./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe019_power.opt.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/safe019_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe019_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:21:16,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:21:16,824 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:21:16,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:21:16,829 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:21:16,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:21:16,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:21:16,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:21:16,854 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:21:16,857 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:21:16,857 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:21:16,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:21:16,858 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:21:16,859 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:21:16,859 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:21:16,860 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:21:16,860 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:21:16,860 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:21:16,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:21:16,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:21:16,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:21:16,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:21:16,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:21:16,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:21:16,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:21:16,862 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:21:16,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:21:16,862 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:21:16,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:21:16,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:21:16,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:21:16,864 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:21:16,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:21:16,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:21:16,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:21:16,865 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:21:16,865 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:21:16,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:21:16,866 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:21:16,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:21:16,866 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:21:16,866 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:21:16,866 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:21:16,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:21:17,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:21:17,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:21:17,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:21:17,112 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:21:17,112 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:21:17,113 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe019_power.opt.yml/witness.yml [2024-06-27 21:21:17,318 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:21:17,319 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:21:17,319 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-27 21:21:18,388 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:21:18,580 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:21:18,581 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-27 21:21:18,592 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69ca76ad/895ce30e29cb46a0a38deba520299dc5/FLAG5845c03ae [2024-06-27 21:21:18,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69ca76ad/895ce30e29cb46a0a38deba520299dc5 [2024-06-27 21:21:18,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:21:18,607 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:21:18,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:21:18,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:21:18,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:21:18,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:21:17" (1/2) ... [2024-06-27 21:21:18,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f957ef7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:18, skipping insertion in model container [2024-06-27 21:21:18,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:21:17" (1/2) ... [2024-06-27 21:21:18,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2882cd33 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:18, skipping insertion in model container [2024-06-27 21:21:18,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:21:18" (2/2) ... [2024-06-27 21:21:18,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f957ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:18, skipping insertion in model container [2024-06-27 21:21:18,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:21:18" (2/2) ... [2024-06-27 21:21:18,615 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:21:18,835 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:21:18,836 INFO L97 edCorrectnessWitness]: Location invariant before [L885-L885] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-27 21:21:18,836 INFO L97 edCorrectnessWitness]: Location invariant before [L889-L889] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-27 21:21:18,836 INFO L97 edCorrectnessWitness]: Location invariant before [L887-L887] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-27 21:21:18,836 INFO L97 edCorrectnessWitness]: Location invariant before [L890-L890] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-27 21:21:18,836 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:21:18,837 INFO L106 edCorrectnessWitness]: ghost_update [L883-L883] multithreaded = 1; [2024-06-27 21:21:18,873 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:21:19,244 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:21:19,257 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:21:19,369 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:21:19,399 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:21:19,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19 WrapperNode [2024-06-27 21:21:19,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:21:19,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:21:19,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:21:19,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:21:19,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,449 INFO L138 Inliner]: procedures = 176, calls = 89, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 241 [2024-06-27 21:21:19,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:21:19,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:21:19,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:21:19,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:21:19,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,467 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,488 INFO L175 MemorySlicer]: Split 42 memory accesses to 2 slices as follows [40, 2]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 8 writes are split as follows [8, 0]. [2024-06-27 21:21:19,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,513 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,515 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,529 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:21:19,537 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:21:19,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:21:19,538 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:21:19,538 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (1/1) ... [2024-06-27 21:21:19,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:21:19,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:21:19,581 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) [2024-06-27 21:21:19,624 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 [2024-06-27 21:21:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:21:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:21:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:21:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:21:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:21:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:21:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:21:19,649 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:21:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:21:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:21:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:21:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:21:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:21:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:21:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:21:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:21:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:21:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:21:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:21:19,653 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:21:19,802 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:21:19,804 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:21:20,327 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:21:20,328 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:21:20,732 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:21:20,732 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:21:20,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:21:20 BoogieIcfgContainer [2024-06-27 21:21:20,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:21:20,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:21:20,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:21:20,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:21:20,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:21:17" (1/4) ... [2024-06-27 21:21:20,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70eeeaa8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:21:20, skipping insertion in model container [2024-06-27 21:21:20,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:21:18" (2/4) ... [2024-06-27 21:21:20,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70eeeaa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:21:20, skipping insertion in model container [2024-06-27 21:21:20,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:19" (3/4) ... [2024-06-27 21:21:20,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70eeeaa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:21:20, skipping insertion in model container [2024-06-27 21:21:20,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:21:20" (4/4) ... [2024-06-27 21:21:20,741 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2024-06-27 21:21:20,754 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:21:20,754 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:21:20,755 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:21:20,819 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:21:20,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:21:20,867 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 21:21:20,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:21:20,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:21:20,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:21:20,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 21:21:20,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:21:20,882 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;@30ee7146, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:21:20,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:21:20,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:21:20,886 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:21:20,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:21:20,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:20,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:21:20,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:20,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash 897874671, now seen corresponding path program 1 times [2024-06-27 21:21:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:20,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768992810] [2024-06-27 21:21:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:22,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:22,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768992810] [2024-06-27 21:21:22,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768992810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:22,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:22,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:21:22,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581537285] [2024-06-27 21:21:22,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:22,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:21:22,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:21:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:21:22,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:21:22,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:22,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:22,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:21:22,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:24,341 INFO L124 PetriNetUnfolderBase]: 6711/9234 cut-off events. [2024-06-27 21:21:24,341 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-06-27 21:21:24,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18754 conditions, 9234 events. 