./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 eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-eb4cb34-m [2024-06-21 17:45:02,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:45:02,828 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:45:02,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:45:02,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:45:02,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:45:02,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:45:02,856 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:45:02,857 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:45:02,860 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:45:02,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:45:02,860 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:45:02,861 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:45:02,862 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:45:02,862 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:45:02,862 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:45:02,862 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:45:02,863 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:45:02,863 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:45:02,863 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:45:02,863 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:45:02,864 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:45:02,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:45:02,864 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:45:02,864 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:45:02,864 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:45:02,865 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:45:02,865 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:45:02,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:45:02,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:45:02,866 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:45:02,867 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:45:02,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:45:02,867 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:45:02,867 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:45:02,867 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:45:02,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:45:02,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:45:02,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:45:02,868 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:45:02,868 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:45:02,868 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:45:02,869 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:45:02,869 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:45:03,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:45:03,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:45:03,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:45:03,047 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:45:03,048 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:45:03,048 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-21 17:45:04,041 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:45:04,238 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:45:04,239 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-21 17:45:04,255 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e669952/7a63cef9c1b04f6aaabdfcd758ee9c9c/FLAG209f2736b [2024-06-21 17:45:04,265 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e669952/7a63cef9c1b04f6aaabdfcd758ee9c9c [2024-06-21 17:45:04,267 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:45:04,267 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:45:04,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe019_power.opt.yml/witness.yml [2024-06-21 17:45:04,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:45:04,521 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:45:04,523 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:45:04,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:45:04,526 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:45:04,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:45:04" (1/2) ... [2024-06-21 17:45:04,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec99dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:45:04, skipping insertion in model container [2024-06-21 17:45:04,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:45:04" (1/2) ... [2024-06-21 17:45:04,529 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@58117540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:45:04, skipping insertion in model container [2024-06-21 17:45:04,530 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:45:04" (2/2) ... [2024-06-21 17:45:04,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec99dc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:04, skipping insertion in model container [2024-06-21 17:45:04,531 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:45:04" (2/2) ... [2024-06-21 17:45:04,531 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:45:04,685 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:45:04,687 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$r_buff1_thd0 == (_Bool)0) [2024-06-21 17:45:04,687 INFO L97 edCorrectnessWitness]: Location invariant before [L887-L887] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$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) [2024-06-21 17:45:04,687 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$r_buff1_thd0 == (_Bool)0) [2024-06-21 17:45:04,687 INFO L97 edCorrectnessWitness]: Location invariant before [L890-L890] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$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) [2024-06-21 17:45:04,688 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:45:04,688 INFO L106 edCorrectnessWitness]: ghost_update [L883-L883] multithreaded = 1; [2024-06-21 17:45:04,728 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:45:05,062 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:45:05,071 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:45:05,211 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:45:05,249 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:45:05,249 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05 WrapperNode [2024-06-21 17:45:05,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:45:05,250 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:45:05,250 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:45:05,250 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:45:05,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,292 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,325 INFO L138 Inliner]: procedures = 176, calls = 89, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 241 [2024-06-21 17:45:05,325 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:45:05,326 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:45:05,326 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:45:05,326 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:45:05,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,337 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,366 INFO L175 MemorySlicer]: Split 42 memory accesses to 2 slices as follows [2, 40]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-21 17:45:05,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,377 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:45:05,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:45:05,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:45:05,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:45:05,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (1/1) ... [2024-06-21 17:45:05,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:45:05,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:45:05,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:45:05,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:45:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:45:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:45:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:45:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:45:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:45:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:45:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:45:05,518 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:45:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:45:05,518 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:45:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:45:05,518 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:45:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 17:45:05,519 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 17:45:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:45:05,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:45:05,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:45:05,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:45:05,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:45:05,523 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:45:05,691 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:45:05,692 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:45:06,158 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:45:06,158 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:45:06,467 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:45:06,467 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:45:06,468 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:45:06 BoogieIcfgContainer [2024-06-21 17:45:06,468 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:45:06,469 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:45:06,469 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:45:06,471 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:45:06,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:45:04" (1/4) ... [2024-06-21 17:45:06,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23adcd4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:45:06, skipping insertion in model container [2024-06-21 17:45:06,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:45:04" (2/4) ... [2024-06-21 17:45:06,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23adcd4d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:45:06, skipping insertion in model container [2024-06-21 17:45:06,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:45:05" (3/4) ... [2024-06-21 17:45:06,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23adcd4d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:45:06, skipping insertion in model container [2024-06-21 17:45:06,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:45:06" (4/4) ... [2024-06-21 17:45:06,473 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2024-06-21 17:45:06,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:45:06,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 17:45:06,487 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:45:06,541 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:45:06,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:45:06,683 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 17:45:06,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:45:06,685 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. [2024-06-21 17:45:06,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:45:06,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 17:45:06,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:45:06,707 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;@4be0ec6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:45:06,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 17:45:06,713 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:45:06,713 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:45:06,713 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:45:06,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:06,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:45:06,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:06,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash 897874671, now seen corresponding path program 1 times [2024-06-21 17:45:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:06,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668360072] [2024-06-21 17:45:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668360072] [2024-06-21 17:45:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668360072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:08,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:08,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:45:08,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536317221] [2024-06-21 17:45:08,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:08,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:45:08,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:45:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:45:08,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:45:08,366 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) [2024-06-21 17:45:08,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:08,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:45:08,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:10,084 INFO L124 PetriNetUnfolderBase]: 6711/9234 cut-off events. [2024-06-21 17:45:10,084 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-06-21 17:45:10,097 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. [2024-06-21 17:45:10,132 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 48 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-21 17:45:10,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 247 flow [2024-06-21 17:45:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:45:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:45:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-21 17:45:10,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 17:45:10,143 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 90 transitions. [2024-06-21 17:45:10,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 247 flow [2024-06-21 17:45:10,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:45:10,152 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 17:45:10,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 17:45:10,157 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 17:45:10,157 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 17:45:10,157 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) [2024-06-21 17:45:10,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:10,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:10,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:45:10,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:10,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1487457511, now seen corresponding path program 1 times [2024-06-21 17:45:10,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:10,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605085136] [2024-06-21 17:45:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:10,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:12,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:12,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605085136] [2024-06-21 17:45:12,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605085136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:12,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:12,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:45:12,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599469072] [2024-06-21 17:45:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:12,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:45:12,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:45:12,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:45:12,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:12,819 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) [2024-06-21 17:45:12,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:12,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:12,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:15,320 INFO L124 PetriNetUnfolderBase]: 8525/11671 cut-off events. [2024-06-21 17:45:15,320 INFO L125 PetriNetUnfolderBase]: For 2111/2111 co-relation queries the response was YES. [2024-06-21 17:45:15,332 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. [2024-06-21 17:45:15,376 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 59 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-06-21 17:45:15,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 333 flow [2024-06-21 17:45:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:45:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:45:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-21 17:45:15,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336538461538461 [2024-06-21 17:45:15,380 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 111 transitions. [2024-06-21 17:45:15,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 333 flow [2024-06-21 17:45:15,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:45:15,385 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 166 flow [2024-06-21 17:45:15,385 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} [2024-06-21 17:45:15,386 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-06-21 17:45:15,386 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 166 flow [2024-06-21 17:45:15,396 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) [2024-06-21 17:45:15,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:15,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:15,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:45:15,397 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)] === [2024-06-21 17:45:15,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash -960974621, now seen corresponding path program 1 times [2024-06-21 17:45:15,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:15,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360370815] [2024-06-21 17:45:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:15,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:16,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:16,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360370815] [2024-06-21 17:45:16,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360370815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:16,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:16,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:45:16,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107790557] [2024-06-21 17:45:16,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:16,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:45:16,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:45:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:45:16,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:16,840 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) [2024-06-21 17:45:16,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:16,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:16,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:18,525 INFO L124 PetriNetUnfolderBase]: 6713/9255 cut-off events. [2024-06-21 17:45:18,525 INFO L125 PetriNetUnfolderBase]: For 4637/4637 co-relation queries the response was YES. [2024-06-21 17:45:18,539 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. [2024-06-21 17:45:18,569 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 63 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-21 17:45:18,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 406 flow [2024-06-21 17:45:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:45:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:45:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 17:45:18,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576923076923077 [2024-06-21 17:45:18,574 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 166 flow. Second operand 5 states and 119 transitions. [2024-06-21 17:45:18,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 406 flow [2024-06-21 17:45:18,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 382 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:45:18,578 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 232 flow [2024-06-21 17:45:18,578 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} [2024-06-21 17:45:18,580 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-06-21 17:45:18,580 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 232 flow [2024-06-21 17:45:18,580 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) [2024-06-21 17:45:18,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:18,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:18,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:45:18,581 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)] === [2024-06-21 17:45:18,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 274559189, now seen corresponding path program 1 times [2024-06-21 17:45:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:18,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154281913] [2024-06-21 17:45:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:18,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:20,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:20,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154281913] [2024-06-21 17:45:20,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154281913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:20,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:20,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:45:20,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635621793] [2024-06-21 17:45:20,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:20,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:45:20,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:45:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:45:20,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:20,444 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) [2024-06-21 17:45:20,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:20,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:20,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:22,161 INFO L124 PetriNetUnfolderBase]: 6704/9243 cut-off events. [2024-06-21 17:45:22,161 INFO L125 PetriNetUnfolderBase]: For 9305/9305 co-relation queries the response was YES. [2024-06-21 17:45:22,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26562 conditions, 9243 events. 6704/9243 cut-off events. For 9305/9305 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48039 event pairs, 3546 based on Foata normal form. 3/9241 useless extension candidates. Maximal degree in co-relation 26544. Up to 9161 conditions per place. [2024-06-21 17:45:22,206 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 75 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-21 17:45:22,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 95 transitions, 535 flow [2024-06-21 17:45:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:45:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:45:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 17:45:22,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 17:45:22,208 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 232 flow. Second operand 6 states and 141 transitions. [2024-06-21 17:45:22,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 95 transitions, 535 flow [2024-06-21 17:45:22,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 504 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 17:45:22,211 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 308 flow [2024-06-21 17:45:22,211 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-21 17:45:22,212 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2024-06-21 17:45:22,212 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 308 flow [2024-06-21 17:45:22,212 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) [2024-06-21 17:45:22,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:22,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:22,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:45:22,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:22,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash -78598334, now seen corresponding path program 1 times [2024-06-21 17:45:22,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:22,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054780834] [2024-06-21 17:45:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:22,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:24,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:24,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054780834] [2024-06-21 17:45:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054780834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:24,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:45:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507438216] [2024-06-21 17:45:24,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:24,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:45:24,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:24,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:45:24,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:45:24,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:24,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:24,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:24,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:24,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:26,810 INFO L124 PetriNetUnfolderBase]: 6916/9559 cut-off events. [2024-06-21 17:45:26,810 INFO L125 PetriNetUnfolderBase]: For 15536/15536 co-relation queries the response was YES. [2024-06-21 17:45:26,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30184 conditions, 9559 events. 6916/9559 cut-off events. For 15536/15536 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 50158 event pairs, 3427 based on Foata normal form. 39/9593 useless extension candidates. Maximal degree in co-relation 30163. Up to 9151 conditions per place. [2024-06-21 17:45:26,897 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 86 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-21 17:45:26,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 700 flow [2024-06-21 17:45:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:45:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:45:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 17:45:26,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-21 17:45:26,903 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 308 flow. Second operand 7 states and 173 transitions. [2024-06-21 17:45:26,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 700 flow [2024-06-21 17:45:26,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 677 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 17:45:26,911 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 428 flow [2024-06-21 17:45:26,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=428, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-21 17:45:26,913 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2024-06-21 17:45:26,913 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 428 flow [2024-06-21 17:45:26,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:26,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:26,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:26,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:45:26,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:26,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1680922618, now seen corresponding path program 1 times [2024-06-21 17:45:26,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:26,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561184565] [2024-06-21 17:45:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:26,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:29,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:29,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561184565] [2024-06-21 17:45:29,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561184565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:29,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:29,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:45:29,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446270674] [2024-06-21 17:45:29,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:29,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:45:29,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:45:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:45:29,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:45:29,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 428 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) [2024-06-21 17:45:29,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:29,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:45:29,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:31,195 INFO L124 PetriNetUnfolderBase]: 8704/11953 cut-off events. [2024-06-21 17:45:31,196 INFO L125 PetriNetUnfolderBase]: For 33098/33098 co-relation queries the response was YES. [2024-06-21 17:45:31,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41765 conditions, 11953 events. 8704/11953 cut-off events. For 33098/33098 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61258 event pairs, 3942 based on Foata normal form. 3/11945 useless extension candidates. Maximal degree in co-relation 41741. Up to 11774 conditions per place. [2024-06-21 17:45:31,264 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 74 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-21 17:45:31,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 710 flow [2024-06-21 17:45:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:45:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:45:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:45:31,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 17:45:31,267 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 428 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:45:31,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 710 flow [2024-06-21 17:45:31,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 671 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 17:45:31,307 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 492 flow [2024-06-21 17:45:31,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=68, 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=492, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 17:45:31,308 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 17:45:31,308 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 492 flow [2024-06-21 17:45:31,309 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) [2024-06-21 17:45:31,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:31,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:31,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:45:31,309 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:31,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash -818526892, now seen corresponding path program 1 times [2024-06-21 17:45:31,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:31,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976287599] [2024-06-21 17:45:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:31,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976287599] [2024-06-21 17:45:33,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976287599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:33,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:33,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:45:33,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821894971] [2024-06-21 17:45:33,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:33,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:45:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:45:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:45:33,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:45:33,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 492 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) [2024-06-21 17:45:33,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:33,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:45:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:36,134 INFO L124 PetriNetUnfolderBase]: 8731/12000 cut-off events. [2024-06-21 17:45:36,135 INFO L125 PetriNetUnfolderBase]: For 43216/43216 co-relation queries the response was YES. [2024-06-21 17:45:36,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44903 conditions, 12000 events. 8731/12000 cut-off events. For 43216/43216 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61537 event pairs, 3812 based on Foata normal form. 3/11992 useless extension candidates. Maximal degree in co-relation 44877. Up to 11725 conditions per place. [2024-06-21 17:45:36,194 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 76 selfloop transitions, 32 changer transitions 0/113 dead transitions. [2024-06-21 17:45:36,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 834 flow [2024-06-21 17:45:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:45:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:45:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 17:45:36,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-21 17:45:36,196 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 492 flow. Second operand 6 states and 142 transitions. [2024-06-21 17:45:36,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 834 flow [2024-06-21 17:45:36,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 791 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 17:45:36,234 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 586 flow [2024-06-21 17:45:36,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=586, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 17:45:36,235 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 17:45:36,235 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 586 flow [2024-06-21 17:45:36,236 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) [2024-06-21 17:45:36,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:36,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:36,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:45:36,236 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:36,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash -706952952, now seen corresponding path program 2 times [2024-06-21 17:45:36,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:36,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360358267] [2024-06-21 17:45:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:36,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360358267] [2024-06-21 17:45:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360358267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:38,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:45:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495263586] [2024-06-21 17:45:38,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:45:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:45:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:45:38,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:45:38,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 586 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) [2024-06-21 17:45:38,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:38,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:45:38,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:41,243 INFO L124 PetriNetUnfolderBase]: 8722/11995 cut-off events. [2024-06-21 17:45:41,245 INFO L125 PetriNetUnfolderBase]: For 57291/57300 co-relation queries the response was YES. [2024-06-21 17:45:41,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47925 conditions, 11995 events. 8722/11995 cut-off events. For 57291/57300 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61916 event pairs, 3799 based on Foata normal form. 9/11997 useless extension candidates. Maximal degree in co-relation 47898. Up to 11759 conditions per place. [2024-06-21 17:45:41,316 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 104 selfloop transitions, 26 changer transitions 0/135 dead transitions. [2024-06-21 17:45:41,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 135 transitions, 1024 flow [2024-06-21 17:45:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:45:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:45:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 17:45:41,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 17:45:41,319 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 586 flow. Second operand 8 states and 184 transitions. [2024-06-21 17:45:41,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 135 transitions, 1024 flow [2024-06-21 17:45:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 135 transitions, 939 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:45:41,416 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 624 flow [2024-06-21 17:45:41,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=624, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-21 17:45:41,418 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-21 17:45:41,418 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 624 flow [2024-06-21 17:45:41,418 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) [2024-06-21 17:45:41,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:41,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:41,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:45:41,419 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)] === [2024-06-21 17:45:41,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash -895259711, now seen corresponding path program 1 times [2024-06-21 17:45:41,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:41,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011141757] [2024-06-21 17:45:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:41,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:43,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011141757] [2024-06-21 17:45:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011141757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:43,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:43,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:45:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021535953] [2024-06-21 17:45:43,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:43,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:45:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:43,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:45:43,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:45:43,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:43,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 624 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) [2024-06-21 17:45:43,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:43,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:43,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:45,279 INFO L124 PetriNetUnfolderBase]: 6911/9554 cut-off events. [2024-06-21 17:45:45,280 INFO L125 PetriNetUnfolderBase]: For 49537/49537 co-relation queries the response was YES. [2024-06-21 17:45:45,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40017 conditions, 9554 events. 6911/9554 cut-off events. For 49537/49537 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 50097 event pairs, 3262 based on Foata normal form. 4/9549 useless extension candidates. Maximal degree in co-relation 39989. Up to 9455 conditions per place. [2024-06-21 17:45:45,330 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 87 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2024-06-21 17:45:45,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 106 transitions, 914 flow [2024-06-21 17:45:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:45:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:45:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-21 17:45:45,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 17:45:45,331 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 624 flow. Second operand 5 states and 115 transitions. [2024-06-21 17:45:45,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 106 transitions, 914 flow [2024-06-21 17:45:45,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 106 transitions, 813 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 17:45:45,350 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 605 flow [2024-06-21 17:45:45,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=523, 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=605, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-06-21 17:45:45,351 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-21 17:45:45,351 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 605 flow [2024-06-21 17:45:45,351 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) [2024-06-21 17:45:45,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:45,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:45,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:45:45,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:45,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1895230581, now seen corresponding path program 1 times [2024-06-21 17:45:45,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:45,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040585436] [2024-06-21 17:45:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:45,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:47,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:47,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040585436] [2024-06-21 17:45:47,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040585436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:47,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:47,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:45:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183128419] [2024-06-21 17:45:47,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:47,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:45:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:45:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:45:47,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:45:47,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 605 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) [2024-06-21 17:45:47,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:47,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:45:47,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:49,714 INFO L124 PetriNetUnfolderBase]: 8857/12197 cut-off events. [2024-06-21 17:45:49,715 INFO L125 PetriNetUnfolderBase]: For 74081/74081 co-relation queries the response was YES. [2024-06-21 17:45:49,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52260 conditions, 12197 events. 8857/12197 cut-off events. For 74081/74081 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 63031 event pairs, 2589 based on Foata normal form. 24/12210 useless extension candidates. Maximal degree in co-relation 52232. Up to 11848 conditions per place. [2024-06-21 17:45:49,789 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 107 selfloop transitions, 14 changer transitions 0/126 dead transitions. [2024-06-21 17:45:49,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 126 transitions, 983 flow [2024-06-21 17:45:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:45:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:45:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 17:45:49,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 17:45:49,791 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 605 flow. Second operand 6 states and 140 transitions. [2024-06-21 17:45:49,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 126 transitions, 983 flow [2024-06-21 17:45:49,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 126 transitions, 933 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:45:49,839 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 634 flow [2024-06-21 17:45:49,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=555, 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=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-21 17:45:49,840 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-21 17:45:49,840 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 634 flow [2024-06-21 17:45:49,840 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) [2024-06-21 17:45:49,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:49,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:49,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:45:49,841 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:49,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash 395466563, now seen corresponding path program 2 times [2024-06-21 17:45:49,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:49,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782156542] [2024-06-21 17:45:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:49,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:52,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782156542] [2024-06-21 17:45:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782156542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:52,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:52,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:45:52,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721275] [2024-06-21 17:45:52,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:52,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:45:52,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:52,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:45:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:45:52,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:45:52,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 634 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) [2024-06-21 17:45:52,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:52,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:45:52,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:54,471 INFO L124 PetriNetUnfolderBase]: 8842/12176 cut-off events. [2024-06-21 17:45:54,471 INFO L125 PetriNetUnfolderBase]: For 85692/85692 co-relation queries the response was YES. [2024-06-21 17:45:54,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53763 conditions, 12176 events. 8842/12176 cut-off events. For 85692/85692 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 62785 event pairs, 3634 based on Foata normal form. 6/12171 useless extension candidates. Maximal degree in co-relation 53734. Up to 11911 conditions per place. [2024-06-21 17:45:54,533 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 98 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-21 17:45:54,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 1032 flow [2024-06-21 17:45:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:45:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:45:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 17:45:54,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 17:45:54,535 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 634 flow. Second operand 6 states and 140 transitions. [2024-06-21 17:45:54,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 1032 flow [2024-06-21 17:45:54,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 993 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:45:54,577 INFO L231 Difference]: Finished difference. Result has 83 places, 94 transitions, 738 flow [2024-06-21 17:45:54,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=83, PETRI_TRANSITIONS=94} [2024-06-21 17:45:54,578 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-21 17:45:54,578 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 94 transitions, 738 flow [2024-06-21 17:45:54,578 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) [2024-06-21 17:45:54,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:54,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:54,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:45:54,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:54,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash 395471523, now seen corresponding path program 1 times [2024-06-21 17:45:54,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:54,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167645707] [2024-06-21 17:45:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:54,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:57,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:57,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167645707] [2024-06-21 17:45:57,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167645707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:57,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:57,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:45:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444853216] [2024-06-21 17:45:57,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:57,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:45:57,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:57,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:45:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:45:57,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:45:57,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 94 transitions, 738 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) [2024-06-21 17:45:57,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:57,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:45:57,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:00,037 INFO L124 PetriNetUnfolderBase]: 8998/12432 cut-off events. [2024-06-21 17:46:00,038 INFO L125 PetriNetUnfolderBase]: For 104510/104510 co-relation queries the response was YES. [2024-06-21 17:46:00,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57370 conditions, 12432 events. 8998/12432 cut-off events. For 104510/104510 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 64458 event pairs, 3289 based on Foata normal form. 24/12445 useless extension candidates. Maximal degree in co-relation 57340. Up to 11887 conditions per place. [2024-06-21 17:46:00,119 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 111 selfloop transitions, 30 changer transitions 0/146 dead transitions. [2024-06-21 17:46:00,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 146 transitions, 1224 flow [2024-06-21 17:46:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:46:00,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:46:00,121 INFO L175 Difference]: Start difference. First operand has 83 places, 94 transitions, 738 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:46:00,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 146 transitions, 1224 flow [2024-06-21 17:46:00,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 146 transitions, 1131 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 17:46:00,206 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 799 flow [2024-06-21 17:46:00,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=799, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-21 17:46:00,206 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 17:46:00,207 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 799 flow [2024-06-21 17:46:00,207 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) [2024-06-21 17:46:00,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:00,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:46:00,207 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:00,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1281214459, now seen corresponding path program 2 times [2024-06-21 17:46:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:00,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445568513] [2024-06-21 17:46:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:02,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:02,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445568513] [2024-06-21 17:46:02,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445568513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:02,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:02,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:46:02,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240382562] [2024-06-21 17:46:02,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:02,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:46:02,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:02,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:46:02,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:46:02,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:46:02,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 799 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) [2024-06-21 17:46:02,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:02,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:46:02,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:05,556 INFO L124 PetriNetUnfolderBase]: 9373/13005 cut-off events. [2024-06-21 17:46:05,556 INFO L125 PetriNetUnfolderBase]: For 125515/125515 co-relation queries the response was YES. [2024-06-21 17:46:05,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62339 conditions, 13005 events. 9373/13005 cut-off events. For 125515/125515 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 68446 event pairs, 3363 based on Foata normal form. 18/13012 useless extension candidates. Maximal degree in co-relation 62308. Up to 11821 conditions per place. [2024-06-21 17:46:05,638 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 116 selfloop transitions, 46 changer transitions 0/167 dead transitions. [2024-06-21 17:46:05,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 167 transitions, 1501 flow [2024-06-21 17:46:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 17:46:05,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-21 17:46:05,640 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 799 flow. Second operand 8 states and 194 transitions. [2024-06-21 17:46:05,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 167 transitions, 1501 flow [2024-06-21 17:46:05,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1425 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:46:05,741 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 978 flow [2024-06-21 17:46:05,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2024-06-21 17:46:05,742 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-21 17:46:05,742 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 978 flow [2024-06-21 17:46:05,742 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) [2024-06-21 17:46:05,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:05,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:05,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:46:05,743 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:05,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1281207949, now seen corresponding path program 3 times [2024-06-21 17:46:05,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:05,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251679785] [2024-06-21 17:46:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:05,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:08,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251679785] [2024-06-21 17:46:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251679785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:08,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:46:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366830538] [2024-06-21 17:46:08,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:08,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:46:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:46:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:46:08,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:46:08,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 978 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) [2024-06-21 17:46:08,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:08,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:46:08,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:11,110 INFO L124 PetriNetUnfolderBase]: 9319/12927 cut-off events. [2024-06-21 17:46:11,110 INFO L125 PetriNetUnfolderBase]: For 143303/143303 co-relation queries the response was YES. [2024-06-21 17:46:11,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63559 conditions, 12927 events. 9319/12927 cut-off events. For 143303/143303 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67820 event pairs, 3705 based on Foata normal form. 24/12940 useless extension candidates. Maximal degree in co-relation 63526. Up to 12421 conditions per place. [2024-06-21 17:46:11,191 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 117 selfloop transitions, 38 changer transitions 0/160 dead transitions. [2024-06-21 17:46:11,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 160 transitions, 1440 flow [2024-06-21 17:46:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 17:46:11,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 17:46:11,193 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 978 flow. Second operand 8 states and 188 transitions. [2024-06-21 17:46:11,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 160 transitions, 1440 flow [2024-06-21 17:46:11,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 160 transitions, 1359 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 17:46:11,370 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 983 flow [2024-06-21 17:46:11,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=983, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-21 17:46:11,370 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-21 17:46:11,371 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 983 flow [2024-06-21 17:46:11,371 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) [2024-06-21 17:46:11,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:11,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:11,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:46:11,371 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:11,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:11,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1983244602, now seen corresponding path program 1 times [2024-06-21 17:46:11,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:11,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224595718] [2024-06-21 17:46:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:11,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:13,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224595718] [2024-06-21 17:46:13,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224595718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:13,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:13,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:46:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715597389] [2024-06-21 17:46:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:46:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:46:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:46:13,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:46:13,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 983 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) [2024-06-21 17:46:13,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:13,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:46:13,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:16,326 INFO L124 PetriNetUnfolderBase]: 9345/12965 cut-off events. [2024-06-21 17:46:16,326 INFO L125 PetriNetUnfolderBase]: For 144534/144534 co-relation queries the response was YES. [2024-06-21 17:46:16,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64241 conditions, 12965 events. 9345/12965 cut-off events. For 144534/144534 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67997 event pairs, 3673 based on Foata normal form. 8/12969 useless extension candidates. Maximal degree in co-relation 64206. Up to 12789 conditions per place. [2024-06-21 17:46:16,400 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 129 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-21 17:46:16,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 154 transitions, 1553 flow [2024-06-21 17:46:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:46:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:46:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 17:46:16,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 17:46:16,405 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 983 flow. Second operand 6 states and 138 transitions. [2024-06-21 17:46:16,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 154 transitions, 1553 flow [2024-06-21 17:46:16,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1467 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:16,522 INFO L231 Difference]: Finished difference. Result has 96 places, 122 transitions, 1120 flow [2024-06-21 17:46:16,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1120, PETRI_PLACES=96, PETRI_TRANSITIONS=122} [2024-06-21 17:46:16,523 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-21 17:46:16,523 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 122 transitions, 1120 flow [2024-06-21 17:46:16,523 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) [2024-06-21 17:46:16,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:16,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:46:16,523 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:16,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:16,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1343214399, now seen corresponding path program 1 times [2024-06-21 17:46:16,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:16,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310411917] [2024-06-21 17:46:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:16,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:19,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:19,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310411917] [2024-06-21 17:46:19,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310411917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:19,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:19,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:46:19,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696539070] [2024-06-21 17:46:19,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:19,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:46:19,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:46:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:46:19,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:46:19,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 122 transitions, 1120 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) [2024-06-21 17:46:19,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:19,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:46:19,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:22,104 INFO L124 PetriNetUnfolderBase]: 9306/12904 cut-off events. [2024-06-21 17:46:22,104 INFO L125 PetriNetUnfolderBase]: For 163556/163556 co-relation queries the response was YES. [2024-06-21 17:46:22,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67594 conditions, 12904 events. 9306/12904 cut-off events. For 163556/163556 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 67435 event pairs, 3642 based on Foata normal form. 18/12911 useless extension candidates. Maximal degree in co-relation 67556. Up to 12331 conditions per place. [2024-06-21 17:46:22,205 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 133 selfloop transitions, 31 changer transitions 0/169 dead transitions. [2024-06-21 17:46:22,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 169 transitions, 1599 flow [2024-06-21 17:46:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 17:46:22,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44505494505494503 [2024-06-21 17:46:22,207 INFO L175 Difference]: Start difference. First operand has 96 places, 122 transitions, 1120 flow. Second operand 7 states and 162 transitions. [2024-06-21 17:46:22,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 169 transitions, 1599 flow [2024-06-21 17:46:22,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 169 transitions, 1565 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-21 17:46:22,416 INFO L231 Difference]: Finished difference. Result has 101 places, 123 transitions, 1191 flow [2024-06-21 17:46:22,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=101, PETRI_TRANSITIONS=123} [2024-06-21 17:46:22,416 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-21 17:46:22,416 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 123 transitions, 1191 flow [2024-06-21 17:46:22,416 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) [2024-06-21 17:46:22,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:22,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:22,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:46:22,417 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:22,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1355806368, now seen corresponding path program 1 times [2024-06-21 17:46:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955506493] [2024-06-21 17:46:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:24,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:24,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955506493] [2024-06-21 17:46:24,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955506493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:24,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:24,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:46:24,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187759247] [2024-06-21 17:46:24,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:24,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:46:24,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:46:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:46:24,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:24,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 123 transitions, 1191 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) [2024-06-21 17:46:24,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:24,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:24,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:27,073 INFO L124 PetriNetUnfolderBase]: 8897/12498 cut-off events. [2024-06-21 17:46:27,073 INFO L125 PetriNetUnfolderBase]: For 186360/186360 co-relation queries the response was YES. [2024-06-21 17:46:27,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68100 conditions, 12498 events. 8897/12498 cut-off events. For 186360/186360 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 66557 event pairs, 3615 based on Foata normal form. 6/12497 useless extension candidates. Maximal degree in co-relation 68059. Up to 12172 conditions per place. [2024-06-21 17:46:27,171 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 126 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-06-21 17:46:27,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 155 transitions, 1617 flow [2024-06-21 17:46:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:46:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:46:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 17:46:27,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-06-21 17:46:27,173 INFO L175 Difference]: Start difference. First operand has 101 places, 123 transitions, 1191 flow. Second operand 6 states and 137 transitions. [2024-06-21 17:46:27,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 155 transitions, 1617 flow [2024-06-21 17:46:27,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 155 transitions, 1486 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:27,367 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1189 flow [2024-06-21 17:46:27,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1189, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-06-21 17:46:27,368 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-21 17:46:27,368 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1189 flow [2024-06-21 17:46:27,368 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) [2024-06-21 17:46:27,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:27,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:27,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:46:27,369 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)] === [2024-06-21 17:46:27,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1351044768, now seen corresponding path program 2 times [2024-06-21 17:46:27,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:27,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570236371] [2024-06-21 17:46:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:27,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:29,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:29,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570236371] [2024-06-21 17:46:29,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570236371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:29,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:29,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:46:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449452656] [2024-06-21 17:46:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:29,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:46:29,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:46:29,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:46:29,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:29,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1189 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) [2024-06-21 17:46:29,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:29,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:29,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:32,329 INFO L124 PetriNetUnfolderBase]: 9048/12690 cut-off events. [2024-06-21 17:46:32,330 INFO L125 PetriNetUnfolderBase]: For 205839/205839 co-relation queries the response was YES. [2024-06-21 17:46:32,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71783 conditions, 12690 events. 9048/12690 cut-off events. For 205839/205839 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 67610 event pairs, 3630 based on Foata normal form. 6/12685 useless extension candidates. Maximal degree in co-relation 71742. Up to 12280 conditions per place. [2024-06-21 17:46:32,435 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 135 selfloop transitions, 28 changer transitions 0/172 dead transitions. [2024-06-21 17:46:32,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 172 transitions, 1827 flow [2024-06-21 17:46:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 17:46:32,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368131868131868 [2024-06-21 17:46:32,437 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1189 flow. Second operand 7 states and 159 transitions. [2024-06-21 17:46:32,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 172 transitions, 1827 flow [2024-06-21 17:46:32,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 172 transitions, 1736 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:46:32,643 INFO L231 Difference]: Finished difference. Result has 105 places, 139 transitions, 1338 flow [2024-06-21 17:46:32,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1338, PETRI_PLACES=105, PETRI_TRANSITIONS=139} [2024-06-21 17:46:32,643 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-21 17:46:32,643 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 139 transitions, 1338 flow [2024-06-21 17:46:32,644 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) [2024-06-21 17:46:32,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:32,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:32,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:46:32,644 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)] === [2024-06-21 17:46:32,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1667859813, now seen corresponding path program 1 times [2024-06-21 17:46:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:32,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122073632] [2024-06-21 17:46:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:32,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:34,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122073632] [2024-06-21 17:46:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122073632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:34,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:46:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100673695] [2024-06-21 17:46:34,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:34,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:46:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:34,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:46:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:46:34,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:46:34,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 139 transitions, 1338 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) [2024-06-21 17:46:34,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:34,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:46:34,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:38,245 INFO L124 PetriNetUnfolderBase]: 9855/13638 cut-off events. [2024-06-21 17:46:38,246 INFO L125 PetriNetUnfolderBase]: For 233123/233123 co-relation queries the response was YES. [2024-06-21 17:46:38,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80672 conditions, 13638 events. 9855/13638 cut-off events. For 233123/233123 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 71765 event pairs, 3611 based on Foata normal form. 16/13643 useless extension candidates. Maximal degree in co-relation 80629. Up to 13126 conditions per place. [2024-06-21 17:46:38,361 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 141 selfloop transitions, 45 changer transitions 0/191 dead transitions. [2024-06-21 17:46:38,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 191 transitions, 2104 flow [2024-06-21 17:46:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 17:46:38,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41586538461538464 [2024-06-21 17:46:38,363 INFO L175 Difference]: Start difference. First operand has 105 places, 139 transitions, 1338 flow. Second operand 8 states and 173 transitions. [2024-06-21 17:46:38,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 191 transitions, 2104 flow [2024-06-21 17:46:38,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 191 transitions, 2021 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 17:46:38,629 INFO L231 Difference]: Finished difference. Result has 112 places, 155 transitions, 1596 flow [2024-06-21 17:46:38,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1596, PETRI_PLACES=112, PETRI_TRANSITIONS=155} [2024-06-21 17:46:38,630 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-21 17:46:38,630 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 155 transitions, 1596 flow [2024-06-21 17:46:38,630 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) [2024-06-21 17:46:38,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:38,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:38,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:46:38,631 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)] === [2024-06-21 17:46:38,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1067489253, now seen corresponding path program 2 times [2024-06-21 17:46:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:38,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602237262] [2024-06-21 17:46:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:41,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:41,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602237262] [2024-06-21 17:46:41,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602237262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:41,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:41,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:46:41,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045629739] [2024-06-21 17:46:41,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:41,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:46:41,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:41,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:46:41,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:46:41,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:46:41,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 155 transitions, 1596 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) [2024-06-21 17:46:41,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:41,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:46:41,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:44,492 INFO L124 PetriNetUnfolderBase]: 9995/13836 cut-off events. [2024-06-21 17:46:44,492 INFO L125 PetriNetUnfolderBase]: For 264751/264751 co-relation queries the response was YES. [2024-06-21 17:46:44,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86230 conditions, 13836 events. 9995/13836 cut-off events. For 264751/264751 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 72956 event pairs, 3623 based on Foata normal form. 16/13841 useless extension candidates. Maximal degree in co-relation 86183. Up to 12994 conditions per place. [2024-06-21 17:46:44,604 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 152 selfloop transitions, 58 changer transitions 0/215 dead transitions. [2024-06-21 17:46:44,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 215 transitions, 2532 flow [2024-06-21 17:46:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 17:46:44,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-21 17:46:44,607 INFO L175 Difference]: Start difference. First operand has 112 places, 155 transitions, 1596 flow. Second operand 7 states and 166 transitions. [2024-06-21 17:46:44,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 215 transitions, 2532 flow [2024-06-21 17:46:44,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 215 transitions, 2447 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 17:46:44,885 INFO L231 Difference]: Finished difference. Result has 118 places, 173 transitions, 1950 flow [2024-06-21 17:46:44,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1950, PETRI_PLACES=118, PETRI_TRANSITIONS=173} [2024-06-21 17:46:44,893 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-21 17:46:44,893 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 173 transitions, 1950 flow [2024-06-21 17:46:44,893 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) [2024-06-21 17:46:44,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:44,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:44,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:46:44,894 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:44,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1381669844, now seen corresponding path program 1 times [2024-06-21 17:46:44,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:44,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354890785] [2024-06-21 17:46:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:44,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:47,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:47,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354890785] [2024-06-21 17:46:47,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354890785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:47,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:47,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:46:47,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309608358] [2024-06-21 17:46:47,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:47,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:46:47,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:46:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:46:47,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:47,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 173 transitions, 1950 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) [2024-06-21 17:46:47,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:47,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:47,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:50,449 INFO L124 PetriNetUnfolderBase]: 9586/13410 cut-off events. [2024-06-21 17:46:50,449 INFO L125 PetriNetUnfolderBase]: For 299208/299350 co-relation queries the response was YES. [2024-06-21 17:46:50,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89837 conditions, 13410 events. 9586/13410 cut-off events. For 299208/299350 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 71154 event pairs, 3694 based on Foata normal form. 20/13372 useless extension candidates. Maximal degree in co-relation 89786. Up to 12989 conditions per place. [2024-06-21 17:46:50,557 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 184 selfloop transitions, 32 changer transitions 0/227 dead transitions. [2024-06-21 17:46:50,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 227 transitions, 2780 flow [2024-06-21 17:46:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 17:46:50,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-21 17:46:50,559 INFO L175 Difference]: Start difference. First operand has 118 places, 173 transitions, 1950 flow. Second operand 7 states and 163 transitions. [2024-06-21 17:46:50,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 227 transitions, 2780 flow [2024-06-21 17:46:50,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 227 transitions, 2684 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-21 17:46:50,912 INFO L231 Difference]: Finished difference. Result has 126 places, 189 transitions, 2196 flow [2024-06-21 17:46:50,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2196, PETRI_PLACES=126, PETRI_TRANSITIONS=189} [2024-06-21 17:46:50,913 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 17:46:50,913 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 189 transitions, 2196 flow [2024-06-21 17:46:50,913 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) [2024-06-21 17:46:50,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:50,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:50,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:46:50,914 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:50,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1382329834, now seen corresponding path program 2 times [2024-06-21 17:46:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:50,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946837214] [2024-06-21 17:46:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:53,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946837214] [2024-06-21 17:46:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946837214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:53,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:53,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:46:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826607431] [2024-06-21 17:46:53,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:46:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:46:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:46:53,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:53,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 189 transitions, 2196 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) [2024-06-21 17:46:53,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:53,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:53,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:56,990 INFO L124 PetriNetUnfolderBase]: 9598/13422 cut-off events. [2024-06-21 17:46:56,990 INFO L125 PetriNetUnfolderBase]: For 304394/304521 co-relation queries the response was YES. [2024-06-21 17:46:57,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89258 conditions, 13422 events. 9598/13422 cut-off events. For 304394/304521 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 71199 event pairs, 3684 based on Foata normal form. 12/13378 useless extension candidates. Maximal degree in co-relation 89202. Up to 13043 conditions per place. [2024-06-21 17:46:57,118 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 190 selfloop transitions, 25 changer transitions 0/226 dead transitions. [2024-06-21 17:46:57,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 226 transitions, 2802 flow [2024-06-21 17:46:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 17:46:57,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43131868131868134 [2024-06-21 17:46:57,120 INFO L175 Difference]: Start difference. First operand has 126 places, 189 transitions, 2196 flow. Second operand 7 states and 157 transitions. [2024-06-21 17:46:57,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 226 transitions, 2802 flow [2024-06-21 17:46:57,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 226 transitions, 2704 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-06-21 17:46:57,624 INFO L231 Difference]: Finished difference. Result has 132 places, 194 transitions, 2266 flow [2024-06-21 17:46:57,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2266, PETRI_PLACES=132, PETRI_TRANSITIONS=194} [2024-06-21 17:46:57,625 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-21 17:46:57,625 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 194 transitions, 2266 flow [2024-06-21 17:46:57,625 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) [2024-06-21 17:46:57,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:57,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:57,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:46:57,625 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:57,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1381665969, now seen corresponding path program 1 times [2024-06-21 17:46:57,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:57,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356352137] [2024-06-21 17:46:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:57,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:00,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:00,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356352137] [2024-06-21 17:47:00,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356352137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:00,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:00,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:00,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624975584] [2024-06-21 17:47:00,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:00,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:00,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:00,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:00,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:00,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:47:00,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 194 transitions, 2266 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) [2024-06-21 17:47:00,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:00,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:47:00,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:03,213 INFO L124 PetriNetUnfolderBase]: 10245/14161 cut-off events. [2024-06-21 17:47:03,213 INFO L125 PetriNetUnfolderBase]: For 336623/336623 co-relation queries the response was YES. [2024-06-21 17:47:03,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95028 conditions, 14161 events. 10245/14161 cut-off events. For 336623/336623 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 74295 event pairs, 3688 based on Foata normal form. 8/14165 useless extension candidates. Maximal degree in co-relation 94969. Up to 13925 conditions per place. [2024-06-21 17:47:03,336 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 227 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2024-06-21 17:47:03,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 259 transitions, 3322 flow [2024-06-21 17:47:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 17:47:03,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 17:47:03,338 INFO L175 Difference]: Start difference. First operand has 132 places, 194 transitions, 2266 flow. Second operand 7 states and 161 transitions. [2024-06-21 17:47:03,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 259 transitions, 3322 flow [2024-06-21 17:47:03,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 259 transitions, 3171 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 17:47:03,833 INFO L231 Difference]: Finished difference. Result has 137 places, 216 transitions, 2517 flow [2024-06-21 17:47:03,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2517, PETRI_PLACES=137, PETRI_TRANSITIONS=216} [2024-06-21 17:47:03,834 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-21 17:47:03,834 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 216 transitions, 2517 flow [2024-06-21 17:47:03,834 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) [2024-06-21 17:47:03,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:03,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:03,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:47:03,835 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)] === [2024-06-21 17:47:03,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1921612567, now seen corresponding path program 2 times [2024-06-21 17:47:03,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:03,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901213008] [2024-06-21 17:47:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:06,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901213008] [2024-06-21 17:47:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901213008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:06,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:06,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727896226] [2024-06-21 17:47:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:06,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:06,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:47:06,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 216 transitions, 2517 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) [2024-06-21 17:47:06,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:06,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:47:06,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:09,551 INFO L124 PetriNetUnfolderBase]: 10297/14218 cut-off events. [2024-06-21 17:47:09,551 INFO L125 PetriNetUnfolderBase]: For 369578/369578 co-relation queries the response was YES. [2024-06-21 17:47:09,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99694 conditions, 14218 events. 10297/14218 cut-off events. For 369578/369578 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 74299 event pairs, 3633 based on Foata normal form. 8/14222 useless extension candidates. Maximal degree in co-relation 99631. Up to 14040 conditions per place. [2024-06-21 17:47:09,673 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 233 selfloop transitions, 27 changer transitions 0/265 dead transitions. [2024-06-21 17:47:09,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 265 transitions, 3412 flow [2024-06-21 17:47:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 17:47:09,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42032967032967034 [2024-06-21 17:47:09,675 INFO L175 Difference]: Start difference. First operand has 137 places, 216 transitions, 2517 flow. Second operand 7 states and 153 transitions. [2024-06-21 17:47:09,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 265 transitions, 3412 flow [2024-06-21 17:47:10,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 265 transitions, 3318 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-21 17:47:10,160 INFO L231 Difference]: Finished difference. Result has 145 places, 231 transitions, 2711 flow [2024-06-21 17:47:10,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2711, PETRI_PLACES=145, PETRI_TRANSITIONS=231} [2024-06-21 17:47:10,161 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-21 17:47:10,161 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 231 transitions, 2711 flow [2024-06-21 17:47:10,161 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) [2024-06-21 17:47:10,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:10,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:10,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:47:10,162 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:10,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1378610764, now seen corresponding path program 3 times [2024-06-21 17:47:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:10,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436180831] [2024-06-21 17:47:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:12,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:12,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436180831] [2024-06-21 17:47:12,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436180831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:12,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:12,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:12,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533351347] [2024-06-21 17:47:12,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:12,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:12,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:12,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:12,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 231 transitions, 2711 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) [2024-06-21 17:47:12,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:12,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:12,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:16,047 INFO L124 PetriNetUnfolderBase]: 9939/13849 cut-off events. [2024-06-21 17:47:16,047 INFO L125 PetriNetUnfolderBase]: For 397595/397645 co-relation queries the response was YES. [2024-06-21 17:47:16,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102876 conditions, 13849 events. 9939/13849 cut-off events. For 397595/397645 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 72825 event pairs, 3661 based on Foata normal form. 6/13834 useless extension candidates. Maximal degree in co-relation 102808. Up to 13291 conditions per place. [2024-06-21 17:47:16,493 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 213 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-21 17:47:16,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 267 transitions, 3404 flow [2024-06-21 17:47:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 17:47:16,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-21 17:47:16,495 INFO L175 Difference]: Start difference. First operand has 145 places, 231 transitions, 2711 flow. Second operand 7 states and 154 transitions. [2024-06-21 17:47:16,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 267 transitions, 3404 flow [2024-06-21 17:47:17,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 267 transitions, 3252 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-21 17:47:17,018 INFO L231 Difference]: Finished difference. Result has 150 places, 239 transitions, 2799 flow [2024-06-21 17:47:17,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2799, PETRI_PLACES=150, PETRI_TRANSITIONS=239} [2024-06-21 17:47:17,022 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 95 predicate places. [2024-06-21 17:47:17,023 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 239 transitions, 2799 flow [2024-06-21 17:47:17,023 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) [2024-06-21 17:47:17,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:17,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:17,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:47:17,023 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:17,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:17,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1067287815, now seen corresponding path program 3 times [2024-06-21 17:47:17,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:17,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734561208] [2024-06-21 17:47:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:17,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:19,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:19,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734561208] [2024-06-21 17:47:19,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734561208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:19,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:19,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414148654] [2024-06-21 17:47:19,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:19,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:19,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:19,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:47:19,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 239 transitions, 2799 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) [2024-06-21 17:47:19,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:19,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:47:19,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:23,062 INFO L124 PetriNetUnfolderBase]: 10417/14380 cut-off events. [2024-06-21 17:47:23,062 INFO L125 PetriNetUnfolderBase]: For 427630/427630 co-relation queries the response was YES. [2024-06-21 17:47:23,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108636 conditions, 14380 events. 10417/14380 cut-off events. For 427630/427630 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 75158 event pairs, 3666 based on Foata normal form. 8/14384 useless extension candidates. Maximal degree in co-relation 108566. Up to 14090 conditions per place. [2024-06-21 17:47:23,194 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 251 selfloop transitions, 39 changer transitions 0/295 dead transitions. [2024-06-21 17:47:23,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 295 transitions, 3938 flow [2024-06-21 17:47:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 17:47:23,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43131868131868134 [2024-06-21 17:47:23,196 INFO L175 Difference]: Start difference. First operand has 150 places, 239 transitions, 2799 flow. Second operand 7 states and 157 transitions. [2024-06-21 17:47:23,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 295 transitions, 3938 flow [2024-06-21 17:47:23,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 295 transitions, 3783 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 17:47:23,630 INFO L231 Difference]: Finished difference. Result has 154 places, 255 transitions, 3029 flow [2024-06-21 17:47:23,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3029, PETRI_PLACES=154, PETRI_TRANSITIONS=255} [2024-06-21 17:47:23,630 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-21 17:47:23,630 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 255 transitions, 3029 flow [2024-06-21 17:47:23,631 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) [2024-06-21 17:47:23,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:23,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:47:23,631 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)] === [2024-06-21 17:47:23,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1067503141, now seen corresponding path program 1 times [2024-06-21 17:47:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:23,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809017971] [2024-06-21 17:47:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:23,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:27,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809017971] [2024-06-21 17:47:27,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809017971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:27,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:27,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:27,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500573368] [2024-06-21 17:47:27,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:27,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:27,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:27,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:47:27,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 255 transitions, 3029 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) [2024-06-21 17:47:27,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:27,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:47:27,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:31,094 INFO L124 PetriNetUnfolderBase]: 10501/14499 cut-off events. [2024-06-21 17:47:31,094 INFO L125 PetriNetUnfolderBase]: For 464342/464342 co-relation queries the response was YES. [2024-06-21 17:47:31,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112906 conditions, 14499 events. 10501/14499 cut-off events. For 464342/464342 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 76163 event pairs, 3626 based on Foata normal form. 16/14511 useless extension candidates. Maximal degree in co-relation 112834. Up to 14197 conditions per place. [2024-06-21 17:47:31,240 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 261 selfloop transitions, 34 changer transitions 0/300 dead transitions. [2024-06-21 17:47:31,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 300 transitions, 3976 flow [2024-06-21 17:47:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 17:47:31,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-21 17:47:31,242 INFO L175 Difference]: Start difference. First operand has 154 places, 255 transitions, 3029 flow. Second operand 7 states and 160 transitions. [2024-06-21 17:47:31,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 300 transitions, 3976 flow [2024-06-21 17:47:31,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 300 transitions, 3824 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-06-21 17:47:31,726 INFO L231 Difference]: Finished difference. Result has 159 places, 258 transitions, 3034 flow [2024-06-21 17:47:31,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3034, PETRI_PLACES=159, PETRI_TRANSITIONS=258} [2024-06-21 17:47:31,726 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-21 17:47:31,727 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 258 transitions, 3034 flow [2024-06-21 17:47:31,727 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) [2024-06-21 17:47:31,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:31,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:31,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:47:31,727 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)] === [2024-06-21 17:47:31,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:31,728 INFO L85 PathProgramCache]: Analyzing trace with hash 117907545, now seen corresponding path program 1 times [2024-06-21 17:47:31,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:31,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227823479] [2024-06-21 17:47:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:31,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:34,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:34,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227823479] [2024-06-21 17:47:34,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227823479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:34,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:34,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:34,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396479929] [2024-06-21 17:47:34,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:34,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:34,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:34,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:34,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 258 transitions, 3034 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) [2024-06-21 17:47:34,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:34,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:34,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:38,209 INFO L124 PetriNetUnfolderBase]: 10234/14272 cut-off events. [2024-06-21 17:47:38,209 INFO L125 PetriNetUnfolderBase]: For 500631/500705 co-relation queries the response was YES. [2024-06-21 17:47:38,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113673 conditions, 14272 events. 10234/14272 cut-off events. For 500631/500705 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 75231 event pairs, 3388 based on Foata normal form. 24/14277 useless extension candidates. Maximal degree in co-relation 113598. Up to 13425 conditions per place. [2024-06-21 17:47:38,366 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 248 selfloop transitions, 44 changer transitions 0/313 dead transitions. [2024-06-21 17:47:38,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 313 transitions, 4020 flow [2024-06-21 17:47:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 17:47:38,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495192307692308 [2024-06-21 17:47:38,367 INFO L175 Difference]: Start difference. First operand has 159 places, 258 transitions, 3034 flow. Second operand 8 states and 187 transitions. [2024-06-21 17:47:38,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 313 transitions, 4020 flow [2024-06-21 17:47:38,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 313 transitions, 3903 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:47:38,829 INFO L231 Difference]: Finished difference. Result has 162 places, 264 transitions, 3195 flow [2024-06-21 17:47:38,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2917, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3195, PETRI_PLACES=162, PETRI_TRANSITIONS=264} [2024-06-21 17:47:38,829 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-21 17:47:38,829 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 264 transitions, 3195 flow [2024-06-21 17:47:38,830 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) [2024-06-21 17:47:38,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:38,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:47:38,830 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:38,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1557545183, now seen corresponding path program 2 times [2024-06-21 17:47:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:38,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235735609] [2024-06-21 17:47:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:38,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:41,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:41,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235735609] [2024-06-21 17:47:41,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235735609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:41,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:41,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493267095] [2024-06-21 17:47:41,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:41,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:41,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:41,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:41,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:41,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:41,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 264 transitions, 3195 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) [2024-06-21 17:47:41,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:41,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:41,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:45,479 INFO L124 PetriNetUnfolderBase]: 10288/14343 cut-off events. [2024-06-21 17:47:45,479 INFO L125 PetriNetUnfolderBase]: For 537400/537508 co-relation queries the response was YES. [2024-06-21 17:47:45,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116589 conditions, 14343 events. 10288/14343 cut-off events. For 537400/537508 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 75711 event pairs, 3634 based on Foata normal form. 24/14344 useless extension candidates. Maximal degree in co-relation 116513. Up to 13659 conditions per place. [2024-06-21 17:47:45,624 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 249 selfloop transitions, 39 changer transitions 0/309 dead transitions. [2024-06-21 17:47:45,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 309 transitions, 3967 flow [2024-06-21 17:47:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 17:47:45,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-21 17:47:45,626 INFO L175 Difference]: Start difference. First operand has 162 places, 264 transitions, 3195 flow. Second operand 8 states and 180 transitions. [2024-06-21 17:47:45,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 309 transitions, 3967 flow [2024-06-21 17:47:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 309 transitions, 3805 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 17:47:46,271 INFO L231 Difference]: Finished difference. Result has 166 places, 267 transitions, 3219 flow [2024-06-21 17:47:46,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3219, PETRI_PLACES=166, PETRI_TRANSITIONS=267} [2024-06-21 17:47:46,274 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-21 17:47:46,274 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 267 transitions, 3219 flow [2024-06-21 17:47:46,274 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) [2024-06-21 17:47:46,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:46,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:46,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:47:46,274 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)] === [2024-06-21 17:47:46,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash 94654259, now seen corresponding path program 1 times [2024-06-21 17:47:46,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:46,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099378128] [2024-06-21 17:47:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:46,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:48,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:48,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099378128] [2024-06-21 17:47:48,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099378128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:48,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:48,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:48,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807537409] [2024-06-21 17:47:48,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:48,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:48,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:48,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:48,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:48,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:47:49,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 267 transitions, 3219 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) [2024-06-21 17:47:49,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:49,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:47:49,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:52,991 INFO L124 PetriNetUnfolderBase]: 11012/15169 cut-off events. [2024-06-21 17:47:52,992 INFO L125 PetriNetUnfolderBase]: For 574478/574481 co-relation queries the response was YES. [2024-06-21 17:47:53,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123413 conditions, 15169 events. 11012/15169 cut-off events. For 574478/574481 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 79696 event pairs, 3610 based on Foata normal form. 8/15171 useless extension candidates. Maximal degree in co-relation 123335. Up to 14430 conditions per place. [2024-06-21 17:47:53,159 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 289 selfloop transitions, 69 changer transitions 0/363 dead transitions. [2024-06-21 17:47:53,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 363 transitions, 5160 flow [2024-06-21 17:47:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 17:47:53,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-21 17:47:53,160 INFO L175 Difference]: Start difference. First operand has 166 places, 267 transitions, 3219 flow. Second operand 8 states and 198 transitions. [2024-06-21 17:47:53,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 363 transitions, 5160 flow [2024-06-21 17:47:54,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 363 transitions, 5003 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 17:47:54,162 INFO L231 Difference]: Finished difference. Result has 171 places, 292 transitions, 3721 flow [2024-06-21 17:47:54,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3721, PETRI_PLACES=171, PETRI_TRANSITIONS=292} [2024-06-21 17:47:54,163 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-21 17:47:54,163 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 292 transitions, 3721 flow [2024-06-21 17:47:54,164 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) [2024-06-21 17:47:54,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:54,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:54,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:47:54,164 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)] === [2024-06-21 17:47:54,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash 97450769, now seen corresponding path program 2 times [2024-06-21 17:47:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:54,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655603696] [2024-06-21 17:47:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:54,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:57,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:57,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655603696] [2024-06-21 17:47:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655603696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:57,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:57,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:57,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830954628] [2024-06-21 17:47:57,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:57,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:57,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:58,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:47:58,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 292 transitions, 3721 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) [2024-06-21 17:47:58,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:58,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:47:58,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:01,613 INFO L124 PetriNetUnfolderBase]: 11123/15310 cut-off events. [2024-06-21 17:48:01,613 INFO L125 PetriNetUnfolderBase]: For 627403/627403 co-relation queries the response was YES. [2024-06-21 17:48:01,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129944 conditions, 15310 events. 11123/15310 cut-off events. For 627403/627403 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 80092 event pairs, 3632 based on Foata normal form. 8/15314 useless extension candidates. Maximal degree in co-relation 129862. Up to 14927 conditions per place. [2024-06-21 17:48:02,049 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 317 selfloop transitions, 36 changer transitions 0/358 dead transitions. [2024-06-21 17:48:02,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 358 transitions, 5192 flow [2024-06-21 17:48:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 17:48:02,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44471153846153844 [2024-06-21 17:48:02,050 INFO L175 Difference]: Start difference. First operand has 171 places, 292 transitions, 3721 flow. Second operand 8 states and 185 transitions. [2024-06-21 17:48:02,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 358 transitions, 5192 flow [2024-06-21 17:48:02,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 358 transitions, 5004 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-21 17:48:02,999 INFO L231 Difference]: Finished difference. Result has 178 places, 304 transitions, 3849 flow [2024-06-21 17:48:02,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3849, PETRI_PLACES=178, PETRI_TRANSITIONS=304} [2024-06-21 17:48:02,999 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-21 17:48:02,999 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 304 transitions, 3849 flow [2024-06-21 17:48:03,000 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) [2024-06-21 17:48:03,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:03,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:03,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:48:03,000 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)] === [2024-06-21 17:48:03,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1554748673, now seen corresponding path program 3 times [2024-06-21 17:48:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:03,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850548465] [2024-06-21 17:48:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:03,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:06,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:06,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850548465] [2024-06-21 17:48:06,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850548465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:06,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:06,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:06,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285551247] [2024-06-21 17:48:06,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:06,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:06,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:06,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:06,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:06,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 304 transitions, 3849 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) [2024-06-21 17:48:06,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:06,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:06,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:10,439 INFO L124 PetriNetUnfolderBase]: 10807/15028 cut-off events. [2024-06-21 17:48:10,440 INFO L125 PetriNetUnfolderBase]: For 700804/700854 co-relation queries the response was YES. [2024-06-21 17:48:10,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130582 conditions, 15028 events. 10807/15028 cut-off events. For 700804/700854 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 79524 event pairs, 3680 based on Foata normal form. 28/15039 useless extension candidates. Maximal degree in co-relation 130497. Up to 14138 conditions per place. [2024-06-21 17:48:10,650 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 288 selfloop transitions, 34 changer transitions 0/349 dead transitions. [2024-06-21 17:48:10,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 349 transitions, 4751 flow [2024-06-21 17:48:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 17:48:10,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-21 17:48:10,652 INFO L175 Difference]: Start difference. First operand has 178 places, 304 transitions, 3849 flow. Second operand 8 states and 180 transitions. [2024-06-21 17:48:10,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 349 transitions, 4751 flow [2024-06-21 17:48:11,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 349 transitions, 4586 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:11,917 INFO L231 Difference]: Finished difference. Result has 183 places, 307 transitions, 3871 flow [2024-06-21 17:48:11,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3871, PETRI_PLACES=183, PETRI_TRANSITIONS=307} [2024-06-21 17:48:11,918 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 128 predicate places. [2024-06-21 17:48:11,918 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 307 transitions, 3871 flow [2024-06-21 17:48:11,918 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) [2024-06-21 17:48:11,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:11,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:11,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:48:11,918 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)] === [2024-06-21 17:48:11,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1554743899, now seen corresponding path program 3 times [2024-06-21 17:48:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:11,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027770530] [2024-06-21 17:48:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:11,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:15,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:15,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027770530] [2024-06-21 17:48:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027770530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:15,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:15,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133312572] [2024-06-21 17:48:15,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:15,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:15,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:15,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:48:15,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 307 transitions, 3871 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) [2024-06-21 17:48:15,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:15,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:48:15,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:20,386 INFO L124 PetriNetUnfolderBase]: 11273/15529 cut-off events. [2024-06-21 17:48:20,386 INFO L125 PetriNetUnfolderBase]: For 711070/711070 co-relation queries the response was YES. [2024-06-21 17:48:20,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136532 conditions, 15529 events. 11273/15529 cut-off events. For 711070/711070 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 81570 event pairs, 3646 based on Foata normal form. 8/15533 useless extension candidates. Maximal degree in co-relation 136445. Up to 15239 conditions per place. [2024-06-21 17:48:20,586 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 325 selfloop transitions, 32 changer transitions 0/362 dead transitions. [2024-06-21 17:48:20,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 362 transitions, 5078 flow [2024-06-21 17:48:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 17:48:20,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:48:20,588 INFO L175 Difference]: Start difference. First operand has 183 places, 307 transitions, 3871 flow. Second operand 8 states and 182 transitions. [2024-06-21 17:48:20,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 362 transitions, 5078 flow [2024-06-21 17:48:21,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 362 transitions, 4971 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:21,790 INFO L231 Difference]: Finished difference. Result has 186 places, 312 transitions, 3955 flow [2024-06-21 17:48:21,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3955, PETRI_PLACES=186, PETRI_TRANSITIONS=312} [2024-06-21 17:48:21,790 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-21 17:48:21,790 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 312 transitions, 3955 flow [2024-06-21 17:48:21,791 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) [2024-06-21 17:48:21,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:21,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:21,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:48:21,791 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:21,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1267384505, now seen corresponding path program 4 times [2024-06-21 17:48:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:21,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353069742] [2024-06-21 17:48:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:21,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:24,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:24,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353069742] [2024-06-21 17:48:24,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353069742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:24,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:24,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:24,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088298803] [2024-06-21 17:48:24,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:24,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:24,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:24,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:48:24,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 312 transitions, 3955 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) [2024-06-21 17:48:24,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:24,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:48:24,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:29,328 INFO L124 PetriNetUnfolderBase]: 11753/16151 cut-off events. [2024-06-21 17:48:29,328 INFO L125 PetriNetUnfolderBase]: For 761616/761616 co-relation queries the response was YES. [2024-06-21 17:48:29,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143046 conditions, 16151 events. 11753/16151 cut-off events. For 761616/761616 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 85199 event pairs, 3667 based on Foata normal form. 8/16155 useless extension candidates. Maximal degree in co-relation 142957. Up to 15472 conditions per place. [2024-06-21 17:48:29,502 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 329 selfloop transitions, 81 changer transitions 0/415 dead transitions. [2024-06-21 17:48:29,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 415 transitions, 6192 flow [2024-06-21 17:48:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:48:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:48:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-21 17:48:29,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43846153846153846 [2024-06-21 17:48:29,503 INFO L175 Difference]: Start difference. First operand has 186 places, 312 transitions, 3955 flow. Second operand 10 states and 228 transitions. [2024-06-21 17:48:29,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 415 transitions, 6192 flow [2024-06-21 17:48:30,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 415 transitions, 6046 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 17:48:30,835 INFO L231 Difference]: Finished difference. Result has 191 places, 352 transitions, 4773 flow [2024-06-21 17:48:30,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4773, PETRI_PLACES=191, PETRI_TRANSITIONS=352} [2024-06-21 17:48:30,836 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-21 17:48:30,836 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 352 transitions, 4773 flow [2024-06-21 17:48:30,836 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) [2024-06-21 17:48:30,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:30,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:48:30,836 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:30,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 212926265, now seen corresponding path program 1 times [2024-06-21 17:48:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:30,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236598965] [2024-06-21 17:48:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:33,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:33,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236598965] [2024-06-21 17:48:33,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236598965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:33,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:33,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:33,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676838575] [2024-06-21 17:48:33,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:33,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:33,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:33,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:33,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:33,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 17:48:33,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 352 transitions, 4773 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) [2024-06-21 17:48:33,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:33,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 17:48:33,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:38,631 INFO L124 PetriNetUnfolderBase]: 11738/16132 cut-off events. [2024-06-21 17:48:38,631 INFO L125 PetriNetUnfolderBase]: For 811689/811689 co-relation queries the response was YES. [2024-06-21 17:48:38,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148663 conditions, 16132 events. 11738/16132 cut-off events. For 811689/811689 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 85025 event pairs, 3697 based on Foata normal form. 5/16133 useless extension candidates. Maximal degree in co-relation 148571. Up to 15857 conditions per place. [2024-06-21 17:48:38,852 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 344 selfloop transitions, 41 changer transitions 0/390 dead transitions. [2024-06-21 17:48:38,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 390 transitions, 5845 flow [2024-06-21 17:48:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 17:48:38,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-21 17:48:38,854 INFO L175 Difference]: Start difference. First operand has 191 places, 352 transitions, 4773 flow. Second operand 7 states and 158 transitions. [2024-06-21 17:48:38,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 390 transitions, 5845 flow [2024-06-21 17:48:40,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 390 transitions, 5565 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-21 17:48:40,486 INFO L231 Difference]: Finished difference. Result has 194 places, 352 transitions, 4591 flow [2024-06-21 17:48:40,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4493, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4591, PETRI_PLACES=194, PETRI_TRANSITIONS=352} [2024-06-21 17:48:40,487 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-21 17:48:40,487 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 352 transitions, 4591 flow [2024-06-21 17:48:40,487 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) [2024-06-21 17:48:40,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:40,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:40,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:48:40,488 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:40,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:40,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1273818369, now seen corresponding path program 4 times [2024-06-21 17:48:40,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:40,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669628897] [2024-06-21 17:48:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:40,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669628897] [2024-06-21 17:48:43,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669628897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:43,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:43,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:43,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520342878] [2024-06-21 17:48:43,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:43,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:43,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:43,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 352 transitions, 4591 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) [2024-06-21 17:48:43,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:43,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:43,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:48,476 INFO L124 PetriNetUnfolderBase]: 11419/15850 cut-off events. [2024-06-21 17:48:48,477 INFO L125 PetriNetUnfolderBase]: For 875527/875617 co-relation queries the response was YES. [2024-06-21 17:48:48,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146407 conditions, 15850 events. 11419/15850 cut-off events. For 875527/875617 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 84338 event pairs, 3723 based on Foata normal form. 30/15839 useless extension candidates. Maximal degree in co-relation 146313. Up to 14739 conditions per place. [2024-06-21 17:48:48,678 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 309 selfloop transitions, 72 changer transitions 0/417 dead transitions. [2024-06-21 17:48:48,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 417 transitions, 6080 flow [2024-06-21 17:48:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:48:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:48:48,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-21 17:48:48,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2024-06-21 17:48:48,689 INFO L175 Difference]: Start difference. First operand has 194 places, 352 transitions, 4591 flow. Second operand 10 states and 224 transitions. [2024-06-21 17:48:48,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 417 transitions, 6080 flow [2024-06-21 17:48:50,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 417 transitions, 5947 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:50,387 INFO L231 Difference]: Finished difference. Result has 202 places, 366 transitions, 5118 flow [2024-06-21 17:48:50,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5118, PETRI_PLACES=202, PETRI_TRANSITIONS=366} [2024-06-21 17:48:50,388 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 147 predicate places. [2024-06-21 17:48:50,388 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 366 transitions, 5118 flow [2024-06-21 17:48:50,388 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) [2024-06-21 17:48:50,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:50,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:50,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:48:50,389 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:50,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:50,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1273818245, now seen corresponding path program 5 times [2024-06-21 17:48:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:50,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816130837] [2024-06-21 17:48:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:50,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat