,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:45:11,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:11,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:45:11,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:45:11,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:11,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 643 transitions, 13365 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:11,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:11,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:11,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:14,338 INFO L124 PetriNetUnfolderBase]: 5847/9373 cut-off events. [2024-06-28 00:45:14,338 INFO L125 PetriNetUnfolderBase]: For 816415/816415 co-relation queries the response was YES. [2024-06-28 00:45:14,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85047 conditions, 9373 events. 5847/9373 cut-off events. For 816415/816415 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 64105 event pairs, 2261 based on Foata normal form. 20/9390 useless extension candidates. Maximal degree in co-relation 84866. Up to 8873 conditions per place. [2024-06-28 00:45:14,472 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 621 selfloop transitions, 37 changer transitions 0/663 dead transitions. [2024-06-28 00:45:14,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 663 transitions, 14855 flow [2024-06-28 00:45:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:45:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:45:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 00:45:14,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 00:45:14,473 INFO L175 Difference]: Start difference. First operand has 383 places, 643 transitions, 13365 flow. Second operand 8 states and 127 transitions. [2024-06-28 00:45:14,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 663 transitions, 14855 flow [2024-06-28 00:45:16,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 663 transitions, 14633 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 00:45:16,723 INFO L231 Difference]: Finished difference. Result has 384 places, 643 transitions, 13235 flow [2024-06-28 00:45:16,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13143, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13235, PETRI_PLACES=384, PETRI_TRANSITIONS=643} [2024-06-28 00:45:16,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-28 00:45:16,723 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 643 transitions, 13235 flow [2024-06-28 00:45:16,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:16,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:16,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:16,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:45:16,723 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:16,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1169868391, now seen corresponding path program 1 times [2024-06-28 00:45:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:16,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387751139] [2024-06-28 00:45:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:20,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387751139] [2024-06-28 00:45:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387751139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:20,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:20,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:45:20,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014468828] [2024-06-28 00:45:20,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:20,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:45:20,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:45:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:45:20,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:20,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 643 transitions, 13235 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:20,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:20,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:20,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:23,675 INFO L124 PetriNetUnfolderBase]: 5829/9342 cut-off events. [2024-06-28 00:45:23,675 INFO L125 PetriNetUnfolderBase]: For 765282/765282 co-relation queries the response was YES. [2024-06-28 00:45:23,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84154 conditions, 9342 events. 5829/9342 cut-off events. For 765282/765282 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 63486 event pairs, 1590 based on Foata normal form. 6/9336 useless extension candidates. Maximal degree in co-relation 83972. Up to 8826 conditions per place. [2024-06-28 00:45:23,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 576 selfloop transitions, 92 changer transitions 0/673 dead transitions. [2024-06-28 00:45:23,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 673 transitions, 14802 flow [2024-06-28 00:45:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:45:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:45:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 00:45:23,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 00:45:23,815 INFO L175 Difference]: Start difference. First operand has 384 places, 643 transitions, 13235 flow. Second operand 9 states and 154 transitions. [2024-06-28 00:45:23,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 673 transitions, 14802 flow [2024-06-28 00:45:26,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 673 transitions, 14665 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 00:45:26,352 INFO L231 Difference]: Finished difference. Result has 386 places, 643 transitions, 13301 flow [2024-06-28 00:45:26,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13098, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13301, PETRI_PLACES=386, PETRI_TRANSITIONS=643} [2024-06-28 00:45:26,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-28 00:45:26,352 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 643 transitions, 13301 flow [2024-06-28 00:45:26,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:26,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:26,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:26,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:45:26,353 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:26,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:26,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1457471879, now seen corresponding path program 1 times [2024-06-28 00:45:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729136736] [2024-06-28 00:45:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:30,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:30,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729136736] [2024-06-28 00:45:30,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729136736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:30,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:30,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:45:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258310794] [2024-06-28 00:45:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:30,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:45:30,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:45:30,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:45:30,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:30,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 643 transitions, 13301 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:30,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:30,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:30,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:33,930 INFO L124 PetriNetUnfolderBase]: 5845/9369 cut-off events. [2024-06-28 00:45:33,930 INFO L125 PetriNetUnfolderBase]: For 778705/778711 co-relation queries the response was YES. [2024-06-28 00:45:34,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84411 conditions, 9369 events. 5845/9369 cut-off events. For 778705/778711 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 63927 event pairs, 1822 based on Foata normal form. 6/9366 useless extension candidates. Maximal degree in co-relation 84229. Up to 8717 conditions per place. [2024-06-28 00:45:34,060 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 566 selfloop transitions, 111 changer transitions 0/682 dead transitions. [2024-06-28 00:45:34,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 682 transitions, 15191 flow [2024-06-28 00:45:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:45:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:45:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 00:45:34,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 00:45:34,062 INFO L175 Difference]: Start difference. First operand has 386 places, 643 transitions, 13301 flow. Second operand 9 states and 154 transitions. [2024-06-28 00:45:34,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 682 transitions, 15191 flow [2024-06-28 00:45:36,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 682 transitions, 14899 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-28 00:45:36,738 INFO L231 Difference]: Finished difference. Result has 386 places, 649 transitions, 13383 flow [2024-06-28 00:45:36,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13009, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13383, PETRI_PLACES=386, PETRI_TRANSITIONS=649} [2024-06-28 00:45:36,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-28 00:45:36,739 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 649 transitions, 13383 flow [2024-06-28 00:45:36,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:36,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:36,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:36,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:45:36,739 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:36,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:36,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1457532329, now seen corresponding path program 2 times [2024-06-28 00:45:36,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:36,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206125638] [2024-06-28 00:45:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:36,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:41,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206125638] [2024-06-28 00:45:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206125638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:41,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:41,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:45:41,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979281893] [2024-06-28 00:45:41,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:41,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:45:41,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:45:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:45:41,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:41,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 649 transitions, 13383 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-28 00:45:41,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:41,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:41,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:44,494 INFO L124 PetriNetUnfolderBase]: 5848/9386 cut-off events. [2024-06-28 00:45:44,494 INFO L125 PetriNetUnfolderBase]: For 783860/783866 co-relation queries the response was YES. [2024-06-28 00:45:44,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84171 conditions, 9386 events. 5848/9386 cut-off events. For 783860/783866 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64071 event pairs, 1837 based on Foata normal form. 6/9383 useless extension candidates. Maximal degree in co-relation 83991. Up to 8804 conditions per place. [2024-06-28 00:45:44,624 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 568 selfloop transitions, 105 changer transitions 0/678 dead transitions. [2024-06-28 00:45:44,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 678 transitions, 14991 flow [2024-06-28 00:45:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:45:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:45:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 00:45:44,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 00:45:44,626 INFO L175 Difference]: Start difference. First operand has 386 places, 649 transitions, 13383 flow. Second operand 9 states and 149 transitions. [2024-06-28 00:45:44,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 678 transitions, 14991 flow [2024-06-28 00:45:46,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 678 transitions, 14762 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-28 00:45:46,864 INFO L231 Difference]: Finished difference. Result has 390 places, 651 transitions, 13425 flow [2024-06-28 00:45:46,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13160, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13425, PETRI_PLACES=390, PETRI_TRANSITIONS=651} [2024-06-28 00:45:46,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-28 00:45:46,865 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 651 transitions, 13425 flow [2024-06-28 00:45:46,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-28 00:45:46,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:46,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:46,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:45:46,866 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:46,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1741259143, now seen corresponding path program 3 times [2024-06-28 00:45:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:46,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163945797] [2024-06-28 00:45:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:46,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:51,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163945797] [2024-06-28 00:45:51,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163945797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:51,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:51,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:45:51,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800912609] [2024-06-28 00:45:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:51,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:45:51,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:51,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:45:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:45:51,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:51,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 651 transitions, 13425 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:51,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:51,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:51,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:54,831 INFO L124 PetriNetUnfolderBase]: 5831/9332 cut-off events. [2024-06-28 00:45:54,831 INFO L125 PetriNetUnfolderBase]: For 784187/784187 co-relation queries the response was YES. [2024-06-28 00:45:54,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83903 conditions, 9332 events. 5831/9332 cut-off events. For 784187/784187 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 63157 event pairs, 1510 based on Foata normal form. 4/9324 useless extension candidates. Maximal degree in co-relation 83721. Up to 8190 conditions per place. [2024-06-28 00:45:54,960 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 105 changer transitions 0/690 dead transitions. [2024-06-28 00:45:54,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 690 transitions, 15086 flow [2024-06-28 00:45:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:45:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:45:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 00:45:54,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 00:45:54,961 INFO L175 Difference]: Start difference. First operand has 390 places, 651 transitions, 13425 flow. Second operand 9 states and 164 transitions. [2024-06-28 00:45:54,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 690 transitions, 15086 flow [2024-06-28 00:45:57,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 690 transitions, 14785 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-28 00:45:57,499 INFO L231 Difference]: Finished difference. Result has 390 places, 651 transitions, 13370 flow [2024-06-28 00:45:57,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13124, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13370, PETRI_PLACES=390, PETRI_TRANSITIONS=651} [2024-06-28 00:45:57,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-28 00:45:57,500 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 651 transitions, 13370 flow [2024-06-28 00:45:57,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:57,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:57,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:57,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:45:57,500 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:57,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1747693193, now seen corresponding path program 1 times [2024-06-28 00:45:57,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:57,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344969936] [2024-06-28 00:45:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:57,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:01,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:01,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344969936] [2024-06-28 00:46:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344969936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:01,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:46:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474905553] [2024-06-28 00:46:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:46:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:46:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:46:01,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:01,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 651 transitions, 13370 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:01,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:01,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:01,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:05,343 INFO L124 PetriNetUnfolderBase]: 5792/9327 cut-off events. [2024-06-28 00:46:05,343 INFO L125 PetriNetUnfolderBase]: For 784037/784037 co-relation queries the response was YES. [2024-06-28 00:46:05,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82871 conditions, 9327 events. 5792/9327 cut-off events. For 784037/784037 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 63983 event pairs, 1670 based on Foata normal form. 13/9337 useless extension candidates. Maximal degree in co-relation 82689. Up to 8443 conditions per place. [2024-06-28 00:46:05,477 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 489 selfloop transitions, 206 changer transitions 0/700 dead transitions. [2024-06-28 00:46:05,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 700 transitions, 15361 flow [2024-06-28 00:46:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:46:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:46:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-28 00:46:05,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 00:46:05,478 INFO L175 Difference]: Start difference. First operand has 390 places, 651 transitions, 13370 flow. Second operand 12 states and 212 transitions. [2024-06-28 00:46:05,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 700 transitions, 15361 flow [2024-06-28 00:46:08,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 700 transitions, 15119 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 00:46:08,153 INFO L231 Difference]: Finished difference. Result has 395 places, 651 transitions, 13570 flow [2024-06-28 00:46:08,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13128, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13570, PETRI_PLACES=395, PETRI_TRANSITIONS=651} [2024-06-28 00:46:08,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-28 00:46:08,154 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 651 transitions, 13570 flow [2024-06-28 00:46:08,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:08,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:08,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:08,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:46:08,155 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:08,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:08,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1112999545, now seen corresponding path program 4 times [2024-06-28 00:46:08,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:08,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637319871] [2024-06-28 00:46:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:12,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637319871] [2024-06-28 00:46:12,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637319871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:12,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:12,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:46:12,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234054725] [2024-06-28 00:46:12,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:12,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:46:12,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:46:12,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:46:12,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:12,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 651 transitions, 13570 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:12,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:12,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:12,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:15,936 INFO L124 PetriNetUnfolderBase]: 5800/9306 cut-off events. [2024-06-28 00:46:15,936 INFO L125 PetriNetUnfolderBase]: For 765467/765467 co-relation queries the response was YES. [2024-06-28 00:46:16,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83305 conditions, 9306 events. 5800/9306 cut-off events. For 765467/765467 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 63527 event pairs, 1788 based on Foata normal form. 2/9299 useless extension candidates. Maximal degree in co-relation 83123. Up to 8702 conditions per place. [2024-06-28 00:46:16,078 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 575 selfloop transitions, 103 changer transitions 0/683 dead transitions. [2024-06-28 00:46:16,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 683 transitions, 15315 flow [2024-06-28 00:46:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:46:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:46:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 00:46:16,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 00:46:16,079 INFO L175 Difference]: Start difference. First operand has 395 places, 651 transitions, 13570 flow. Second operand 9 states and 150 transitions. [2024-06-28 00:46:16,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 683 transitions, 15315 flow [2024-06-28 00:46:19,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 683 transitions, 14893 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-28 00:46:19,073 INFO L231 Difference]: Finished difference. Result has 394 places, 653 transitions, 13393 flow [2024-06-28 00:46:19,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13148, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13393, PETRI_PLACES=394, PETRI_TRANSITIONS=653} [2024-06-28 00:46:19,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-28 00:46:19,073 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 653 transitions, 13393 flow [2024-06-28 00:46:19,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:19,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:19,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:19,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:46:19,074 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:19,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1222469601, now seen corresponding path program 5 times [2024-06-28 00:46:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:19,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731443954] [2024-06-28 00:46:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:19,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:23,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:23,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731443954] [2024-06-28 00:46:23,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731443954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:23,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:23,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:46:23,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874389753] [2024-06-28 00:46:23,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:23,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:46:23,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:46:23,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:46:23,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:23,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 653 transitions, 13393 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:23,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:23,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:23,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:26,891 INFO L124 PetriNetUnfolderBase]: 5808/9319 cut-off events. [2024-06-28 00:46:26,892 INFO L125 PetriNetUnfolderBase]: For 774945/774945 co-relation queries the response was YES. [2024-06-28 00:46:26,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83214 conditions, 9319 events. 5808/9319 cut-off events. For 774945/774945 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 63611 event pairs, 1799 based on Foata normal form. 2/9312 useless extension candidates. Maximal degree in co-relation 83030. Up to 8755 conditions per place. [2024-06-28 00:46:27,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 572 selfloop transitions, 103 changer transitions 0/680 dead transitions. [2024-06-28 00:46:27,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 680 transitions, 14980 flow [2024-06-28 00:46:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:46:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:46:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 00:46:27,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 00:46:27,028 INFO L175 Difference]: Start difference. First operand has 394 places, 653 transitions, 13393 flow. Second operand 9 states and 145 transitions. [2024-06-28 00:46:27,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 680 transitions, 14980 flow [2024-06-28 00:46:29,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 680 transitions, 14799 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 00:46:29,852 INFO L231 Difference]: Finished difference. Result has 397 places, 655 transitions, 13466 flow [2024-06-28 00:46:29,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13220, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13466, PETRI_PLACES=397, PETRI_TRANSITIONS=655} [2024-06-28 00:46:29,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-28 00:46:29,852 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 655 transitions, 13466 flow [2024-06-28 00:46:29,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:29,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:29,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:29,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:46:29,853 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:29,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1466318457, now seen corresponding path program 6 times [2024-06-28 00:46:29,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:29,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109577626] [2024-06-28 00:46:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:29,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:34,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:34,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109577626] [2024-06-28 00:46:34,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109577626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:34,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:34,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:46:34,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478770588] [2024-06-28 00:46:34,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:34,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:46:34,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:34,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:46:34,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:46:34,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:34,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 655 transitions, 13466 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-28 00:46:34,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:34,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:34,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:37,141 INFO L124 PetriNetUnfolderBase]: 5816/9340 cut-off events. [2024-06-28 00:46:37,142 INFO L125 PetriNetUnfolderBase]: For 789075/789075 co-relation queries the response was YES. [2024-06-28 00:46:37,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83380 conditions, 9340 events. 5816/9340 cut-off events. For 789075/789075 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 63539 event pairs, 1638 based on Foata normal form. 2/9333 useless extension candidates. Maximal degree in co-relation 83195. Up to 8490 conditions per place. [2024-06-28 00:46:37,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 552 selfloop transitions, 132 changer transitions 0/689 dead transitions. [2024-06-28 00:46:37,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 689 transitions, 15388 flow [2024-06-28 00:46:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:46:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:46:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 00:46:37,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 00:46:37,276 INFO L175 Difference]: Start difference. First operand has 397 places, 655 transitions, 13466 flow. Second operand 9 states and 151 transitions. [2024-06-28 00:46:37,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 689 transitions, 15388 flow [2024-06-28 00:46:40,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 689 transitions, 15170 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:46:40,327 INFO L231 Difference]: Finished difference. Result has 400 places, 658 transitions, 13631 flow [2024-06-28 00:46:40,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13248, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13631, PETRI_PLACES=400, PETRI_TRANSITIONS=658} [2024-06-28 00:46:40,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-28 00:46:40,328 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 658 transitions, 13631 flow [2024-06-28 00:46:40,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-28 00:46:40,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:40,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:40,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:46:40,328 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:40,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1454890617, now seen corresponding path program 7 times [2024-06-28 00:46:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:40,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175976285] [2024-06-28 00:46:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:40,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175976285] [2024-06-28 00:46:45,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175976285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:45,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:45,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:46:45,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743129132] [2024-06-28 00:46:45,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:45,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:46:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:46:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:46:45,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:45,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 658 transitions, 13631 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:45,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:45,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:45,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:48,473 INFO L124 PetriNetUnfolderBase]: 5837/9369 cut-off events. [2024-06-28 00:46:48,473 INFO L125 PetriNetUnfolderBase]: For 812329/812329 co-relation queries the response was YES. [2024-06-28 00:46:48,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84392 conditions, 9369 events. 5837/9369 cut-off events. For 812329/812329 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 63730 event pairs, 1654 based on Foata normal form. 2/9362 useless extension candidates. Maximal degree in co-relation 84205. Up to 8510 conditions per place. [2024-06-28 00:46:48,607 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 546 selfloop transitions, 139 changer transitions 0/690 dead transitions. [2024-06-28 00:46:48,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 690 transitions, 15603 flow [2024-06-28 00:46:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:46:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:46:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 00:46:48,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 00:46:48,609 INFO L175 Difference]: Start difference. First operand has 400 places, 658 transitions, 13631 flow. Second operand 9 states and 147 transitions. [2024-06-28 00:46:48,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 690 transitions, 15603 flow [2024-06-28 00:46:51,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 690 transitions, 15216 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 00:46:51,763 INFO L231 Difference]: Finished difference. Result has 402 places, 663 transitions, 13646 flow [2024-06-28 00:46:51,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13269, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13646, PETRI_PLACES=402, PETRI_TRANSITIONS=663} [2024-06-28 00:46:51,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-28 00:46:51,764 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 663 transitions, 13646 flow [2024-06-28 00:46:51,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:51,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:51,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:51,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:46:51,764 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:51,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1067317057, now seen corresponding path program 8 times [2024-06-28 00:46:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:51,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387813105] [2024-06-28 00:46:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:51,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:56,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:56,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387813105] [2024-06-28 00:46:56,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387813105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:56,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:56,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:46:56,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542603138] [2024-06-28 00:46:56,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:56,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:46:56,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:56,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:46:56,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:46:56,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:56,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 663 transitions, 13646 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:56,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:56,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:56,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:59,856 INFO L124 PetriNetUnfolderBase]: 5845/9381 cut-off events. [2024-06-28 00:46:59,856 INFO L125 PetriNetUnfolderBase]: For 823439/823439 co-relation queries the response was YES. [2024-06-28 00:46:59,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84216 conditions, 9381 events. 5845/9381 cut-off events. For 823439/823439 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 64089 event pairs, 1818 based on Foata normal form. 2/9374 useless extension candidates. Maximal degree in co-relation 84028. Up to 8812 conditions per place. [2024-06-28 00:46:59,994 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 571 selfloop transitions, 109 changer transitions 0/685 dead transitions. [2024-06-28 00:46:59,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 685 transitions, 15190 flow [2024-06-28 00:46:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:46:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:46:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 00:46:59,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-28 00:46:59,995 INFO L175 Difference]: Start difference. First operand has 402 places, 663 transitions, 13646 flow. Second operand 9 states and 141 transitions. [2024-06-28 00:46:59,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 685 transitions, 15190 flow [2024-06-28 00:47:03,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 685 transitions, 14963 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 00:47:03,101 INFO L231 Difference]: Finished difference. Result has 406 places, 665 transitions, 13687 flow [2024-06-28 00:47:03,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13421, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13687, PETRI_PLACES=406, PETRI_TRANSITIONS=665} [2024-06-28 00:47:03,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-28 00:47:03,101 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 665 transitions, 13687 flow [2024-06-28 00:47:03,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:03,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:03,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:03,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:47:03,102 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:03,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1396798167, now seen corresponding path program 9 times [2024-06-28 00:47:03,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:03,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255719163] [2024-06-28 00:47:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:07,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:07,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255719163] [2024-06-28 00:47:07,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255719163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:07,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:07,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:47:07,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123886231] [2024-06-28 00:47:07,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:07,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:47:07,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:07,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:47:07,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:47:08,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:08,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 665 transitions, 13687 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:08,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:08,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:08,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:11,100 INFO L124 PetriNetUnfolderBase]: 5853/9403 cut-off events. [2024-06-28 00:47:11,100 INFO L125 PetriNetUnfolderBase]: For 837106/837106 co-relation queries the response was YES. [2024-06-28 00:47:11,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84305 conditions, 9403 events. 5853/9403 cut-off events. For 837106/837106 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 64349 event pairs, 1800 based on Foata normal form. 2/9396 useless extension candidates. Maximal degree in co-relation 84116. Up to 8779 conditions per place. [2024-06-28 00:47:11,238 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 563 selfloop transitions, 120 changer transitions 0/688 dead transitions. [2024-06-28 00:47:11,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 688 transitions, 15373 flow [2024-06-28 00:47:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:47:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:47:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 00:47:11,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-28 00:47:11,240 INFO L175 Difference]: Start difference. First operand has 406 places, 665 transitions, 13687 flow. Second operand 9 states and 142 transitions. [2024-06-28 00:47:11,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 688 transitions, 15373 flow [2024-06-28 00:47:14,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 688 transitions, 15204 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 00:47:14,685 INFO L231 Difference]: Finished difference. Result has 409 places, 667 transitions, 13796 flow [2024-06-28 00:47:14,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13518, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13796, PETRI_PLACES=409, PETRI_TRANSITIONS=667} [2024-06-28 00:47:14,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-28 00:47:14,685 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 667 transitions, 13796 flow [2024-06-28 00:47:14,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:14,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:14,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:47:14,686 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:14,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 13874859, now seen corresponding path program 2 times [2024-06-28 00:47:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:14,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147409252] [2024-06-28 00:47:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:14,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:18,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147409252] [2024-06-28 00:47:18,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147409252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:18,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:18,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:47:18,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484888635] [2024-06-28 00:47:18,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:18,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:47:18,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:47:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:47:18,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:18,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 667 transitions, 13796 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:18,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:18,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:18,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:22,514 INFO L124 PetriNetUnfolderBase]: 5864/9447 cut-off events. [2024-06-28 00:47:22,515 INFO L125 PetriNetUnfolderBase]: For 860394/860394 co-relation queries the response was YES. [2024-06-28 00:47:22,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84427 conditions, 9447 events. 5864/9447 cut-off events. For 860394/860394 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 64860 event pairs, 1671 based on Foata normal form. 7/9445 useless extension candidates. Maximal degree in co-relation 84237. Up to 8339 conditions per place. [2024-06-28 00:47:22,655 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 262 changer transitions 0/723 dead transitions. [2024-06-28 00:47:22,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 723 transitions, 16241 flow [2024-06-28 00:47:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:47:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:47:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-28 00:47:22,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 00:47:22,656 INFO L175 Difference]: Start difference. First operand has 409 places, 667 transitions, 13796 flow. Second operand 12 states and 213 transitions. [2024-06-28 00:47:22,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 723 transitions, 16241 flow [2024-06-28 00:47:26,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 723 transitions, 15936 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 00:47:26,024 INFO L231 Difference]: Finished difference. Result has 414 places, 670 transitions, 14075 flow [2024-06-28 00:47:26,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13491, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14075, PETRI_PLACES=414, PETRI_TRANSITIONS=670} [2024-06-28 00:47:26,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-28 00:47:26,024 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 670 transitions, 14075 flow [2024-06-28 00:47:26,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:26,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:26,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:26,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:47:26,025 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:26,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 383444629, now seen corresponding path program 10 times [2024-06-28 00:47:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:26,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688044409] [2024-06-28 00:47:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:26,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688044409] [2024-06-28 00:47:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688044409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:30,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:30,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:47:30,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590973442] [2024-06-28 00:47:30,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:47:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:47:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:47:30,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:30,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 670 transitions, 14075 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:30,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:30,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:30,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:33,958 INFO L124 PetriNetUnfolderBase]: 5888/9467 cut-off events. [2024-06-28 00:47:33,958 INFO L125 PetriNetUnfolderBase]: For 851132/851132 co-relation queries the response was YES. [2024-06-28 00:47:34,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85224 conditions, 9467 events. 5888/9467 cut-off events. For 851132/851132 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 64827 event pairs, 1610 based on Foata normal form. 2/9457 useless extension candidates. Maximal degree in co-relation 85033. Up to 8797 conditions per place. [2024-06-28 00:47:34,097 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 560 selfloop transitions, 137 changer transitions 0/702 dead transitions. [2024-06-28 00:47:34,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 702 transitions, 15723 flow [2024-06-28 00:47:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:47:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:47:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-28 00:47:34,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-28 00:47:34,099 INFO L175 Difference]: Start difference. First operand has 414 places, 670 transitions, 14075 flow. Second operand 11 states and 181 transitions. [2024-06-28 00:47:34,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 702 transitions, 15723 flow [2024-06-28 00:47:37,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 702 transitions, 15239 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 00:47:37,808 INFO L231 Difference]: Finished difference. Result has 417 places, 671 transitions, 13902 flow [2024-06-28 00:47:37,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13591, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13902, PETRI_PLACES=417, PETRI_TRANSITIONS=671} [2024-06-28 00:47:37,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-28 00:47:37,809 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 671 transitions, 13902 flow [2024-06-28 00:47:37,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:37,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:37,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:37,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:47:37,810 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:37,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 16587017, now seen corresponding path program 1 times [2024-06-28 00:47:37,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:37,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934218887] [2024-06-28 00:47:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:37,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:43,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:43,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934218887] [2024-06-28 00:47:43,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934218887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:43,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:43,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:47:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326628025] [2024-06-28 00:47:43,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:47:43,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:47:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:47:43,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:43,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 671 transitions, 13902 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:43,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:43,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:43,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:46,687 INFO L124 PetriNetUnfolderBase]: 5879/9442 cut-off events. [2024-06-28 00:47:46,687 INFO L125 PetriNetUnfolderBase]: For 857737/857737 co-relation queries the response was YES. [2024-06-28 00:47:46,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84605 conditions, 9442 events. 5879/9442 cut-off events. For 857737/857737 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 64928 event pairs, 2275 based on Foata normal form. 3/9442 useless extension candidates. Maximal degree in co-relation 84413. Up to 8997 conditions per place. [2024-06-28 00:47:46,823 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 618 selfloop transitions, 70 changer transitions 0/693 dead transitions. [2024-06-28 00:47:46,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 693 transitions, 15655 flow [2024-06-28 00:47:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:47:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:47:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-28 00:47:46,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 00:47:46,824 INFO L175 Difference]: Start difference. First operand has 417 places, 671 transitions, 13902 flow. Second operand 10 states and 155 transitions. [2024-06-28 00:47:46,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 693 transitions, 15655 flow [2024-06-28 00:47:50,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 693 transitions, 15310 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-28 00:47:50,383 INFO L231 Difference]: Finished difference. Result has 418 places, 671 transitions, 13745 flow [2024-06-28 00:47:50,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13581, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13745, PETRI_PLACES=418, PETRI_TRANSITIONS=671} [2024-06-28 00:47:50,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-28 00:47:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 671 transitions, 13745 flow [2024-06-28 00:47:50,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:50,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:50,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:47:50,384 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:50,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1725527573, now seen corresponding path program 3 times [2024-06-28 00:47:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:50,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097352788] [2024-06-28 00:47:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:50,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:55,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:55,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097352788] [2024-06-28 00:47:55,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097352788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:55,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:55,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:47:55,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677268092] [2024-06-28 00:47:55,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:55,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:47:55,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:47:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:47:55,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:55,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 671 transitions, 13745 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:55,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:55,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:55,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:58,852 INFO L124 PetriNetUnfolderBase]: 5864/9418 cut-off events. [2024-06-28 00:47:58,852 INFO L125 PetriNetUnfolderBase]: For 852345/852345 co-relation queries the response was YES. [2024-06-28 00:47:58,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83726 conditions, 9418 events. 5864/9418 cut-off events. For 852345/852345 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 64714 event pairs, 2275 based on Foata normal form. 5/9420 useless extension candidates. Maximal degree in co-relation 83533. Up to 8985 conditions per place. [2024-06-28 00:47:58,989 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 620 selfloop transitions, 67 changer transitions 0/692 dead transitions. [2024-06-28 00:47:58,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 692 transitions, 15286 flow [2024-06-28 00:47:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:47:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:47:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-28 00:47:58,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-28 00:47:58,991 INFO L175 Difference]: Start difference. First operand has 418 places, 671 transitions, 13745 flow. Second operand 10 states and 153 transitions. [2024-06-28 00:47:58,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 692 transitions, 15286 flow [2024-06-28 00:48:02,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 692 transitions, 15080 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-28 00:48:02,197 INFO L231 Difference]: Finished difference. Result has 420 places, 671 transitions, 13698 flow [2024-06-28 00:48:02,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13539, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13698, PETRI_PLACES=420, PETRI_TRANSITIONS=671} [2024-06-28 00:48:02,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-28 00:48:02,198 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 671 transitions, 13698 flow [2024-06-28 00:48:02,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:02,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:48:02,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:48:02,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:48:02,198 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:48:02,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:48:02,199 INFO L85 PathProgramCache]: Analyzing trace with hash 153784881, now seen corresponding path program 2 times [2024-06-28 00:48:02,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:48:02,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470113926] [2024-06-28 00:48:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:48:02,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:48:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:48:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:48:06,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:48:06,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470113926] [2024-06-28 00:48:06,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470113926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:48:06,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:48:06,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:48:06,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873919154] [2024-06-28 00:48:06,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:48:06,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:48:06,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:48:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:48:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:48:06,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:48:06,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 671 transitions, 13698 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:06,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:48:06,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:48:06,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:48:09,806 INFO L124 PetriNetUnfolderBase]: 5849/9420 cut-off events. [2024-06-28 00:48:09,806 INFO L125 PetriNetUnfolderBase]: For 842940/842940 co-relation queries the response was YES. [2024-06-28 00:48:09,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83213 conditions, 9420 events. 5849/9420 cut-off events. For 842940/842940 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 64700 event pairs, 1713 based on Foata normal form. 5/9416 useless extension candidates. Maximal degree in co-relation 83019. Up to 8344 conditions per place. [2024-06-28 00:48:09,944 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 262 changer transitions 0/707 dead transitions. [2024-06-28 00:48:09,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 707 transitions, 15597 flow [2024-06-28 00:48:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:48:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:48:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 00:48:09,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:48:09,946 INFO L175 Difference]: Start difference. First operand has 420 places, 671 transitions, 13698 flow. Second operand 10 states and 175 transitions. [2024-06-28 00:48:09,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 707 transitions, 15597 flow [2024-06-28 00:48:13,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 707 transitions, 15365 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-28 00:48:13,938 INFO L231 Difference]: Finished difference. Result has 421 places, 671 transitions, 14033 flow [2024-06-28 00:48:13,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13496, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14033, PETRI_PLACES=421, PETRI_TRANSITIONS=671} [2024-06-28 00:48:13,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-28 00:48:13,939 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 671 transitions, 14033 flow [2024-06-28 00:48:13,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:13,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:48:13,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:48:13,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:48:13,939 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:48:13,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:48:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash -177530147, now seen corresponding path program 11 times [2024-06-28 00:48:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:48:13,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529987703] [2024-06-28 00:48:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:48:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:48:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:48:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:48:18,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:48:18,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529987703] [2024-06-28 00:48:18,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529987703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:48:18,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:48:18,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:48:18,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040517109] [2024-06-28 00:48:18,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:48:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:48:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:48:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:48:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:48:18,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:48:18,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 671 transitions, 14033 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:18,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:48:18,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:48:18,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:48:21,598 INFO L124 PetriNetUnfolderBase]: 5837/9387 cut-off events. [2024-06-28 00:48:21,598 INFO L125 PetriNetUnfolderBase]: For 825646/825646 co-relation queries the response was YES. [2024-06-28 00:48:21,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83417 conditions, 9387 events. 5837/9387 cut-off events. For 825646/825646 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 64315 event pairs, 1604 based on Foata normal form. 2/9377 useless extension candidates. Maximal degree in co-relation 83223. Up to 8767 conditions per place. [2024-06-28 00:48:21,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 135 changer transitions 0/695 dead transitions. [2024-06-28 00:48:21,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 695 transitions, 15550 flow [2024-06-28 00:48:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:48:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:48:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 00:48:21,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 00:48:21,740 INFO L175 Difference]: Start difference. First operand has 421 places, 671 transitions, 14033 flow. Second operand 9 states and 150 transitions. [2024-06-28 00:48:21,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 695 transitions, 15550 flow [2024-06-28 00:48:25,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 695 transitions, 15011 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-28 00:48:25,492 INFO L231 Difference]: Finished difference. Result has 421 places, 671 transitions, 13769 flow [2024-06-28 00:48:25,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13494, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13769, PETRI_PLACES=421, PETRI_TRANSITIONS=671} [2024-06-28 00:48:25,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-28 00:48:25,493 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 671 transitions, 13769 flow [2024-06-28 00:48:25,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:25,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:48:25,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:48:25,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:48:25,494 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:48:25,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:48:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash 681730439, now seen corresponding path program 12 times [2024-06-28 00:48:25,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:48:25,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216212670] [2024-06-28 00:48:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:48:25,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:48:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:48:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:48:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:48:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216212670] [2024-06-28 00:48:30,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216212670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:48:30,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:48:30,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:48:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590164227] [2024-06-28 00:48:30,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:48:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:48:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:48:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:48:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:48:30,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:48:30,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 671 transitions, 13769 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:30,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:48:30,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:48:30,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:48:33,500 INFO L124 PetriNetUnfolderBase]: 5825/9347 cut-off events. [2024-06-28 00:48:33,500 INFO L125 PetriNetUnfolderBase]: For 819569/819569 co-relation queries the response was YES. [2024-06-28 00:48:33,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82674 conditions, 9347 events. 5825/9347 cut-off events. For 819569/819569 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 63706 event pairs, 1346 based on Foata normal form. 2/9337 useless extension candidates. Maximal degree in co-relation 82480. Up to 6414 conditions per place. [2024-06-28 00:48:33,636 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 505 selfloop transitions, 200 changer transitions 0/710 dead transitions. [2024-06-28 00:48:33,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 710 transitions, 15637 flow [2024-06-28 00:48:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:48:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:48:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:48:33,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 00:48:33,638 INFO L175 Difference]: Start difference. First operand has 421 places, 671 transitions, 13769 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:48:33,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 710 transitions, 15637 flow [2024-06-28 00:48:37,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 710 transitions, 15326 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 00:48:37,990 INFO L231 Difference]: Finished difference. Result has 422 places, 671 transitions, 13863 flow [2024-06-28 00:48:37,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13458, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13863, PETRI_PLACES=422, PETRI_TRANSITIONS=671} [2024-06-28 00:48:37,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-28 00:48:37,990 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 671 transitions, 13863 flow [2024-06-28 00:48:37,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:37,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:48:37,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:48:37,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:48:37,991 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:48:37,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:48:37,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2024153217, now seen corresponding path program 2 times [2024-06-28 00:48:37,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:48:37,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507494701] [2024-06-28 00:48:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:48:37,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:48:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:48:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:48:41,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:48:41,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507494701] [2024-06-28 00:48:41,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507494701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:48:41,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:48:41,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:48:41,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387202440] [2024-06-28 00:48:41,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:48:41,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:48:41,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:48:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:48:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:48:41,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:48:41,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 671 transitions, 13863 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:41,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:48:41,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:48:41,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:48:44,937 INFO L124 PetriNetUnfolderBase]: 5845/9384 cut-off events. [2024-06-28 00:48:44,937 INFO L125 PetriNetUnfolderBase]: For 828131/828131 co-relation queries the response was YES. [2024-06-28 00:48:45,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83718 conditions, 9384 events. 5845/9384 cut-off events. For 828131/828131 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 64309 event pairs, 1566 based on Foata normal form. 2/9383 useless extension candidates. Maximal degree in co-relation 83523. Up to 8865 conditions per place. [2024-06-28 00:48:45,076 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 627 selfloop transitions, 83 changer transitions 0/715 dead transitions. [2024-06-28 00:48:45,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 715 transitions, 15638 flow [2024-06-28 00:48:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:48:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:48:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 00:48:45,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 00:48:45,078 INFO L175 Difference]: Start difference. First operand has 422 places, 671 transitions, 13863 flow. Second operand 9 states and 164 transitions. [2024-06-28 00:48:45,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 715 transitions, 15638 flow [2024-06-28 00:48:48,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 715 transitions, 15334 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:48:48,954 INFO L231 Difference]: Finished difference. Result has 424 places, 677 transitions, 13853 flow [2024-06-28 00:48:48,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13559, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13853, PETRI_PLACES=424, PETRI_TRANSITIONS=677} [2024-06-28 00:48:48,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-28 00:48:48,955 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 677 transitions, 13853 flow [2024-06-28 00:48:48,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:48,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:48:48,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:48:48,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:48:48,955 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:48:48,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:48:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1425062281, now seen corresponding path program 3 times [2024-06-28 00:48:48,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:48:48,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951988248] [2024-06-28 00:48:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:48:48,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:48:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:48:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:48:52,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:48:52,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951988248] [2024-06-28 00:48:52,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951988248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:48:52,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:48:52,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:48:52,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748508315] [2024-06-28 00:48:52,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:48:52,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:48:52,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:48:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:48:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:48:52,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:48:52,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 677 transitions, 13853 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:52,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:48:52,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:48:52,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:48:56,658 INFO L124 PetriNetUnfolderBase]: 5839/9392 cut-off events. [2024-06-28 00:48:56,658 INFO L125 PetriNetUnfolderBase]: For 835543/835543 co-relation queries the response was YES. [2024-06-28 00:48:56,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82992 conditions, 9392 events. 5839/9392 cut-off events. For 835543/835543 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 64464 event pairs, 1733 based on Foata normal form. 2/9391 useless extension candidates. Maximal degree in co-relation 82796. Up to 8671 conditions per place. [2024-06-28 00:48:56,795 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 160 changer transitions 0/739 dead transitions. [2024-06-28 00:48:56,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 739 transitions, 15712 flow [2024-06-28 00:48:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:48:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:48:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 250 transitions. [2024-06-28 00:48:56,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 00:48:56,796 INFO L175 Difference]: Start difference. First operand has 424 places, 677 transitions, 13853 flow. Second operand 14 states and 250 transitions. [2024-06-28 00:48:56,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 739 transitions, 15712 flow [2024-06-28 00:49:01,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 739 transitions, 15528 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 00:49:01,426 INFO L231 Difference]: Finished difference. Result has 431 places, 677 transitions, 14025 flow [2024-06-28 00:49:01,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13669, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14025, PETRI_PLACES=431, PETRI_TRANSITIONS=677} [2024-06-28 00:49:01,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-28 00:49:01,426 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 677 transitions, 14025 flow [2024-06-28 00:49:01,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:49:01,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:49:01,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:49:01,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:49:01,427 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:49:01,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:49:01,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1740240633, now seen corresponding path program 13 times [2024-06-28 00:49:01,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:49:01,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278345523] [2024-06-28 00:49:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:49:01,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:49:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:49:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:49:05,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:49:05,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278345523] [2024-06-28 00:49:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278345523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:49:05,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:49:05,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:49:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679364003] [2024-06-28 00:49:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:49:05,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:49:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:49:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:49:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:49:05,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:49:05,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 677 transitions, 14025 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-28 00:49:05,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:49:05,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:49:05,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:49:08,391 INFO L124 PetriNetUnfolderBase]: 5834/9367 cut-off events. [2024-06-28 00:49:08,391 INFO L125 PetriNetUnfolderBase]: For 841044/841047 co-relation queries the response was YES. [2024-06-28 00:49:08,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83139 conditions, 9367 events. 5834/9367 cut-off events. For 841044/841047 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 64293 event pairs, 1800 based on Foata normal form. 4/9366 useless extension candidates. Maximal degree in co-relation 82942. Up to 8721 conditions per place. [2024-06-28 00:49:08,526 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 604 selfloop transitions, 112 changer transitions 0/721 dead transitions. [2024-06-28 00:49:08,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 721 transitions, 15964 flow [2024-06-28 00:49:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:49:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:49:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 00:49:08,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 00:49:08,529 INFO L175 Difference]: Start difference. First operand has 431 places, 677 transitions, 14025 flow. Second operand 9 states and 166 transitions. [2024-06-28 00:49:08,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 721 transitions, 15964 flow [2024-06-28 00:49:12,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 721 transitions, 15408 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-28 00:49:12,425 INFO L231 Difference]: Finished difference. Result has 430 places, 677 transitions, 13705 flow [2024-06-28 00:49:12,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13473, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13705, PETRI_PLACES=430, PETRI_TRANSITIONS=677} [2024-06-28 00:49:12,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-28 00:49:12,426 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 677 transitions, 13705 flow [2024-06-28 00:49:12,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-28 00:49:12,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:49:12,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:49:12,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:49:12,426 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:49:12,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:49:12,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1740180183, now seen corresponding path program 14 times [2024-06-28 00:49:12,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:49:12,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212552424] [2024-06-28 00:49:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:49:12,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:49:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:49:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:49:16,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:49:16,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212552424] [2024-06-28 00:49:16,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212552424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:49:16,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:49:16,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:49:16,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030665396] [2024-06-28 00:49:16,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:49:16,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:49:16,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:49:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:49:16,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:49:16,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:49:16,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 677 transitions, 13705 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-28 00:49:16,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:49:16,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:49:16,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:49:19,606 INFO L124 PetriNetUnfolderBase]: 5829/9387 cut-off events. [2024-06-28 00:49:19,606 INFO L125 PetriNetUnfolderBase]: For 812416/812419 co-relation queries the response was YES. [2024-06-28 00:49:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82146 conditions, 9387 events. 5829/9387 cut-off events. For 812416/812419 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 64525 event pairs, 1774 based on Foata normal form. 4/9386 useless extension candidates. Maximal degree in co-relation 81949. Up to 8784 conditions per place. [2024-06-28 00:49:19,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 606 selfloop transitions, 104 changer transitions 0/715 dead transitions. [2024-06-28 00:49:19,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 715 transitions, 15416 flow [2024-06-28 00:49:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:49:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:49:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:49:19,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 00:49:19,740 INFO L175 Difference]: Start difference. First operand has 430 places, 677 transitions, 13705 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:49:19,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 715 transitions, 15416 flow [2024-06-28 00:49:23,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 715 transitions, 15181 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 00:49:23,424 INFO L231 Difference]: Finished difference. Result has 432 places, 677 transitions, 13686 flow [2024-06-28 00:49:23,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13470, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13686, PETRI_PLACES=432, PETRI_TRANSITIONS=677} [2024-06-28 00:49:23,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-28 00:49:23,425 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 677 transitions, 13686 flow [2024-06-28 00:49:23,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-28 00:49:23,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:49:23,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:49:23,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:49:23,425 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:49:23,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:49:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1888063913, now seen corresponding path program 15 times [2024-06-28 00:49:23,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:49:23,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503443684] [2024-06-28 00:49:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:49:23,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:49:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:49:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:49:27,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:49:27,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503443684] [2024-06-28 00:49:27,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503443684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:49:27,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:49:27,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:49:27,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337138985] [2024-06-28 00:49:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:49:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:49:27,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:49:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:49:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:49:27,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:49:27,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 677 transitions, 13686 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:49:27,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:49:27,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:49:27,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:49:30,804 INFO L124 PetriNetUnfolderBase]: 5817/9346 cut-off events. [2024-06-28 00:49:30,804 INFO L125 PetriNetUnfolderBase]: For 811605/811605 co-relation queries the response was YES. [2024-06-28 00:49:30,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81837 conditions, 9346 events. 5817/9346 cut-off events. For 811605/811605 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 63810 event pairs, 1439 based on Foata normal form. 2/9345 useless extension candidates. Maximal degree in co-relation 81639. Up to 8091 conditions per place. [2024-06-28 00:49:30,933 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 604 selfloop transitions, 115 changer transitions 0/724 dead transitions. [2024-06-28 00:49:30,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 724 transitions, 15443 flow [2024-06-28 00:49:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:49:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:49:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:49:30,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 00:49:30,934 INFO L175 Difference]: Start difference. First operand has 432 places, 677 transitions, 13686 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:49:30,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 724 transitions, 15443 flow [2024-06-28 00:49:34,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 724 transitions, 15229 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 00:49:34,821 INFO L231 Difference]: Finished difference. Result has 434 places, 677 transitions, 13742 flow [2024-06-28 00:49:34,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13472, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13742, PETRI_PLACES=434, PETRI_TRANSITIONS=677} [2024-06-28 00:49:34,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-28 00:49:34,822 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 677 transitions, 13742 flow [2024-06-28 00:49:34,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:49:34,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:49:34,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:49:34,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 00:49:34,822 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:49:34,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:49:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash 225499706, now seen corresponding path program 1 times [2024-06-28 00:49:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:49:34,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419302105] [2024-06-28 00:49:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:49:34,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:49:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:49:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:49:39,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:49:39,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419302105] [2024-06-28 00:49:39,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419302105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:49:39,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:49:39,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:49:39,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076390918] [2024-06-28 00:49:39,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:49:39,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:49:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:49:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:49:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:49:39,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:49:39,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 677 transitions, 13742 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:49:39,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:49:39,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:49:39,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:49:42,400 INFO L124 PetriNetUnfolderBase]: 5837/9402 cut-off events. [2024-06-28 00:49:42,400 INFO L125 PetriNetUnfolderBase]: For 829489/829489 co-relation queries the response was YES. [2024-06-28 00:49:42,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82507 conditions, 9402 events. 5837/9402 cut-off events. For 829489/829489 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 64773 event pairs, 1685 based on Foata normal form. 4/9403 useless extension candidates. Maximal degree in co-relation 82309. Up to 8469 conditions per place. [2024-06-28 00:49:42,537 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 524 selfloop transitions, 194 changer transitions 0/723 dead transitions. [2024-06-28 00:49:42,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 723 transitions, 15741 flow [2024-06-28 00:49:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:49:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:49:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-28 00:49:42,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-28 00:49:42,539 INFO L175 Difference]: Start difference. First operand has 434 places, 677 transitions, 13742 flow. Second operand 11 states and 193 transitions. [2024-06-28 00:49:42,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 723 transitions, 15741 flow [2024-06-28 00:49:47,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 723 transitions, 15556 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:49:47,029 INFO L231 Difference]: Finished difference. Result has 439 places, 680 transitions, 14008 flow [2024-06-28 00:49:47,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13557, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14008, PETRI_PLACES=439, PETRI_TRANSITIONS=680} [2024-06-28 00:49:47,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-28 00:49:47,029 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 680 transitions, 14008 flow [2024-06-28 00:49:47,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:49:47,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:49:47,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:49:47,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 00:49:47,030 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:49:47,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:49:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2025087820, now seen corresponding path program 2 times [2024-06-28 00:49:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:49:47,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898697411] [2024-06-28 00:49:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:49:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:49:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:49:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:49:51,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:49:51,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898697411] [2024-06-28 00:49:51,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898697411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:49:51,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:49:51,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:49:51,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104877850] [2024-06-28 00:49:51,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:49:51,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:49:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:49:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:49:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:49:51,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:49:51,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 680 transitions, 14008 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:49:51,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:49:51,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:49:51,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:49:54,452 INFO L124 PetriNetUnfolderBase]: 5889/9430 cut-off events. [2024-06-28 00:49:54,452 INFO L125 PetriNetUnfolderBase]: For 864141/864144 co-relation queries the response was YES. [2024-06-28 00:49:54,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84746 conditions, 9430 events. 5889/9430 cut-off events. For 864141/864144 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 64301 event pairs, 1337 based on Foata normal form. 6/9431 useless extension candidates. Maximal degree in co-relation 84547. Up to 7544 conditions per place. [2024-06-28 00:49:54,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 356 changer transitions 0/745 dead transitions. [2024-06-28 00:49:54,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 745 transitions, 16865 flow [2024-06-28 00:49:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:49:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:49:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-28 00:49:54,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 00:49:54,595 INFO L175 Difference]: Start difference. First operand has 439 places, 680 transitions, 14008 flow. Second operand 12 states and 212 transitions. [2024-06-28 00:49:54,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 745 transitions, 16865 flow [2024-06-28 00:49:58,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 745 transitions, 16468 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 00:49:58,858 INFO L231 Difference]: Finished difference. Result has 444 places, 689 transitions, 14494 flow [2024-06-28 00:49:58,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13611, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14494, PETRI_PLACES=444, PETRI_TRANSITIONS=689} [2024-06-28 00:49:58,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-28 00:49:58,858 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 689 transitions, 14494 flow [2024-06-28 00:49:58,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:49:58,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:49:58,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:49:58,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 00:49:58,858 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:49:58,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:49:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash -237923274, now seen corresponding path program 3 times [2024-06-28 00:49:58,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:49:58,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893212977] [2024-06-28 00:49:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:49:58,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:49:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:03,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:03,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893212977] [2024-06-28 00:50:03,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893212977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:03,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:03,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:50:03,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171919531] [2024-06-28 00:50:03,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:03,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:50:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:50:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:50:03,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:50:03,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 689 transitions, 14494 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:50:03,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:03,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:50:03,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:06,067 INFO L124 PetriNetUnfolderBase]: 5909/9466 cut-off events. [2024-06-28 00:50:06,068 INFO L125 PetriNetUnfolderBase]: For 891556/891559 co-relation queries the response was YES. [2024-06-28 00:50:06,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86326 conditions, 9466 events. 5909/9466 cut-off events. For 891556/891559 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 64836 event pairs, 1327 based on Foata normal form. 6/9467 useless extension candidates. Maximal degree in co-relation 86127. Up to 7560 conditions per place. [2024-06-28 00:50:06,211 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 408 selfloop transitions, 329 changer transitions 0/742 dead transitions. [2024-06-28 00:50:06,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 742 transitions, 17011 flow [2024-06-28 00:50:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:50:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:50:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 00:50:06,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 00:50:06,212 INFO L175 Difference]: Start difference. First operand has 444 places, 689 transitions, 14494 flow. Second operand 10 states and 186 transitions. [2024-06-28 00:50:06,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 742 transitions, 17011 flow [2024-06-28 00:50:10,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 742 transitions, 16496 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-28 00:50:10,501 INFO L231 Difference]: Finished difference. Result has 447 places, 692 transitions, 14711 flow [2024-06-28 00:50:10,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14009, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14711, PETRI_PLACES=447, PETRI_TRANSITIONS=692} [2024-06-28 00:50:10,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-28 00:50:10,502 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 692 transitions, 14711 flow [2024-06-28 00:50:10,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:50:10,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:10,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:10,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 00:50:10,502 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:50:10,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:10,503 INFO L85 PathProgramCache]: Analyzing trace with hash 958186550, now seen corresponding path program 4 times [2024-06-28 00:50:10,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:10,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278397995] [2024-06-28 00:50:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:10,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:14,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278397995] [2024-06-28 00:50:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278397995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:14,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:14,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:50:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135171926] [2024-06-28 00:50:14,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:14,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:50:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:14,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:50:14,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:50:14,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:50:14,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 692 transitions, 14711 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:50:14,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:14,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:50:14,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15