6711/9234 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48183 event pairs, 4089 based on Foata normal form. 2/9089 useless extension candidates. Maximal degree in co-relation 18741. Up to 9183 conditions per place. [2024-06-27 21:21:24,386 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 48 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-27 21:21:24,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 247 flow [2024-06-27 21:21:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:21:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:21:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-27 21:21:24,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 21:21:24,397 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 90 transitions. [2024-06-27 21:21:24,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 247 flow [2024-06-27 21:21:24,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:24,402 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 21:21:24,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 21:21:24,406 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 21:21:24,406 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 21:21:24,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:24,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:24,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:24,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:21:24,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:24,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1487457511, now seen corresponding path program 1 times [2024-06-27 21:21:24,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:24,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423329250] [2024-06-27 21:21:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:24,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:27,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423329250] [2024-06-27 21:21:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423329250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:27,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:27,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:21:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468626938] [2024-06-27 21:21:27,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:27,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:21:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:27,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:21:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:21:27,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:27,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:27,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:29,639 INFO L124 PetriNetUnfolderBase]: 8525/11671 cut-off events. [2024-06-27 21:21:29,639 INFO L125 PetriNetUnfolderBase]: For 2111/2111 co-relation queries the response was YES. [2024-06-27 21:21:29,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26843 conditions, 11671 events. 8525/11671 cut-off events. For 2111/2111 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59579 event pairs, 4020 based on Foata normal form. 8/11668 useless extension candidates. Maximal degree in co-relation 26831. Up to 11534 conditions per place. [2024-06-27 21:21:29,686 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 59 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-06-27 21:21:29,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 333 flow [2024-06-27 21:21:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:21:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:21:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-27 21:21:29,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336538461538461 [2024-06-27 21:21:29,689 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 111 transitions. [2024-06-27 21:21:29,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 333 flow [2024-06-27 21:21:29,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:21:29,691 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 166 flow [2024-06-27 21:21:29,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-27 21:21:29,692 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-06-27 21:21:29,692 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 166 flow [2024-06-27 21:21:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:29,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:29,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:29,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:21:29,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:29,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:29,693 INFO L85 PathProgramCache]: Analyzing trace with hash -960974621, now seen corresponding path program 1 times [2024-06-27 21:21:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:29,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939559672] [2024-06-27 21:21:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:29,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:31,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939559672] [2024-06-27 21:21:31,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939559672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:31,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:31,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:21:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410181164] [2024-06-27 21:21:31,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:31,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:21:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:21:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:21:31,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:31,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:31,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:31,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:31,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:32,894 INFO L124 PetriNetUnfolderBase]: 6713/9255 cut-off events. [2024-06-27 21:21:32,895 INFO L125 PetriNetUnfolderBase]: For 4637/4637 co-relation queries the response was YES. [2024-06-27 21:21:32,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23400 conditions, 9255 events. 6713/9255 cut-off events. For 4637/4637 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48557 event pairs, 3676 based on Foata normal form. 6/9256 useless extension candidates. Maximal degree in co-relation 23385. Up to 9173 conditions per place. [2024-06-27 21:21:32,932 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 63 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-27 21:21:32,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 406 flow [2024-06-27 21:21:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:21:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:21:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 21:21:32,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576923076923077 [2024-06-27 21:21:32,938 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 166 flow. Second operand 5 states and 119 transitions. [2024-06-27 21:21:32,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 406 flow [2024-06-27 21:21:32,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 382 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:21:32,943 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 232 flow [2024-06-27 21:21:32,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-27 21:21:32,944 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-06-27 21:21:32,944 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 232 flow [2024-06-27 21:21:32,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:32,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:32,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:32,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:21:32,945 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:32,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:32,946 INFO L85 PathProgramCache]: Analyzing trace with hash 274559189, now seen corresponding path program 1 times [2024-06-27 21:21:32,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:32,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680337909] [2024-06-27 21:21:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:32,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:35,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680337909] [2024-06-27 21:21:35,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680337909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:35,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:35,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:21:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214882676] [2024-06-27 21:21:35,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:35,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:21:35,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:21:35,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:21:35,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:35,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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) [2024-06-27 21:21:35,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:35,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:35,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:37,377 INFO L124 PetriNetUnfolderBase]: 6731/9280 cut-off events. [2024-06-27 21:21:37,377 INFO L125 PetriNetUnfolderBase]: For 9348/9348 co-relation queries the response was YES. [2024-06-27 21:21:37,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26684 conditions, 9280 events. 6731/9280 cut-off events. For 9348/9348 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48188 event pairs, 3546 based on Foata normal form. 6/9281 useless extension candidates. Maximal degree in co-relation 26666. Up to 9160 conditions per place. [2024-06-27 21:21:37,414 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-06-27 21:21:37,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 514 flow [2024-06-27 21:21:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 21:21:37,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:21:37,416 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 232 flow. Second operand 6 states and 143 transitions. [2024-06-27 21:21:37,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 514 flow [2024-06-27 21:21:37,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 494 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 21:21:37,420 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 292 flow [2024-06-27 21:21:37,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 21:21:37,421 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 21:21:37,421 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 292 flow [2024-06-27 21:21:37,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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) [2024-06-27 21:21:37,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:37,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:37,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:21:37,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:37,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash -78598334, now seen corresponding path program 1 times [2024-06-27 21:21:37,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:37,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267974614] [2024-06-27 21:21:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:37,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:39,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:39,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267974614] [2024-06-27 21:21:39,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267974614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:39,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:39,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:21:39,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946805282] [2024-06-27 21:21:39,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:39,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:21:39,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:39,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:21:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:21:39,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:39,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:39,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:39,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:39,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:41,544 INFO L124 PetriNetUnfolderBase]: 6716/9259 cut-off events. [2024-06-27 21:21:41,544 INFO L125 PetriNetUnfolderBase]: For 15501/15501 co-relation queries the response was YES. [2024-06-27 21:21:41,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29775 conditions, 9259 events. 6716/9259 cut-off events. For 15501/15501 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48041 event pairs, 3407 based on Foata normal form. 6/9260 useless extension candidates. Maximal degree in co-relation 29755. Up to 9139 conditions per place. [2024-06-27 21:21:41,594 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 89 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-27 21:21:41,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 112 transitions, 682 flow [2024-06-27 21:21:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 21:21:41,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-27 21:21:41,600 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 292 flow. Second operand 7 states and 164 transitions. [2024-06-27 21:21:41,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 112 transitions, 682 flow [2024-06-27 21:21:41,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 112 transitions, 620 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:41,607 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 380 flow [2024-06-27 21:21:41,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-27 21:21:41,608 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-27 21:21:41,608 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 380 flow [2024-06-27 21:21:41,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:41,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:41,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:41,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:21:41,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:41,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1680922618, now seen corresponding path program 1 times [2024-06-27 21:21:41,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:41,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14342838] [2024-06-27 21:21:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:43,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14342838] [2024-06-27 21:21:43,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14342838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:43,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:43,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:21:43,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687925443] [2024-06-27 21:21:43,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:43,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:21:43,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:21:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:21:43,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:21:43,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 380 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:43,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:43,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:21:43,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:46,057 INFO L124 PetriNetUnfolderBase]: 8504/11653 cut-off events. [2024-06-27 21:21:46,058 INFO L125 PetriNetUnfolderBase]: For 25990/25990 co-relation queries the response was YES. [2024-06-27 21:21:46,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38860 conditions, 11653 events. 8504/11653 cut-off events. For 25990/25990 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59312 event pairs, 3922 based on Foata normal form. 3/11645 useless extension candidates. Maximal degree in co-relation 38837. Up to 11474 conditions per place. [2024-06-27 21:21:46,108 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 74 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-27 21:21:46,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 662 flow [2024-06-27 21:21:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:21:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:21:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:21:46,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-27 21:21:46,110 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 380 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:21:46,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 662 flow [2024-06-27 21:21:46,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 631 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 21:21:46,124 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 452 flow [2024-06-27 21:21:46,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-27 21:21:46,125 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-27 21:21:46,125 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 452 flow [2024-06-27 21:21:46,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:46,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:46,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:46,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:21:46,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:46,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:46,126 INFO L85 PathProgramCache]: Analyzing trace with hash -818526892, now seen corresponding path program 1 times [2024-06-27 21:21:46,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:46,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201814432] [2024-06-27 21:21:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:46,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201814432] [2024-06-27 21:21:49,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201814432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:49,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:49,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:49,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292595078] [2024-06-27 21:21:49,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:49,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:49,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:49,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:49,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:49,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:21:49,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 452 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:49,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:49,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:21:49,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:51,851 INFO L124 PetriNetUnfolderBase]: 8531/11700 cut-off events. [2024-06-27 21:21:51,852 INFO L125 PetriNetUnfolderBase]: For 35989/35989 co-relation queries the response was YES. [2024-06-27 21:21:51,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41976 conditions, 11700 events. 8531/11700 cut-off events. For 35989/35989 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59568 event pairs, 3792 based on Foata normal form. 3/11692 useless extension candidates. Maximal degree in co-relation 41951. Up to 11425 conditions per place. [2024-06-27 21:21:51,935 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 76 selfloop transitions, 32 changer transitions 0/113 dead transitions. [2024-06-27 21:21:51,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 792 flow [2024-06-27 21:21:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 21:21:51,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-27 21:21:51,938 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 452 flow. Second operand 6 states and 142 transitions. [2024-06-27 21:21:51,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 792 flow [2024-06-27 21:21:51,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 725 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:51,956 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 520 flow [2024-06-27 21:21:51,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-06-27 21:21:51,957 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-27 21:21:51,957 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 520 flow [2024-06-27 21:21:51,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:51,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:51,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:51,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:21:51,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:51,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:51,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1621238742, now seen corresponding path program 2 times [2024-06-27 21:21:51,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:51,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077659742] [2024-06-27 21:21:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:51,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:54,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:54,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077659742] [2024-06-27 21:21:54,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077659742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:54,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:54,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:54,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192140084] [2024-06-27 21:21:54,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:54,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:54,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:54,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:54,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:21:54,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 520 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:54,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:54,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:21:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:56,906 INFO L124 PetriNetUnfolderBase]: 8522/11688 cut-off events. [2024-06-27 21:21:56,906 INFO L125 PetriNetUnfolderBase]: For 36934/36934 co-relation queries the response was YES. [2024-06-27 21:21:56,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42076 conditions, 11688 events. 8522/11688 cut-off events. For 36934/36934 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 60024 event pairs, 3792 based on Foata normal form. 3/11680 useless extension candidates. Maximal degree in co-relation 42050. Up to 11394 conditions per place. [2024-06-27 21:21:56,970 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 85 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-27 21:21:56,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 126 transitions, 910 flow [2024-06-27 21:21:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 21:21:56,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-27 21:21:56,972 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 520 flow. Second operand 7 states and 164 transitions. [2024-06-27 21:21:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 126 transitions, 910 flow [2024-06-27 21:21:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 126 transitions, 841 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:56,997 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 586 flow [2024-06-27 21:21:56,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=586, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-27 21:21:56,998 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-27 21:21:56,998 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 586 flow [2024-06-27 21:21:56,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:56,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:56,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:56,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:21:56,998 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:56,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -895259711, now seen corresponding path program 1 times [2024-06-27 21:21:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:56,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126034075] [2024-06-27 21:21:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:56,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:58,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:58,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126034075] [2024-06-27 21:21:58,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126034075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:58,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:58,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:21:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649766847] [2024-06-27 21:21:58,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:58,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:21:58,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:21:58,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:21:58,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:58,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 586 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:58,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:58,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:58,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:00,596 INFO L124 PetriNetUnfolderBase]: 6711/9254 cut-off events. [2024-06-27 21:22:00,597 INFO L125 PetriNetUnfolderBase]: For 40137/40137 co-relation queries the response was YES. [2024-06-27 21:22:00,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36826 conditions, 9254 events. 6711/9254 cut-off events. For 40137/40137 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 47975 event pairs, 3242 based on Foata normal form. 4/9249 useless extension candidates. Maximal degree in co-relation 36799. Up to 9155 conditions per place. [2024-06-27 21:22:00,652 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 87 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2024-06-27 21:22:00,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 874 flow [2024-06-27 21:22:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:22:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:22:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-27 21:22:00,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:22:00,653 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 586 flow. Second operand 5 states and 115 transitions. [2024-06-27 21:22:00,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 874 flow [2024-06-27 21:22:00,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 106 transitions, 771 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:00,668 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 563 flow [2024-06-27 21:22:00,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=563, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-06-27 21:22:00,669 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-27 21:22:00,669 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 563 flow [2024-06-27 21:22:00,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:00,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:00,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:00,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:22:00,670 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:00,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1895230581, now seen corresponding path program 1 times [2024-06-27 21:22:00,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:00,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080658716] [2024-06-27 21:22:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:00,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:02,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080658716] [2024-06-27 21:22:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080658716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:02,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:02,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:02,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882362856] [2024-06-27 21:22:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:02,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:02,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:02,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 563 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:02,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:02,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:02,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:05,245 INFO L124 PetriNetUnfolderBase]: 8545/11725 cut-off events. [2024-06-27 21:22:05,246 INFO L125 PetriNetUnfolderBase]: For 58436/58436 co-relation queries the response was YES. [2024-06-27 21:22:05,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47712 conditions, 11725 events. 8545/11725 cut-off events. For 58436/58436 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59682 event pairs, 2872 based on Foata normal form. 6/11720 useless extension candidates. Maximal degree in co-relation 47684. Up to 11520 conditions per place. [2024-06-27 21:22:05,306 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 104 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-27 21:22:05,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 921 flow [2024-06-27 21:22:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:22:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:22:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 21:22:05,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:22:05,308 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 563 flow. Second operand 6 states and 138 transitions. [2024-06-27 21:22:05,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 921 flow [2024-06-27 21:22:05,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 877 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:22:05,358 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 603 flow [2024-06-27 21:22:05,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=603, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-27 21:22:05,360 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-27 21:22:05,360 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 603 flow [2024-06-27 21:22:05,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:05,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:05,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:05,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:22:05,376 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:05,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 395466563, now seen corresponding path program 2 times [2024-06-27 21:22:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:05,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194757886] [2024-06-27 21:22:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:05,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194757886] [2024-06-27 21:22:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194757886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:07,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331582273] [2024-06-27 21:22:07,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:07,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:07,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:07,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 603 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:07,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:07,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:07,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:10,067 INFO L124 PetriNetUnfolderBase]: 8530/11704 cut-off events. [2024-06-27 21:22:10,067 INFO L125 PetriNetUnfolderBase]: For 69636/69636 co-relation queries the response was YES. [2024-06-27 21:22:10,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49775 conditions, 11704 events. 8530/11704 cut-off events. For 69636/69636 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59594 event pairs, 3478 based on Foata normal form. 6/11699 useless extension candidates. Maximal degree in co-relation 49746. Up to 11467 conditions per place. [2024-06-27 21:22:10,122 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 99 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-27 21:22:10,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 973 flow [2024-06-27 21:22:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:22:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:22:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 21:22:10,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-27 21:22:10,124 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 603 flow. Second operand 6 states and 140 transitions. [2024-06-27 21:22:10,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 973 flow [2024-06-27 21:22:10,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 915 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:10,156 INFO L231 Difference]: Finished difference. Result has 83 places, 93 transitions, 652 flow [2024-06-27 21:22:10,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=652, PETRI_PLACES=83, PETRI_TRANSITIONS=93} [2024-06-27 21:22:10,156 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-27 21:22:10,156 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 93 transitions, 652 flow [2024-06-27 21:22:10,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:10,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:10,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:10,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:22:10,157 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:10,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash 395471523, now seen corresponding path program 1 times [2024-06-27 21:22:10,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:10,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101734483] [2024-06-27 21:22:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:10,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:13,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:13,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101734483] [2024-06-27 21:22:13,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101734483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:13,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:13,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:13,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900594532] [2024-06-27 21:22:13,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:13,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:13,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:13,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:13,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:13,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:13,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 652 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:13,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:13,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:13,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:15,704 INFO L124 PetriNetUnfolderBase]: 8686/11960 cut-off events. [2024-06-27 21:22:15,704 INFO L125 PetriNetUnfolderBase]: For 87222/87222 co-relation queries the response was YES. [2024-06-27 21:22:15,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53230 conditions, 11960 events. 8686/11960 cut-off events. For 87222/87222 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61438 event pairs, 3133 based on Foata normal form. 24/11973 useless extension candidates. Maximal degree in co-relation 53200. Up to 11289 conditions per place. [2024-06-27 21:22:15,785 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 99 selfloop transitions, 39 changer transitions 0/143 dead transitions. [2024-06-27 21:22:15,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 143 transitions, 1102 flow [2024-06-27 21:22:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 21:22:15,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:22:15,787 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 652 flow. Second operand 7 states and 169 transitions. [2024-06-27 21:22:15,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 143 transitions, 1102 flow [2024-06-27 21:22:15,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 143 transitions, 1023 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:15,843 INFO L231 Difference]: Finished difference. Result has 86 places, 95 transitions, 717 flow [2024-06-27 21:22:15,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=717, PETRI_PLACES=86, PETRI_TRANSITIONS=95} [2024-06-27 21:22:15,844 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-27 21:22:15,844 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 95 transitions, 717 flow [2024-06-27 21:22:15,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:15,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:15,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:15,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:22:15,845 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:15,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1281214459, now seen corresponding path program 2 times [2024-06-27 21:22:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626404373] [2024-06-27 21:22:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:15,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626404373] [2024-06-27 21:22:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626404373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:18,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:18,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549280810] [2024-06-27 21:22:18,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:18,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:18,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 95 transitions, 717 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:18,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:18,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:18,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:21,081 INFO L124 PetriNetUnfolderBase]: 9061/12533 cut-off events. [2024-06-27 21:22:21,082 INFO L125 PetriNetUnfolderBase]: For 107207/107207 co-relation queries the response was YES. [2024-06-27 21:22:21,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58409 conditions, 12533 events. 9061/12533 cut-off events. For 107207/107207 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 65104 event pairs, 3197 based on Foata normal form. 18/12540 useless extension candidates. Maximal degree in co-relation 58378. Up to 11521 conditions per place. [2024-06-27 21:22:21,159 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 115 selfloop transitions, 44 changer transitions 0/164 dead transitions. [2024-06-27 21:22:21,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 164 transitions, 1417 flow [2024-06-27 21:22:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 21:22:21,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-27 21:22:21,168 INFO L175 Difference]: Start difference. First operand has 86 places, 95 transitions, 717 flow. Second operand 8 states and 194 transitions. [2024-06-27 21:22:21,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 164 transitions, 1417 flow [2024-06-27 21:22:21,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 164 transitions, 1311 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:21,240 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 876 flow [2024-06-27 21:22:21,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=876, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-06-27 21:22:21,240 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-27 21:22:21,240 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 876 flow [2024-06-27 21:22:21,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:21,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:21,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:21,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:22:21,241 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:21,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:21,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1281207949, now seen corresponding path program 3 times [2024-06-27 21:22:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391795188] [2024-06-27 21:22:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:24,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391795188] [2024-06-27 21:22:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391795188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:24,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:24,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:24,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156576162] [2024-06-27 21:22:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:24,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:24,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:24,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 876 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:24,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:24,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:24,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:27,669 INFO L124 PetriNetUnfolderBase]: 9425/13086 cut-off events. [2024-06-27 21:22:27,669 INFO L125 PetriNetUnfolderBase]: For 111150/111150 co-relation queries the response was YES. [2024-06-27 21:22:27,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61340 conditions, 13086 events. 9425/13086 cut-off events. For 111150/111150 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 68713 event pairs, 3557 based on Foata normal form. 24/13106 useless extension candidates. Maximal degree in co-relation 61307. Up to 12627 conditions per place. [2024-06-27 21:22:27,741 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 173 selfloop transitions, 42 changer transitions 0/220 dead transitions. [2024-06-27 21:22:27,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 220 transitions, 1880 flow [2024-06-27 21:22:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:22:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:22:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-27 21:22:27,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44755244755244755 [2024-06-27 21:22:27,744 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 876 flow. Second operand 11 states and 256 transitions. [2024-06-27 21:22:27,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 220 transitions, 1880 flow [2024-06-27 21:22:27,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 220 transitions, 1791 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:27,858 INFO L231 Difference]: Finished difference. Result has 103 places, 137 transitions, 1333 flow [2024-06-27 21:22:27,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1333, PETRI_PLACES=103, PETRI_TRANSITIONS=137} [2024-06-27 21:22:27,859 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-27 21:22:27,859 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 137 transitions, 1333 flow [2024-06-27 21:22:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:27,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:27,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:27,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:22:27,860 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:27,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash 216097199, now seen corresponding path program 4 times [2024-06-27 21:22:27,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:27,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607810839] [2024-06-27 21:22:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:27,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:30,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:30,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607810839] [2024-06-27 21:22:30,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607810839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:30,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:30,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733889455] [2024-06-27 21:22:30,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:30,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:30,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:30,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:30,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 1333 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:30,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:30,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:30,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:33,502 INFO L124 PetriNetUnfolderBase]: 9371/13002 cut-off events. [2024-06-27 21:22:33,502 INFO L125 PetriNetUnfolderBase]: For 120067/120067 co-relation queries the response was YES. [2024-06-27 21:22:33,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62915 conditions, 13002 events. 9371/13002 cut-off events. For 120067/120067 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 68004 event pairs, 3556 based on Foata normal form. 24/13012 useless extension candidates. Maximal degree in co-relation 62874. Up to 12165 conditions per place. [2024-06-27 21:22:33,581 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 122 selfloop transitions, 65 changer transitions 0/192 dead transitions. [2024-06-27 21:22:33,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 192 transitions, 1883 flow [2024-06-27 21:22:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 21:22:33,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-27 21:22:33,583 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 1333 flow. Second operand 8 states and 188 transitions. [2024-06-27 21:22:33,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 192 transitions, 1883 flow [2024-06-27 21:22:33,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 192 transitions, 1806 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:22:33,752 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1400 flow [2024-06-27 21:22:33,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-27 21:22:33,753 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-27 21:22:33,753 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1400 flow [2024-06-27 21:22:33,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:33,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:33,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:33,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:22:33,754 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:33,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1983244602, now seen corresponding path program 1 times [2024-06-27 21:22:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:33,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339494130] [2024-06-27 21:22:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:35,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:35,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339494130] [2024-06-27 21:22:35,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339494130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:35,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:35,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:22:35,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517668933] [2024-06-27 21:22:35,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:35,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:22:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:22:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:22:35,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:35,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1400 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-27 21:22:35,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:35,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:35,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:38,755 INFO L124 PetriNetUnfolderBase]: 9397/13053 cut-off events. [2024-06-27 21:22:38,755 INFO L125 PetriNetUnfolderBase]: For 127053/127053 co-relation queries the response was YES. [2024-06-27 21:22:38,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63809 conditions, 13053 events. 9397/13053 cut-off events. For 127053/127053 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68520 event pairs, 3617 based on Foata normal form. 8/13057 useless extension candidates. Maximal degree in co-relation 63767. Up to 12843 conditions per place. [2024-06-27 21:22:38,824 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 158 selfloop transitions, 21 changer transitions 0/184 dead transitions. [2024-06-27 21:22:38,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 184 transitions, 2000 flow [2024-06-27 21:22:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:22:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:22:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 21:22:38,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:22:38,827 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1400 flow. Second operand 6 states and 138 transitions. [2024-06-27 21:22:38,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 184 transitions, 2000 flow [2024-06-27 21:22:38,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 1870 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:38,963 INFO L231 Difference]: Finished difference. Result has 110 places, 153 transitions, 1463 flow [2024-06-27 21:22:38,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1463, PETRI_PLACES=110, PETRI_TRANSITIONS=153} [2024-06-27 21:22:38,964 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-27 21:22:38,964 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 153 transitions, 1463 flow [2024-06-27 21:22:38,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-27 21:22:38,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:38,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:22:38,965 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:38,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash 634897479, now seen corresponding path program 1 times [2024-06-27 21:22:38,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:38,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241955743] [2024-06-27 21:22:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:38,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:41,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:41,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241955743] [2024-06-27 21:22:41,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241955743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:41,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:41,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:41,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65899809] [2024-06-27 21:22:41,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:41,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:41,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:41,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:41,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 153 transitions, 1463 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:41,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:41,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:41,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:44,403 INFO L124 PetriNetUnfolderBase]: 9358/12979 cut-off events. [2024-06-27 21:22:44,404 INFO L125 PetriNetUnfolderBase]: For 144015/144015 co-relation queries the response was YES. [2024-06-27 21:22:44,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66995 conditions, 12979 events. 9358/12979 cut-off events. For 144015/144015 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67688 event pairs, 2605 based on Foata normal form. 18/12983 useless extension candidates. Maximal degree in co-relation 66950. Up to 12566 conditions per place. [2024-06-27 21:22:44,504 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 171 selfloop transitions, 23 changer transitions 0/199 dead transitions. [2024-06-27 21:22:44,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 2007 flow [2024-06-27 21:22:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 21:22:44,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-27 21:22:44,513 INFO L175 Difference]: Start difference. First operand has 110 places, 153 transitions, 1463 flow. Second operand 7 states and 160 transitions. [2024-06-27 21:22:44,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 2007 flow [2024-06-27 21:22:44,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 199 transitions, 1971 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 21:22:44,712 INFO L231 Difference]: Finished difference. Result has 115 places, 154 transitions, 1508 flow [2024-06-27 21:22:44,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1508, PETRI_PLACES=115, PETRI_TRANSITIONS=154} [2024-06-27 21:22:44,719 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-27 21:22:44,719 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 154 transitions, 1508 flow [2024-06-27 21:22:44,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:44,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:44,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:44,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:22:44,719 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:44,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1355806368, now seen corresponding path program 1 times [2024-06-27 21:22:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:44,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968876266] [2024-06-27 21:22:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:47,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968876266] [2024-06-27 21:22:47,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968876266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:47,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:47,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:22:47,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042804711] [2024-06-27 21:22:47,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:47,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:22:47,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:22:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:22:47,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:47,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 154 transitions, 1508 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:47,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:47,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:47,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:49,695 INFO L124 PetriNetUnfolderBase]: 8957/12592 cut-off events. [2024-06-27 21:22:49,696 INFO L125 PetriNetUnfolderBase]: For 157578/157579 co-relation queries the response was YES. [2024-06-27 21:22:49,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66791 conditions, 12592 events. 8957/12592 cut-off events. For 157578/157579 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 66632 event pairs, 3392 based on Foata normal form. 6/12585 useless extension candidates. Maximal degree in co-relation 66743. Up to 12174 conditions per place. [2024-06-27 21:22:49,793 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 144 selfloop transitions, 32 changer transitions 0/186 dead transitions. [2024-06-27 21:22:49,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 186 transitions, 2002 flow [2024-06-27 21:22:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:22:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:22:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 21:22:49,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-06-27 21:22:49,795 INFO L175 Difference]: Start difference. First operand has 115 places, 154 transitions, 1508 flow. Second operand 6 states and 137 transitions. [2024-06-27 21:22:49,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 186 transitions, 2002 flow [2024-06-27 21:22:50,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 1925 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:50,008 INFO L231 Difference]: Finished difference. Result has 116 places, 159 transitions, 1582 flow [2024-06-27 21:22:50,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1582, PETRI_PLACES=116, PETRI_TRANSITIONS=159} [2024-06-27 21:22:50,009 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-27 21:22:50,009 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 159 transitions, 1582 flow [2024-06-27 21:22:50,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:50,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:50,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:50,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:22:50,010 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:50,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1351044768, now seen corresponding path program 2 times [2024-06-27 21:22:50,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:50,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389733544] [2024-06-27 21:22:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:50,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:51,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389733544] [2024-06-27 21:22:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389733544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:51,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:51,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:22:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950018733] [2024-06-27 21:22:51,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:51,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:22:51,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:22:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:22:52,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:52,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 159 transitions, 1582 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:52,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:52,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:52,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:54,978 INFO L124 PetriNetUnfolderBase]: 9108/12784 cut-off events. [2024-06-27 21:22:54,979 INFO L125 PetriNetUnfolderBase]: For 179763/179764 co-relation queries the response was YES. [2024-06-27 21:22:55,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71134 conditions, 12784 events. 9108/12784 cut-off events. For 179763/179764 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 67527 event pairs, 3407 based on Foata normal form. 6/12774 useless extension candidates. Maximal degree in co-relation 71085. Up to 12314 conditions per place. [2024-06-27 21:22:55,078 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 161 selfloop transitions, 32 changer transitions 0/203 dead transitions. [2024-06-27 21:22:55,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 203 transitions, 2280 flow [2024-06-27 21:22:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 21:22:55,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368131868131868 [2024-06-27 21:22:55,080 INFO L175 Difference]: Start difference. First operand has 116 places, 159 transitions, 1582 flow. Second operand 7 states and 159 transitions. [2024-06-27 21:22:55,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 203 transitions, 2280 flow [2024-06-27 21:22:55,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 203 transitions, 2171 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:55,318 INFO L231 Difference]: Finished difference. Result has 120 places, 170 transitions, 1713 flow [2024-06-27 21:22:55,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1713, PETRI_PLACES=120, PETRI_TRANSITIONS=170} [2024-06-27 21:22:55,319 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-27 21:22:55,319 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 170 transitions, 1713 flow [2024-06-27 21:22:55,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:55,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:55,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:55,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:22:55,320 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:55,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:55,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1691088379, now seen corresponding path program 1 times [2024-06-27 21:22:55,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:55,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807419475] [2024-06-27 21:22:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:55,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:57,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807419475] [2024-06-27 21:22:57,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807419475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:57,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:57,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:57,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104472450] [2024-06-27 21:22:57,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:57,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:57,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:22:57,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 170 transitions, 1713 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:57,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:57,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:22:57,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:01,460 INFO L124 PetriNetUnfolderBase]: 9907/13713 cut-off events. [2024-06-27 21:23:01,460 INFO L125 PetriNetUnfolderBase]: For 210212/210212 co-relation queries the response was YES. [2024-06-27 21:23:01,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79854 conditions, 13713 events. 9907/13713 cut-off events. For 210212/210212 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 71914 event pairs, 3354 based on Foata normal form. 16/13715 useless extension candidates. Maximal degree in co-relation 79803. Up to 13149 conditions per place. [2024-06-27 21:23:01,574 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 167 selfloop transitions, 49 changer transitions 0/221 dead transitions. [2024-06-27 21:23:01,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 221 transitions, 2532 flow [2024-06-27 21:23:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 21:23:01,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41586538461538464 [2024-06-27 21:23:01,577 INFO L175 Difference]: Start difference. First operand has 120 places, 170 transitions, 1713 flow. Second operand 8 states and 173 transitions. [2024-06-27 21:23:01,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 221 transitions, 2532 flow [2024-06-27 21:23:01,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 221 transitions, 2454 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 21:23:01,901 INFO L231 Difference]: Finished difference. Result has 127 places, 185 transitions, 1971 flow [2024-06-27 21:23:01,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1971, PETRI_PLACES=127, PETRI_TRANSITIONS=185} [2024-06-27 21:23:01,902 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-27 21:23:01,902 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 185 transitions, 1971 flow [2024-06-27 21:23:01,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:01,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:01,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:23:01,903 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:01,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1067489253, now seen corresponding path program 2 times [2024-06-27 21:23:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:01,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211805789] [2024-06-27 21:23:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:01,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:04,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:04,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211805789] [2024-06-27 21:23:04,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211805789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:04,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:04,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:04,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293164829] [2024-06-27 21:23:04,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:04,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:04,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:04,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:23:04,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 185 transitions, 1971 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:04,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:04,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:23:04,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:07,919 INFO L124 PetriNetUnfolderBase]: 10047/13911 cut-off events. [2024-06-27 21:23:07,920 INFO L125 PetriNetUnfolderBase]: For 240585/240585 co-relation queries the response was YES. [2024-06-27 21:23:07,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85457 conditions, 13911 events. 10047/13911 cut-off events. For 240585/240585 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 73054 event pairs, 3366 based on Foata normal form. 16/13913 useless extension candidates. Maximal degree in co-relation 85402. Up to 13017 conditions per place. [2024-06-27 21:23:08,045 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 180 selfloop transitions, 60 changer transitions 0/245 dead transitions. [2024-06-27 21:23:08,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 245 transitions, 2965 flow [2024-06-27 21:23:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 21:23:08,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-27 21:23:08,047 INFO L175 Difference]: Start difference. First operand has 127 places, 185 transitions, 1971 flow. Second operand 7 states and 166 transitions. [2024-06-27 21:23:08,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 245 transitions, 2965 flow [2024-06-27 21:23:08,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 245 transitions, 2880 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:08,362 INFO L231 Difference]: Finished difference. Result has 132 places, 203 transitions, 2324 flow [2024-06-27 21:23:08,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2324, PETRI_PLACES=132, PETRI_TRANSITIONS=203} [2024-06-27 21:23:08,362 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-27 21:23:08,362 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 203 transitions, 2324 flow [2024-06-27 21:23:08,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:08,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:08,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:08,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:23:08,363 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:08,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash 919587850, now seen corresponding path program 1 times [2024-06-27 21:23:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:08,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543812663] [2024-06-27 21:23:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:10,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:10,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543812663] [2024-06-27 21:23:10,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543812663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:10,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:10,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:10,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062996164] [2024-06-27 21:23:10,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:10,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:10,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:10,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 203 transitions, 2324 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:10,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:10,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:10,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:13,895 INFO L124 PetriNetUnfolderBase]: 9641/13493 cut-off events. [2024-06-27 21:23:13,896 INFO L125 PetriNetUnfolderBase]: For 273373/273513 co-relation queries the response was YES. [2024-06-27 21:23:13,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89118 conditions, 13493 events. 9641/13493 cut-off events. For 273373/273513 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 71474 event pairs, 3439 based on Foata normal form. 20/13448 useless extension candidates. Maximal degree in co-relation 89060. Up to 12982 conditions per place. [2024-06-27 21:23:14,012 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 202 selfloop transitions, 44 changer transitions 0/257 dead transitions. [2024-06-27 21:23:14,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 257 transitions, 3222 flow [2024-06-27 21:23:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 21:23:14,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-27 21:23:14,014 INFO L175 Difference]: Start difference. First operand has 132 places, 203 transitions, 2324 flow. Second operand 7 states and 163 transitions. [2024-06-27 21:23:14,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 257 transitions, 3222 flow [2024-06-27 21:23:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 257 transitions, 3134 flow, removed 43 selfloop flow, removed 1 redundant places. [2024-06-27 21:23:14,324 INFO L231 Difference]: Finished difference. Result has 140 places, 219 transitions, 2608 flow [2024-06-27 21:23:14,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2608, PETRI_PLACES=140, PETRI_TRANSITIONS=219} [2024-06-27 21:23:14,324 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-27 21:23:14,325 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 219 transitions, 2608 flow [2024-06-27 21:23:14,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:14,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:14,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:14,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:23:14,325 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:14,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1382329679, now seen corresponding path program 1 times [2024-06-27 21:23:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050209506] [2024-06-27 21:23:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:14,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050209506] [2024-06-27 21:23:16,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050209506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:16,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:16,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:16,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856945220] [2024-06-27 21:23:16,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:16,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:16,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:23:16,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 219 transitions, 2608 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:16,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:16,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:23:16,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:20,045 INFO L124 PetriNetUnfolderBase]: 10292/14239 cut-off events. [2024-06-27 21:23:20,045 INFO L125 PetriNetUnfolderBase]: For 286177/286177 co-relation queries the response was YES. [2024-06-27 21:23:20,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91590 conditions, 14239 events. 10292/14239 cut-off events. For 286177/286177 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 74621 event pairs, 3533 based on Foata normal form. 8/14243 useless extension candidates. Maximal degree in co-relation 91527. Up to 13972 conditions per place. [2024-06-27 21:23:20,178 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 251 selfloop transitions, 27 changer transitions 0/283 dead transitions. [2024-06-27 21:23:20,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 283 transitions, 3680 flow [2024-06-27 21:23:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 21:23:20,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:23:20,180 INFO L175 Difference]: Start difference. First operand has 140 places, 219 transitions, 2608 flow. Second operand 7 states and 161 transitions. [2024-06-27 21:23:20,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 283 transitions, 3680 flow [2024-06-27 21:23:20,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 283 transitions, 3586 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-27 21:23:20,578 INFO L231 Difference]: Finished difference. Result has 149 places, 241 transitions, 2894 flow [2024-06-27 21:23:20,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2894, PETRI_PLACES=149, PETRI_TRANSITIONS=241} [2024-06-27 21:23:20,579 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-27 21:23:20,579 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 241 transitions, 2894 flow [2024-06-27 21:23:20,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:20,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:20,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:20,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:23:20,580 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:20,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1382329834, now seen corresponding path program 2 times [2024-06-27 21:23:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:20,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155799439] [2024-06-27 21:23:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:23,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:23,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155799439] [2024-06-27 21:23:23,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155799439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:23,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:23,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:23,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757380796] [2024-06-27 21:23:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:23,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:23,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:23,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:23,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:23,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:23,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 241 transitions, 2894 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:23,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:23,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:23,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:26,316 INFO L124 PetriNetUnfolderBase]: 9818/13720 cut-off events. [2024-06-27 21:23:26,317 INFO L125 PetriNetUnfolderBase]: For 315597/315726 co-relation queries the response was YES. [2024-06-27 21:23:26,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93933 conditions, 13720 events. 9818/13720 cut-off events. For 315597/315726 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 72202 event pairs, 3426 based on Foata normal form. 9/13667 useless extension candidates. Maximal degree in co-relation 93864. Up to 13198 conditions per place. [2024-06-27 21:23:26,449 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 219 selfloop transitions, 39 changer transitions 0/273 dead transitions. [2024-06-27 21:23:26,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 273 transitions, 3586 flow [2024-06-27 21:23:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:23:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:23:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 21:23:26,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:23:26,451 INFO L175 Difference]: Start difference. First operand has 149 places, 241 transitions, 2894 flow. Second operand 6 states and 138 transitions. [2024-06-27 21:23:26,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 273 transitions, 3586 flow [2024-06-27 21:23:26,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 273 transitions, 3482 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-06-27 21:23:26,946 INFO L231 Difference]: Finished difference. Result has 154 places, 246 transitions, 2995 flow [2024-06-27 21:23:26,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2995, PETRI_PLACES=154, PETRI_TRANSITIONS=246} [2024-06-27 21:23:26,946 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-27 21:23:26,946 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 246 transitions, 2995 flow [2024-06-27 21:23:26,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:26,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:26,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:26,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:23:26,947 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:26,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1067287815, now seen corresponding path program 2 times [2024-06-27 21:23:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:26,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848280326] [2024-06-27 21:23:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:29,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848280326] [2024-06-27 21:23:29,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848280326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:29,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:29,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:29,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325349069] [2024-06-27 21:23:29,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:29,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:29,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:29,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:29,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:29,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:23:29,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 246 transitions, 2995 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:29,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:29,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:23:29,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:32,753 INFO L124 PetriNetUnfolderBase]: 10382/14351 cut-off events. [2024-06-27 21:23:32,754 INFO L125 PetriNetUnfolderBase]: For 349176/349176 co-relation queries the response was YES. [2024-06-27 21:23:32,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100257 conditions, 14351 events. 10382/14351 cut-off events. For 349176/349176 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 75226 event pairs, 3487 based on Foata normal form. 8/14355 useless extension candidates. Maximal degree in co-relation 100185. Up to 13949 conditions per place. [2024-06-27 21:23:32,897 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 262 selfloop transitions, 38 changer transitions 0/305 dead transitions. [2024-06-27 21:23:32,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 305 transitions, 4173 flow [2024-06-27 21:23:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 21:23:32,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:23:32,920 INFO L175 Difference]: Start difference. First operand has 154 places, 246 transitions, 2995 flow. Second operand 7 states and 161 transitions. [2024-06-27 21:23:32,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 305 transitions, 4173 flow [2024-06-27 21:23:33,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 305 transitions, 4032 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:33,451 INFO L231 Difference]: Finished difference. Result has 158 places, 262 transitions, 3193 flow [2024-06-27 21:23:33,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3193, PETRI_PLACES=158, PETRI_TRANSITIONS=262} [2024-06-27 21:23:33,452 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2024-06-27 21:23:33,452 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 262 transitions, 3193 flow [2024-06-27 21:23:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:33,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:33,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:23:33,453 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:33,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1067287660, now seen corresponding path program 3 times [2024-06-27 21:23:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:33,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560682035] [2024-06-27 21:23:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:36,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:36,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560682035] [2024-06-27 21:23:36,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560682035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:36,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:36,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:36,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821800997] [2024-06-27 21:23:36,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:36,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:36,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:36,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:36,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:36,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 262 transitions, 3193 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:36,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:36,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:36,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:39,992 INFO L124 PetriNetUnfolderBase]: 9927/13858 cut-off events. [2024-06-27 21:23:39,993 INFO L125 PetriNetUnfolderBase]: For 376839/376975 co-relation queries the response was YES. [2024-06-27 21:23:40,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101230 conditions, 13858 events. 9927/13858 cut-off events. For 376839/376975 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 72972 event pairs, 3450 based on Foata normal form. 9/13801 useless extension candidates. Maximal degree in co-relation 101156. Up to 13340 conditions per place. [2024-06-27 21:23:40,123 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 239 selfloop transitions, 42 changer transitions 0/298 dead transitions. [2024-06-27 21:23:40,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 298 transitions, 3960 flow [2024-06-27 21:23:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 21:23:40,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-27 21:23:40,125 INFO L175 Difference]: Start difference. First operand has 158 places, 262 transitions, 3193 flow. Second operand 7 states and 154 transitions. [2024-06-27 21:23:40,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 298 transitions, 3960 flow [2024-06-27 21:23:40,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 298 transitions, 3780 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-27 21:23:40,579 INFO L231 Difference]: Finished difference. Result has 163 places, 270 transitions, 3266 flow [2024-06-27 21:23:40,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3266, PETRI_PLACES=163, PETRI_TRANSITIONS=270} [2024-06-27 21:23:40,581 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-27 21:23:40,581 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 270 transitions, 3266 flow [2024-06-27 21:23:40,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:40,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:40,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:40,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:23:40,581 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:40,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1067495205, now seen corresponding path program 3 times [2024-06-27 21:23:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:40,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111628059] [2024-06-27 21:23:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:40,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:43,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:43,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111628059] [2024-06-27 21:23:43,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111628059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:43,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:43,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:43,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792712200] [2024-06-27 21:23:43,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:43,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:43,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:43,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:43,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:43,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:23:43,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 270 transitions, 3266 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:43,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:43,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:23:43,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:47,002 INFO L124 PetriNetUnfolderBase]: 10458/14457 cut-off events. [2024-06-27 21:23:47,003 INFO L125 PetriNetUnfolderBase]: For 409045/409045 co-relation queries the response was YES. [2024-06-27 21:23:47,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106959 conditions, 14457 events. 10458/14457 cut-off events. For 409045/409045 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 75483 event pairs, 3511 based on Foata normal form. 8/14461 useless extension candidates. Maximal degree in co-relation 106882. Up to 14236 conditions per place. [2024-06-27 21:23:47,135 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 286 selfloop transitions, 27 changer transitions 0/318 dead transitions. [2024-06-27 21:23:47,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 318 transitions, 4270 flow [2024-06-27 21:23:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 21:23:47,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42032967032967034 [2024-06-27 21:23:47,137 INFO L175 Difference]: Start difference. First operand has 163 places, 270 transitions, 3266 flow. Second operand 7 states and 153 transitions. [2024-06-27 21:23:47,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 318 transitions, 4270 flow [2024-06-27 21:23:47,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 318 transitions, 4110 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:47,721 INFO L231 Difference]: Finished difference. Result has 168 places, 285 transitions, 3396 flow [2024-06-27 21:23:47,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3396, PETRI_PLACES=168, PETRI_TRANSITIONS=285} [2024-06-27 21:23:47,722 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-27 21:23:47,722 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 285 transitions, 3396 flow [2024-06-27 21:23:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:47,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:47,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:47,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:23:47,723 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:47,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1067503141, now seen corresponding path program 1 times [2024-06-27 21:23:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232386483] [2024-06-27 21:23:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:51,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232386483] [2024-06-27 21:23:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232386483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:51,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:51,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862684193] [2024-06-27 21:23:51,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:51,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:51,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:23:51,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 285 transitions, 3396 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-27 21:23:51,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:51,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:23:51,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:55,569 INFO L124 PetriNetUnfolderBase]: 10542/14570 cut-off events. [2024-06-27 21:23:55,569 INFO L125 PetriNetUnfolderBase]: For 438462/438462 co-relation queries the response was YES. [2024-06-27 21:23:55,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110858 conditions, 14570 events. 10542/14570 cut-off events. For 438462/438462 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 76396 event pairs, 3505 based on Foata normal form. 16/14582 useless extension candidates. Maximal degree in co-relation 110778. Up to 14237 conditions per place. [2024-06-27 21:23:55,722 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 290 selfloop transitions, 34 changer transitions 0/329 dead transitions. [2024-06-27 21:23:55,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 329 transitions, 4384 flow [2024-06-27 21:23:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 21:23:55,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-27 21:23:55,724 INFO L175 Difference]: Start difference. First operand has 168 places, 285 transitions, 3396 flow. Second operand 7 states and 160 transitions. [2024-06-27 21:23:55,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 329 transitions, 4384 flow [2024-06-27 21:23:56,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 329 transitions, 4288 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 21:23:56,371 INFO L231 Difference]: Finished difference. Result has 172 places, 288 transitions, 3451 flow [2024-06-27 21:23:56,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3451, PETRI_PLACES=172, PETRI_TRANSITIONS=288} [2024-06-27 21:23:56,376 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-27 21:23:56,376 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 288 transitions, 3451 flow [2024-06-27 21:23:56,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-27 21:23:56,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:56,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:56,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:23:56,376 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:56,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:56,377 INFO L85 PathProgramCache]: Analyzing trace with hash 94593685, now seen corresponding path program 1 times [2024-06-27 21:23:56,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:56,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784643602] [2024-06-27 21:23:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:56,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:00,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:00,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784643602] [2024-06-27 21:24:00,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784643602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:00,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:00,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:00,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277372225] [2024-06-27 21:24:00,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:00,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:00,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:00,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:00,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:00,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 288 transitions, 3451 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:00,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:00,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:00,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:04,567 INFO L124 PetriNetUnfolderBase]: 10607/14795 cut-off events. [2024-06-27 21:24:04,567 INFO L125 PetriNetUnfolderBase]: For 494577/494682 co-relation queries the response was YES. [2024-06-27 21:24:04,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116441 conditions, 14795 events. 10607/14795 cut-off events. For 494577/494682 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 78469 event pairs, 3043 based on Foata normal form. 44/14804 useless extension candidates. Maximal degree in co-relation 116360. Up to 12769 conditions per place. [2024-06-27 21:24:04,704 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 233 selfloop transitions, 105 changer transitions 0/359 dead transitions. [2024-06-27 21:24:04,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 359 transitions, 4912 flow [2024-06-27 21:24:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 21:24:04,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:24:04,705 INFO L175 Difference]: Start difference. First operand has 172 places, 288 transitions, 3451 flow. Second operand 8 states and 200 transitions. [2024-06-27 21:24:04,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 359 transitions, 4912 flow [2024-06-27 21:24:05,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 359 transitions, 4808 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:05,288 INFO L231 Difference]: Finished difference. Result has 178 places, 301 transitions, 4002 flow [2024-06-27 21:24:05,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3347, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4002, PETRI_PLACES=178, PETRI_TRANSITIONS=301} [2024-06-27 21:24:05,288 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-27 21:24:05,288 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 301 transitions, 4002 flow [2024-06-27 21:24:05,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:05,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:05,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:05,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:24:05,289 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:05,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash 94654135, now seen corresponding path program 2 times [2024-06-27 21:24:05,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:05,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431284964] [2024-06-27 21:24:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:05,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:08,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:08,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431284964] [2024-06-27 21:24:08,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431284964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:08,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:08,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:08,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198113312] [2024-06-27 21:24:08,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:08,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:08,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:08,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:08,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:08,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:08,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 301 transitions, 4002 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:08,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:08,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:08,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:13,530 INFO L124 PetriNetUnfolderBase]: 10797/15061 cut-off events. [2024-06-27 21:24:13,530 INFO L125 PetriNetUnfolderBase]: For 556084/556165 co-relation queries the response was YES. [2024-06-27 21:24:13,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124295 conditions, 15061 events. 10797/15061 cut-off events. For 556084/556165 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 79999 event pairs, 3429 based on Foata normal form. 26/15059 useless extension candidates. Maximal degree in co-relation 124210. Up to 14163 conditions per place. [2024-06-27 21:24:13,813 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 276 selfloop transitions, 56 changer transitions 0/353 dead transitions. [2024-06-27 21:24:13,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 353 transitions, 5038 flow [2024-06-27 21:24:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 21:24:13,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44471153846153844 [2024-06-27 21:24:13,815 INFO L175 Difference]: Start difference. First operand has 178 places, 301 transitions, 4002 flow. Second operand 8 states and 185 transitions. [2024-06-27 21:24:13,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 353 transitions, 5038 flow [2024-06-27 21:24:14,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 353 transitions, 4905 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:14,751 INFO L231 Difference]: Finished difference. Result has 184 places, 308 transitions, 4225 flow [2024-06-27 21:24:14,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4225, PETRI_PLACES=184, PETRI_TRANSITIONS=308} [2024-06-27 21:24:14,752 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-27 21:24:14,752 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 308 transitions, 4225 flow [2024-06-27 21:24:14,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:14,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:14,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:14,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:24:14,752 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:14,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:14,765 INFO L85 PathProgramCache]: Analyzing trace with hash 94654259, now seen corresponding path program 1 times [2024-06-27 21:24:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:14,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420038453] [2024-06-27 21:24:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:14,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:17,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:17,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420038453] [2024-06-27 21:24:17,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420038453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:17,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:17,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:17,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809698657] [2024-06-27 21:24:17,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:17,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:17,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:17,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:24:17,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 308 transitions, 4225 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-27 21:24:17,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:17,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:24:17,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:22,377 INFO L124 PetriNetUnfolderBase]: 11489/15865 cut-off events. [2024-06-27 21:24:22,378 INFO L125 PetriNetUnfolderBase]: For 620732/620735 co-relation queries the response was YES. [2024-06-27 21:24:22,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132883 conditions, 15865 events. 11489/15865 cut-off events. For 620732/620735 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 84258 event pairs, 3529 based on Foata normal form. 8/15867 useless extension candidates. Maximal degree in co-relation 132795. Up to 15112 conditions per place. [2024-06-27 21:24:22,522 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 328 selfloop transitions, 68 changer transitions 0/401 dead transitions. [2024-06-27 21:24:22,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 401 transitions, 6201 flow [2024-06-27 21:24:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 21:24:22,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-27 21:24:22,523 INFO L175 Difference]: Start difference. First operand has 184 places, 308 transitions, 4225 flow. Second operand 8 states and 198 transitions. [2024-06-27 21:24:22,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 401 transitions, 6201 flow [2024-06-27 21:24:23,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 401 transitions, 5979 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:23,535 INFO L231 Difference]: Finished difference. Result has 190 places, 332 transitions, 4639 flow [2024-06-27 21:24:23,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=190, PETRI_TRANSITIONS=332} [2024-06-27 21:24:23,536 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-27 21:24:23,536 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 332 transitions, 4639 flow [2024-06-27 21:24:23,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-27 21:24:23,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:23,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:23,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:24:23,537 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:23,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:23,537 INFO L85 PathProgramCache]: Analyzing trace with hash 97455419, now seen corresponding path program 2 times [2024-06-27 21:24:23,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:23,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818610732] [2024-06-27 21:24:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:23,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818610732] [2024-06-27 21:24:27,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818610732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:27,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:27,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:27,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512464372] [2024-06-27 21:24:27,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:27,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:27,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:24:27,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 332 transitions, 4639 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-27 21:24:27,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:27,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:24:27,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:31,674 INFO L124 PetriNetUnfolderBase]: 11567/15964 cut-off events. [2024-06-27 21:24:31,675 INFO L125 PetriNetUnfolderBase]: For 643064/643064 co-relation queries the response was YES. [2024-06-27 21:24:31,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137701 conditions, 15964 events. 11567/15964 cut-off events. For 643064/643064 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 84320 event pairs, 3527 based on Foata normal form. 8/15968 useless extension candidates. Maximal degree in co-relation 137609. Up to 15640 conditions per place. [2024-06-27 21:24:31,852 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 349 selfloop transitions, 32 changer transitions 0/386 dead transitions. [2024-06-27 21:24:31,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 386 transitions, 5886 flow [2024-06-27 21:24:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 21:24:31,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:24:31,854 INFO L175 Difference]: Start difference. First operand has 190 places, 332 transitions, 4639 flow. Second operand 8 states and 182 transitions. [2024-06-27 21:24:31,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 386 transitions, 5886 flow [2024-06-27 21:24:32,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 386 transitions, 5702 flow, removed 80 selfloop flow, removed 2 redundant places. [2024-06-27 21:24:32,897 INFO L231 Difference]: Finished difference. Result has 196 places, 337 transitions, 4651 flow [2024-06-27 21:24:32,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4651, PETRI_PLACES=196, PETRI_TRANSITIONS=337} [2024-06-27 21:24:32,897 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-06-27 21:24:32,897 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 337 transitions, 4651 flow [2024-06-27 21:24:32,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-27 21:24:32,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:32,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:32,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:24:32,898 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:32,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1554748673, now seen corresponding path program 3 times [2024-06-27 21:24:32,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:32,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244792531] [2024-06-27 21:24:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:32,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat