./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_power.oepc.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/safe016_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe016_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:14:58,838 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:14:58,889 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:14:58,897 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:14:58,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:14:58,920 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:14:58,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:14:58,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:14:58,924 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:14:58,927 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:14:58,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:14:58,928 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:14:58,929 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:14:58,929 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:14:58,930 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:14:58,930 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:14:58,930 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:14:58,930 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:14:58,931 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:14:58,931 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:14:58,931 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:14:58,931 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:14:58,932 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:14:58,932 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:14:58,932 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:14:58,932 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:14:58,933 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:14:58,933 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:14:58,933 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:14:58,934 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:14:58,934 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:14:58,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:14:58,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:14:58,935 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:14:58,935 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:14:58,935 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:14:58,936 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:14:58,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:14:58,936 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:14:58,936 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:14:58,936 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:14:58,937 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:14:58,937 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:14:58,937 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:14:59,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:14:59,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:14:59,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:14:59,176 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:14:59,177 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:14:59,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe016_power.oepc.yml/witness.yml [2024-06-27 21:14:59,429 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:14:59,429 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:14:59,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_power.oepc.i [2024-06-27 21:15:00,454 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:15:00,652 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:15:00,653 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_power.oepc.i [2024-06-27 21:15:00,665 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8288d9a5/b61700f4c3be405e8527dd7f64f45641/FLAGa9753b28c [2024-06-27 21:15:00,677 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8288d9a5/b61700f4c3be405e8527dd7f64f45641 [2024-06-27 21:15:00,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:15:00,678 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:15:00,679 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:15:00,679 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:15:00,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:15:00,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:14:59" (1/2) ... [2024-06-27 21:15:00,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559f9376 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:00, skipping insertion in model container [2024-06-27 21:15:00,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:14:59" (1/2) ... [2024-06-27 21:15:00,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bbc2573 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:00, skipping insertion in model container [2024-06-27 21:15:00,685 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:15:00" (2/2) ... [2024-06-27 21:15:00,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559f9376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:00, skipping insertion in model container [2024-06-27 21:15:00,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:15:00" (2/2) ... [2024-06-27 21:15:00,686 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:15:00,838 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:15:00,839 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 21:15:00,839 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 21:15:00,839 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 21:15:00,839 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 21:15:00,839 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:15:00,840 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-27 21:15:00,874 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:15:01,299 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:15:01,307 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:15:01,401 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:15:01,449 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:15:01,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01 WrapperNode [2024-06-27 21:15:01,450 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:15:01,450 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:15:01,450 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:15:01,451 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:15:01,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,472 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,523 INFO L138 Inliner]: procedures = 176, calls = 96, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 259 [2024-06-27 21:15:01,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:15:01,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:15:01,530 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:15:01,530 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:15:01,538 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,543 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,566 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-27 21:15:01,567 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,567 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,578 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,584 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:15:01,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:15:01,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:15:01,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:15:01,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (1/1) ... [2024-06-27 21:15:01,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:15:01,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:15:01,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:15:01,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:15:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:15:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:15:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:15:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:15:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:15:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:15:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:15:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:15:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:15:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:15:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:15:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:15:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:15:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:15:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:15:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:15:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:15:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:15:01,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:15:01,668 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:15:01,781 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:15:01,782 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:15:02,228 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:15:02,229 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:15:02,656 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:15:02,656 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:15:02,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:15:02 BoogieIcfgContainer [2024-06-27 21:15:02,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:15:02,658 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:15:02,658 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:15:02,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:15:02,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:14:59" (1/4) ... [2024-06-27 21:15:02,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48aae209 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:15:02, skipping insertion in model container [2024-06-27 21:15:02,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:15:00" (2/4) ... [2024-06-27 21:15:02,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48aae209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:15:02, skipping insertion in model container [2024-06-27 21:15:02,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:01" (3/4) ... [2024-06-27 21:15:02,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48aae209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:15:02, skipping insertion in model container [2024-06-27 21:15:02,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:15:02" (4/4) ... [2024-06-27 21:15:02,667 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_power.oepc.i [2024-06-27 21:15:02,680 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:15:02,681 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:15:02,682 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:15:02,739 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:15:02,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:15:02,798 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 21:15:02,798 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:15:02,801 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 67 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:15:02,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:15:02,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 21:15:02,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:15:02,820 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;@1782fe0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:15:02,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:15:02,841 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:15:02,841 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:15:02,841 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:15:02,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:02,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:15:02,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:02,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash 873984024, now seen corresponding path program 1 times [2024-06-27 21:15:02,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:02,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453463695] [2024-06-27 21:15:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:02,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:04,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:04,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453463695] [2024-06-27 21:15:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453463695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:04,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:04,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:15:04,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053803574] [2024-06-27 21:15:04,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:04,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:15:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:15:04,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:15:04,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:15:04,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:04,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:04,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:15:04,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:06,318 INFO L124 PetriNetUnfolderBase]: 5566/7763 cut-off events. [2024-06-27 21:15:06,319 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-27 21:15:06,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15709 conditions, 7763 events. 5566/7763 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40204 event pairs, 4068 based on Foata normal form. 1/7636 useless extension candidates. Maximal degree in co-relation 15696. Up to 7674 conditions per place. [2024-06-27 21:15:06,355 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 46 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 21:15:06,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 241 flow [2024-06-27 21:15:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:15:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:15:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-06-27 21:15:06,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 21:15:06,365 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 91 transitions. [2024-06-27 21:15:06,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 241 flow [2024-06-27 21:15:06,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:06,370 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 21:15:06,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 21:15:06,373 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 21:15:06,374 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 21:15:06,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:06,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:06,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:06,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:15:06,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:06,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:06,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1914872457, now seen corresponding path program 1 times [2024-06-27 21:15:06,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:06,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473248977] [2024-06-27 21:15:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:06,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:08,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:08,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473248977] [2024-06-27 21:15:08,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473248977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:08,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:08,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:15:08,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60332652] [2024-06-27 21:15:08,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:08,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:15:08,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:15:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:15:08,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:15:08,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:08,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:08,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:15:08,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:10,220 INFO L124 PetriNetUnfolderBase]: 5556/7744 cut-off events. [2024-06-27 21:15:10,220 INFO L125 PetriNetUnfolderBase]: For 1489/1499 co-relation queries the response was YES. [2024-06-27 21:15:10,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17958 conditions, 7744 events. 5556/7744 cut-off events. For 1489/1499 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40099 event pairs, 3547 based on Foata normal form. 7/7747 useless extension candidates. Maximal degree in co-relation 17946. Up to 7633 conditions per place. [2024-06-27 21:15:10,260 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-27 21:15:10,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 345 flow [2024-06-27 21:15:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:15:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:15:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-27 21:15:10,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 21:15:10,262 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 120 transitions. [2024-06-27 21:15:10,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 345 flow [2024-06-27 21:15:10,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:15:10,265 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-27 21:15:10,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-27 21:15:10,265 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-27 21:15:10,266 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-27 21:15:10,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:10,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:10,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:10,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:15:10,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:10,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash 768498241, now seen corresponding path program 1 times [2024-06-27 21:15:10,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:10,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241221574] [2024-06-27 21:15:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:12,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241221574] [2024-06-27 21:15:12,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241221574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:12,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:12,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:15:12,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059932341] [2024-06-27 21:15:12,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:12,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:15:12,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:15:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:15:12,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:15:12,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:12,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:12,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:15:12,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:14,488 INFO L124 PetriNetUnfolderBase]: 6725/9323 cut-off events. [2024-06-27 21:15:14,488 INFO L125 PetriNetUnfolderBase]: For 4925/4925 co-relation queries the response was YES. [2024-06-27 21:15:14,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24128 conditions, 9323 events. 6725/9323 cut-off events. For 4925/4925 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48217 event pairs, 3191 based on Foata normal form. 7/9325 useless extension candidates. Maximal degree in co-relation 24114. Up to 9079 conditions per place. [2024-06-27 21:15:14,546 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 89 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2024-06-27 21:15:14,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 115 transitions, 613 flow [2024-06-27 21:15:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:15:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:15:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-27 21:15:14,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-27 21:15:14,552 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 155 transitions. [2024-06-27 21:15:14,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 115 transitions, 613 flow [2024-06-27 21:15:14,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 115 transitions, 582 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 21:15:14,558 INFO L231 Difference]: Finished difference. Result has 62 places, 68 transitions, 318 flow [2024-06-27 21:15:14,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=62, PETRI_TRANSITIONS=68} [2024-06-27 21:15:14,559 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-27 21:15:14,559 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 68 transitions, 318 flow [2024-06-27 21:15:14,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:14,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:14,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:14,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:15:14,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:14,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -209870424, now seen corresponding path program 1 times [2024-06-27 21:15:14,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:14,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554331923] [2024-06-27 21:15:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:14,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:17,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:17,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554331923] [2024-06-27 21:15:17,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554331923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:17,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:17,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:15:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277578295] [2024-06-27 21:15:17,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:17,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:15:17,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:15:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:15:17,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:15:17,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 68 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:17,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:17,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:15:17,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:19,270 INFO L124 PetriNetUnfolderBase]: 6895/9589 cut-off events. [2024-06-27 21:15:19,270 INFO L125 PetriNetUnfolderBase]: For 11767/11767 co-relation queries the response was YES. [2024-06-27 21:15:19,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29176 conditions, 9589 events. 6895/9589 cut-off events. For 11767/11767 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49845 event pairs, 2460 based on Foata normal form. 32/9616 useless extension candidates. Maximal degree in co-relation 29159. Up to 9063 conditions per place. [2024-06-27 21:15:19,317 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 101 selfloop transitions, 22 changer transitions 0/130 dead transitions. [2024-06-27 21:15:19,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 130 transitions, 762 flow [2024-06-27 21:15:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:15:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:15:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 21:15:19,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-27 21:15:19,320 INFO L175 Difference]: Start difference. First operand has 62 places, 68 transitions, 318 flow. Second operand 6 states and 181 transitions. [2024-06-27 21:15:19,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 130 transitions, 762 flow [2024-06-27 21:15:19,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 130 transitions, 754 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 21:15:19,325 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 383 flow [2024-06-27 21:15:19,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-27 21:15:19,326 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-27 21:15:19,326 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 383 flow [2024-06-27 21:15:19,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:19,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:19,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:19,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:15:19,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:19,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash -933103352, now seen corresponding path program 1 times [2024-06-27 21:15:19,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:19,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876458230] [2024-06-27 21:15:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:19,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:20,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876458230] [2024-06-27 21:15:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876458230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:20,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:20,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:15:20,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803206434] [2024-06-27 21:15:20,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:20,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:15:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:15:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:15:20,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:20,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:20,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:20,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:20,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:22,592 INFO L124 PetriNetUnfolderBase]: 6886/9584 cut-off events. [2024-06-27 21:15:22,592 INFO L125 PetriNetUnfolderBase]: For 16914/16914 co-relation queries the response was YES. [2024-06-27 21:15:22,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31492 conditions, 9584 events. 6886/9584 cut-off events. For 16914/16914 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49894 event pairs, 3060 based on Foata normal form. 3/9584 useless extension candidates. Maximal degree in co-relation 31471. Up to 9469 conditions per place. [2024-06-27 21:15:22,641 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 78 selfloop transitions, 10 changer transitions 0/94 dead transitions. [2024-06-27 21:15:22,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 624 flow [2024-06-27 21:15:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:15:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:15:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:15:22,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-27 21:15:22,645 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 383 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:15:22,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 624 flow [2024-06-27 21:15:22,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 571 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:22,652 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 379 flow [2024-06-27 21:15:22,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-27 21:15:22,653 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-27 21:15:22,653 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 379 flow [2024-06-27 21:15:22,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:22,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:22,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:22,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:15:22,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:22,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash 614697157, now seen corresponding path program 1 times [2024-06-27 21:15:22,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:22,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513311015] [2024-06-27 21:15:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:22,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513311015] [2024-06-27 21:15:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513311015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:25,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:25,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:15:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281585871] [2024-06-27 21:15:25,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:15:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:15:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:15:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:25,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 379 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:25,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:25,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:25,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:27,528 INFO L124 PetriNetUnfolderBase]: 6904/9602 cut-off events. [2024-06-27 21:15:27,528 INFO L125 PetriNetUnfolderBase]: For 19735/19735 co-relation queries the response was YES. [2024-06-27 21:15:27,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32004 conditions, 9602 events. 6904/9602 cut-off events. For 19735/19735 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49877 event pairs, 3051 based on Foata normal form. 6/9603 useless extension candidates. Maximal degree in co-relation 31980. Up to 9348 conditions per place. [2024-06-27 21:15:27,582 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 85 selfloop transitions, 24 changer transitions 0/115 dead transitions. [2024-06-27 21:15:27,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 115 transitions, 750 flow [2024-06-27 21:15:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:15:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:15:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 21:15:27,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-27 21:15:27,585 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 379 flow. Second operand 6 states and 152 transitions. [2024-06-27 21:15:27,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 115 transitions, 750 flow [2024-06-27 21:15:27,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 728 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:15:27,595 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 466 flow [2024-06-27 21:15:27,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-27 21:15:27,598 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-27 21:15:27,598 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 466 flow [2024-06-27 21:15:27,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:27,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:27,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:27,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:15:27,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:27,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash 935897767, now seen corresponding path program 2 times [2024-06-27 21:15:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:27,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627840367] [2024-06-27 21:15:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:27,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:29,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:29,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627840367] [2024-06-27 21:15:29,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627840367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:29,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:29,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:15:29,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675906479] [2024-06-27 21:15:29,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:29,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:15:29,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:15:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:15:29,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:29,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 466 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:29,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:29,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:29,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:31,658 INFO L124 PetriNetUnfolderBase]: 6859/9520 cut-off events. [2024-06-27 21:15:31,658 INFO L125 PetriNetUnfolderBase]: For 23934/23934 co-relation queries the response was YES. [2024-06-27 21:15:31,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32747 conditions, 9520 events. 6859/9520 cut-off events. For 23934/23934 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 49174 event pairs, 3071 based on Foata normal form. 3/9514 useless extension candidates. Maximal degree in co-relation 32721. Up to 9279 conditions per place. [2024-06-27 21:15:31,707 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 77 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-27 21:15:31,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 756 flow [2024-06-27 21:15:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:15:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:15:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 21:15:31,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-27 21:15:31,709 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 466 flow. Second operand 6 states and 146 transitions. [2024-06-27 21:15:31,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 756 flow [2024-06-27 21:15:31,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 719 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:15:31,721 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 500 flow [2024-06-27 21:15:31,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=500, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-27 21:15:31,722 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-27 21:15:31,722 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 500 flow [2024-06-27 21:15:31,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:31,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:31,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:31,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:15:31,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:31,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:31,723 INFO L85 PathProgramCache]: Analyzing trace with hash 620419013, now seen corresponding path program 1 times [2024-06-27 21:15:31,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:31,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621287125] [2024-06-27 21:15:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:33,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621287125] [2024-06-27 21:15:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621287125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:15:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262594596] [2024-06-27 21:15:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:15:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:15:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:15:33,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:33,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 500 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:33,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:33,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:33,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:35,377 INFO L124 PetriNetUnfolderBase]: 6844/9510 cut-off events. [2024-06-27 21:15:35,377 INFO L125 PetriNetUnfolderBase]: For 28023/28023 co-relation queries the response was YES. [2024-06-27 21:15:35,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33427 conditions, 9510 events. 6844/9510 cut-off events. For 28023/28023 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 49164 event pairs, 2897 based on Foata normal form. 6/9513 useless extension candidates. Maximal degree in co-relation 33400. Up to 9360 conditions per place. [2024-06-27 21:15:35,433 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 94 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2024-06-27 21:15:35,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 814 flow [2024-06-27 21:15:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:15:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:15:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 21:15:35,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-27 21:15:35,436 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 500 flow. Second operand 6 states and 141 transitions. [2024-06-27 21:15:35,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 814 flow [2024-06-27 21:15:35,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 775 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:15:35,465 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 525 flow [2024-06-27 21:15:35,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=525, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-27 21:15:35,467 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-27 21:15:35,467 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 525 flow [2024-06-27 21:15:35,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:35,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:35,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:35,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:15:35,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:35,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:35,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1981456860, now seen corresponding path program 1 times [2024-06-27 21:15:35,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:35,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823487178] [2024-06-27 21:15:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:35,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:38,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:38,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823487178] [2024-06-27 21:15:38,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823487178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:38,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:38,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:38,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602084332] [2024-06-27 21:15:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:38,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:38,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:38,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 525 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:38,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:38,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:38,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:40,588 INFO L124 PetriNetUnfolderBase]: 7044/9813 cut-off events. [2024-06-27 21:15:40,589 INFO L125 PetriNetUnfolderBase]: For 36849/36849 co-relation queries the response was YES. [2024-06-27 21:15:40,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36154 conditions, 9813 events. 7044/9813 cut-off events. For 36849/36849 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51028 event pairs, 2962 based on Foata normal form. 30/9838 useless extension candidates. Maximal degree in co-relation 36125. Up to 9328 conditions per place. [2024-06-27 21:15:40,646 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2024-06-27 21:15:40,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 132 transitions, 923 flow [2024-06-27 21:15:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 21:15:40,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:15:40,649 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 525 flow. Second operand 7 states and 175 transitions. [2024-06-27 21:15:40,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 132 transitions, 923 flow [2024-06-27 21:15:40,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 132 transitions, 885 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:40,677 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 586 flow [2024-06-27 21:15:40,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=586, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-06-27 21:15:40,678 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-27 21:15:40,678 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 586 flow [2024-06-27 21:15:40,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:40,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:40,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:40,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:15:40,679 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:40,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1749651334, now seen corresponding path program 2 times [2024-06-27 21:15:40,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:40,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300080398] [2024-06-27 21:15:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:43,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:43,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300080398] [2024-06-27 21:15:43,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300080398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:43,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:43,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:43,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807731966] [2024-06-27 21:15:43,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:43,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:43,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:43,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:43,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 586 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:43,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:43,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:43,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:45,595 INFO L124 PetriNetUnfolderBase]: 7088/9883 cut-off events. [2024-06-27 21:15:45,596 INFO L125 PetriNetUnfolderBase]: For 45030/45030 co-relation queries the response was YES. [2024-06-27 21:15:45,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38481 conditions, 9883 events. 7088/9883 cut-off events. For 45030/45030 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51388 event pairs, 3024 based on Foata normal form. 6/9880 useless extension candidates. Maximal degree in co-relation 38451. Up to 9584 conditions per place. [2024-06-27 21:15:45,656 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 93 selfloop transitions, 29 changer transitions 0/128 dead transitions. [2024-06-27 21:15:45,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 962 flow [2024-06-27 21:15:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 21:15:45,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:15:45,659 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 586 flow. Second operand 7 states and 169 transitions. [2024-06-27 21:15:45,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 962 flow [2024-06-27 21:15:45,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 895 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:45,713 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 625 flow [2024-06-27 21:15:45,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=625, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-27 21:15:45,713 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-27 21:15:45,713 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 625 flow [2024-06-27 21:15:45,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:45,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:45,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:15:45,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:45,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash -785137786, now seen corresponding path program 3 times [2024-06-27 21:15:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:45,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562576395] [2024-06-27 21:15:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:45,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562576395] [2024-06-27 21:15:48,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562576395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:48,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:48,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:48,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823315370] [2024-06-27 21:15:48,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:48,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:48,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:48,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:48,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:48,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 625 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:48,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:48,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:48,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:50,471 INFO L124 PetriNetUnfolderBase]: 7073/9862 cut-off events. [2024-06-27 21:15:50,472 INFO L125 PetriNetUnfolderBase]: For 53928/53928 co-relation queries the response was YES. [2024-06-27 21:15:50,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39906 conditions, 9862 events. 7073/9862 cut-off events. For 53928/53928 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51132 event pairs, 2662 based on Foata normal form. 6/9859 useless extension candidates. Maximal degree in co-relation 39875. Up to 9247 conditions per place. [2024-06-27 21:15:50,531 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 92 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-06-27 21:15:50,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 1033 flow [2024-06-27 21:15:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 21:15:50,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-27 21:15:50,533 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 625 flow. Second operand 7 states and 173 transitions. [2024-06-27 21:15:50,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 1033 flow [2024-06-27 21:15:50,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 135 transitions, 953 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:50,557 INFO L231 Difference]: Finished difference. Result has 86 places, 90 transitions, 673 flow [2024-06-27 21:15:50,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=673, PETRI_PLACES=86, PETRI_TRANSITIONS=90} [2024-06-27 21:15:50,558 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-27 21:15:50,558 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 90 transitions, 673 flow [2024-06-27 21:15:50,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:50,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:50,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:15:50,559 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:50,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2032635536, now seen corresponding path program 1 times [2024-06-27 21:15:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:50,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196568194] [2024-06-27 21:15:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:53,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:53,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196568194] [2024-06-27 21:15:53,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196568194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:53,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:53,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:53,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873566334] [2024-06-27 21:15:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:53,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:53,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:53,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:53,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:53,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 90 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:53,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:53,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:53,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:55,115 INFO L124 PetriNetUnfolderBase]: 7938/11209 cut-off events. [2024-06-27 21:15:55,116 INFO L125 PetriNetUnfolderBase]: For 70739/70739 co-relation queries the response was YES. [2024-06-27 21:15:55,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46923 conditions, 11209 events. 7938/11209 cut-off events. For 70739/70739 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 60349 event pairs, 3089 based on Foata normal form. 18/11220 useless extension candidates. Maximal degree in co-relation 46891. Up to 9939 conditions per place. [2024-06-27 21:15:55,182 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 133 selfloop transitions, 49 changer transitions 0/188 dead transitions. [2024-06-27 21:15:55,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 188 transitions, 1588 flow [2024-06-27 21:15:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 21:15:55,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:15:55,185 INFO L175 Difference]: Start difference. First operand has 86 places, 90 transitions, 673 flow. Second operand 8 states and 208 transitions. [2024-06-27 21:15:55,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 188 transitions, 1588 flow [2024-06-27 21:15:55,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 188 transitions, 1440 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:55,239 INFO L231 Difference]: Finished difference. Result has 91 places, 117 transitions, 955 flow [2024-06-27 21:15:55,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=955, PETRI_PLACES=91, PETRI_TRANSITIONS=117} [2024-06-27 21:15:55,240 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2024-06-27 21:15:55,240 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 117 transitions, 955 flow [2024-06-27 21:15:55,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:55,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:55,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:55,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:15:55,241 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:55,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:55,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1253493814, now seen corresponding path program 2 times [2024-06-27 21:15:55,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:55,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326070250] [2024-06-27 21:15:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:57,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:57,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326070250] [2024-06-27 21:15:57,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326070250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:57,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:57,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:57,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927154603] [2024-06-27 21:15:57,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:57,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:57,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:57,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:57,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:57,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 955 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:57,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:57,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:57,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:00,190 INFO L124 PetriNetUnfolderBase]: 8142/11547 cut-off events. [2024-06-27 21:16:00,190 INFO L125 PetriNetUnfolderBase]: For 88140/88142 co-relation queries the response was YES. [2024-06-27 21:16:00,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50502 conditions, 11547 events. 8142/11547 cut-off events. For 88140/88142 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 63181 event pairs, 2351 based on Foata normal form. 18/11558 useless extension candidates. Maximal degree in co-relation 50467. Up to 9394 conditions per place. [2024-06-27 21:16:00,268 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 111 selfloop transitions, 57 changer transitions 0/174 dead transitions. [2024-06-27 21:16:00,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 174 transitions, 1585 flow [2024-06-27 21:16:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 21:16:00,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49175824175824173 [2024-06-27 21:16:00,270 INFO L175 Difference]: Start difference. First operand has 91 places, 117 transitions, 955 flow. Second operand 7 states and 179 transitions. [2024-06-27 21:16:00,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 174 transitions, 1585 flow [2024-06-27 21:16:00,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1551 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 21:16:00,375 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1123 flow [2024-06-27 21:16:00,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1123, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-27 21:16:00,375 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-27 21:16:00,376 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1123 flow [2024-06-27 21:16:00,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:00,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:00,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:00,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:16:00,376 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:00,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:00,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1295618762, now seen corresponding path program 1 times [2024-06-27 21:16:00,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:00,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617296940] [2024-06-27 21:16:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:02,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:02,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617296940] [2024-06-27 21:16:02,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617296940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:02,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:02,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:02,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65317319] [2024-06-27 21:16:02,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:02,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:03,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:03,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1123 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:03,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:03,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:03,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:05,342 INFO L124 PetriNetUnfolderBase]: 8064/11433 cut-off events. [2024-06-27 21:16:05,342 INFO L125 PetriNetUnfolderBase]: For 101290/101292 co-relation queries the response was YES. [2024-06-27 21:16:05,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51538 conditions, 11433 events. 8064/11433 cut-off events. For 101290/101292 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 62452 event pairs, 2309 based on Foata normal form. 36/11462 useless extension candidates. Maximal degree in co-relation 51501. Up to 9358 conditions per place. [2024-06-27 21:16:05,411 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 108 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-27 21:16:05,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 171 transitions, 1597 flow [2024-06-27 21:16:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 21:16:05,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 21:16:05,414 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1123 flow. Second operand 7 states and 176 transitions. [2024-06-27 21:16:05,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 171 transitions, 1597 flow [2024-06-27 21:16:05,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1498 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 21:16:05,559 INFO L231 Difference]: Finished difference. Result has 99 places, 121 transitions, 1150 flow [2024-06-27 21:16:05,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1150, PETRI_PLACES=99, PETRI_TRANSITIONS=121} [2024-06-27 21:16:05,560 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-27 21:16:05,560 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 121 transitions, 1150 flow [2024-06-27 21:16:05,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:05,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:05,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:05,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:16:05,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:05,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:05,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1359206380, now seen corresponding path program 2 times [2024-06-27 21:16:05,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:05,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307148495] [2024-06-27 21:16:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:05,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:08,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:08,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307148495] [2024-06-27 21:16:08,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307148495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:08,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:08,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:08,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435164101] [2024-06-27 21:16:08,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:08,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:08,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:08,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 1150 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:08,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:08,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:08,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:10,244 INFO L124 PetriNetUnfolderBase]: 8025/11365 cut-off events. [2024-06-27 21:16:10,244 INFO L125 PetriNetUnfolderBase]: For 94312/94326 co-relation queries the response was YES. [2024-06-27 21:16:10,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50866 conditions, 11365 events. 8025/11365 cut-off events. For 94312/94326 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 61921 event pairs, 1828 based on Foata normal form. 20/11362 useless extension candidates. Maximal degree in co-relation 50828. Up to 9071 conditions per place. [2024-06-27 21:16:10,329 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 99 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-27 21:16:10,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 166 transitions, 1604 flow [2024-06-27 21:16:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 21:16:10,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:16:10,331 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 1150 flow. Second operand 7 states and 168 transitions. [2024-06-27 21:16:10,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 166 transitions, 1604 flow [2024-06-27 21:16:10,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1444 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:10,412 INFO L231 Difference]: Finished difference. Result has 99 places, 122 transitions, 1131 flow [2024-06-27 21:16:10,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=99, PETRI_TRANSITIONS=122} [2024-06-27 21:16:10,413 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-27 21:16:10,413 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 122 transitions, 1131 flow [2024-06-27 21:16:10,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:10,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:10,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:10,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:16:10,414 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:10,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1185666600, now seen corresponding path program 1 times [2024-06-27 21:16:10,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:10,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138402836] [2024-06-27 21:16:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:10,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:12,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:12,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138402836] [2024-06-27 21:16:12,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138402836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:12,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:12,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:16:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330020154] [2024-06-27 21:16:12,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:12,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:16:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:16:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:16:12,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:12,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 122 transitions, 1131 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:12,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:12,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:12,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:14,222 INFO L124 PetriNetUnfolderBase]: 8051/11442 cut-off events. [2024-06-27 21:16:14,223 INFO L125 PetriNetUnfolderBase]: For 101070/101074 co-relation queries the response was YES. [2024-06-27 21:16:14,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51880 conditions, 11442 events. 8051/11442 cut-off events. For 101070/101074 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 62780 event pairs, 3276 based on Foata normal form. 10/11447 useless extension candidates. Maximal degree in co-relation 51841. Up to 11121 conditions per place. [2024-06-27 21:16:14,291 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 133 selfloop transitions, 17 changer transitions 0/156 dead transitions. [2024-06-27 21:16:14,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 156 transitions, 1611 flow [2024-06-27 21:16:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:16:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:16:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 21:16:14,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653846153846154 [2024-06-27 21:16:14,293 INFO L175 Difference]: Start difference. First operand has 99 places, 122 transitions, 1131 flow. Second operand 5 states and 121 transitions. [2024-06-27 21:16:14,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 156 transitions, 1611 flow [2024-06-27 21:16:14,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1464 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:14,403 INFO L231 Difference]: Finished difference. Result has 100 places, 132 transitions, 1125 flow [2024-06-27 21:16:14,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1125, PETRI_PLACES=100, PETRI_TRANSITIONS=132} [2024-06-27 21:16:14,404 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-27 21:16:14,404 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 132 transitions, 1125 flow [2024-06-27 21:16:14,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:14,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:14,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:14,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:16:14,405 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)] === [2024-06-27 21:16:14,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:14,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1903807962, now seen corresponding path program 1 times [2024-06-27 21:16:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:14,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34089470] [2024-06-27 21:16:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:14,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:16,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:16,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34089470] [2024-06-27 21:16:16,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34089470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:16,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:16,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:16:16,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316511887] [2024-06-27 21:16:16,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:16,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:16:16,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:16:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:16:16,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:16,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 132 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:16,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:16,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:16,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:18,469 INFO L124 PetriNetUnfolderBase]: 8070/11473 cut-off events. [2024-06-27 21:16:18,469 INFO L125 PetriNetUnfolderBase]: For 113360/113366 co-relation queries the response was YES. [2024-06-27 21:16:18,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54133 conditions, 11473 events. 8070/11473 cut-off events. For 113360/113366 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 62907 event pairs, 3261 based on Foata normal form. 6/11474 useless extension candidates. Maximal degree in co-relation 54092. Up to 11195 conditions per place. [2024-06-27 21:16:18,530 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 142 selfloop transitions, 21 changer transitions 0/169 dead transitions. [2024-06-27 21:16:18,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1685 flow [2024-06-27 21:16:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:16:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:16:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 21:16:18,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-27 21:16:18,532 INFO L175 Difference]: Start difference. First operand has 100 places, 132 transitions, 1125 flow. Second operand 6 states and 139 transitions. [2024-06-27 21:16:18,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1685 flow [2024-06-27 21:16:18,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 169 transitions, 1649 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 21:16:18,605 INFO L231 Difference]: Finished difference. Result has 105 places, 140 transitions, 1240 flow [2024-06-27 21:16:18,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1240, PETRI_PLACES=105, PETRI_TRANSITIONS=140} [2024-06-27 21:16:18,606 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-27 21:16:18,607 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 140 transitions, 1240 flow [2024-06-27 21:16:18,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:18,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:18,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:18,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:16:18,607 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:18,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1183168632, now seen corresponding path program 2 times [2024-06-27 21:16:18,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:18,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236079956] [2024-06-27 21:16:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:20,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236079956] [2024-06-27 21:16:20,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236079956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:20,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:20,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:16:20,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275686596] [2024-06-27 21:16:20,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:20,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:16:20,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:16:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:16:20,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:20,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 140 transitions, 1240 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:20,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:20,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:20,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:22,620 INFO L124 PetriNetUnfolderBase]: 8063/11464 cut-off events. [2024-06-27 21:16:22,621 INFO L125 PetriNetUnfolderBase]: For 128663/128669 co-relation queries the response was YES. [2024-06-27 21:16:22,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56376 conditions, 11464 events. 8063/11464 cut-off events. For 128663/128669 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 62987 event pairs, 3261 based on Foata normal form. 6/11465 useless extension candidates. Maximal degree in co-relation 56332. Up to 11199 conditions per place. [2024-06-27 21:16:22,701 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 139 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2024-06-27 21:16:22,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 162 transitions, 1616 flow [2024-06-27 21:16:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:16:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:16:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:16:22,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-27 21:16:22,703 INFO L175 Difference]: Start difference. First operand has 105 places, 140 transitions, 1240 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:16:22,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 162 transitions, 1616 flow [2024-06-27 21:16:22,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 1538 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 21:16:22,818 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1210 flow [2024-06-27 21:16:22,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1210, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2024-06-27 21:16:22,818 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-27 21:16:22,819 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1210 flow [2024-06-27 21:16:22,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:22,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:22,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:22,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:16:22,819 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:22,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash 933911794, now seen corresponding path program 1 times [2024-06-27 21:16:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:22,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200355443] [2024-06-27 21:16:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:22,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:26,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:26,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200355443] [2024-06-27 21:16:26,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200355443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:26,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:26,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:26,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078817291] [2024-06-27 21:16:26,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:26,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:26,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:26,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:26,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:26,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:26,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1210 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:26,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:26,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:26,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:28,683 INFO L124 PetriNetUnfolderBase]: 8127/11542 cut-off events. [2024-06-27 21:16:28,683 INFO L125 PetriNetUnfolderBase]: For 140057/140079 co-relation queries the response was YES. [2024-06-27 21:16:28,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57513 conditions, 11542 events. 8127/11542 cut-off events. For 140057/140079 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 63431 event pairs, 2974 based on Foata normal form. 26/11561 useless extension candidates. Maximal degree in co-relation 57467. Up to 10859 conditions per place. [2024-06-27 21:16:28,769 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 138 selfloop transitions, 60 changer transitions 0/204 dead transitions. [2024-06-27 21:16:28,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 204 transitions, 2059 flow [2024-06-27 21:16:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 21:16:28,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-27 21:16:28,771 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1210 flow. Second operand 7 states and 178 transitions. [2024-06-27 21:16:28,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 204 transitions, 2059 flow [2024-06-27 21:16:28,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 204 transitions, 2008 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:28,867 INFO L231 Difference]: Finished difference. Result has 111 places, 155 transitions, 1515 flow [2024-06-27 21:16:28,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=111, PETRI_TRANSITIONS=155} [2024-06-27 21:16:28,868 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-27 21:16:28,868 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 155 transitions, 1515 flow [2024-06-27 21:16:28,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:28,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:28,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:16:28,868 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:28,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash 137919247, now seen corresponding path program 1 times [2024-06-27 21:16:28,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:28,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92091429] [2024-06-27 21:16:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:28,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92091429] [2024-06-27 21:16:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92091429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:31,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:31,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:31,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575478169] [2024-06-27 21:16:31,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:31,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:31,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 155 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:31,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:31,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:31,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:33,979 INFO L124 PetriNetUnfolderBase]: 8430/11956 cut-off events. [2024-06-27 21:16:33,979 INFO L125 PetriNetUnfolderBase]: For 156528/156542 co-relation queries the response was YES. [2024-06-27 21:16:34,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63435 conditions, 11956 events. 8430/11956 cut-off events. For 156528/156542 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 65462 event pairs, 2968 based on Foata normal form. 22/11975 useless extension candidates. Maximal degree in co-relation 63388. Up to 11475 conditions per place. [2024-06-27 21:16:34,068 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 185 selfloop transitions, 38 changer transitions 0/229 dead transitions. [2024-06-27 21:16:34,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 229 transitions, 2449 flow [2024-06-27 21:16:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 21:16:34,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:16:34,071 INFO L175 Difference]: Start difference. First operand has 111 places, 155 transitions, 1515 flow. Second operand 9 states and 208 transitions. [2024-06-27 21:16:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 229 transitions, 2449 flow [2024-06-27 21:16:34,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 229 transitions, 2356 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 21:16:34,219 INFO L231 Difference]: Finished difference. Result has 120 places, 174 transitions, 1737 flow [2024-06-27 21:16:34,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=120, PETRI_TRANSITIONS=174} [2024-06-27 21:16:34,220 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-27 21:16:34,220 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 174 transitions, 1737 flow [2024-06-27 21:16:34,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:34,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:34,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:34,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:16:34,221 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:34,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:34,221 INFO L85 PathProgramCache]: Analyzing trace with hash 934180564, now seen corresponding path program 2 times [2024-06-27 21:16:34,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:34,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943133462] [2024-06-27 21:16:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:34,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:37,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:37,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943133462] [2024-06-27 21:16:37,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943133462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:37,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:37,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:37,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752524213] [2024-06-27 21:16:37,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:37,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:37,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:37,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:37,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 174 transitions, 1737 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:37,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:37,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:37,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:39,677 INFO L124 PetriNetUnfolderBase]: 8525/12107 cut-off events. [2024-06-27 21:16:39,677 INFO L125 PetriNetUnfolderBase]: For 176277/176291 co-relation queries the response was YES. [2024-06-27 21:16:39,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67325 conditions, 12107 events. 8525/12107 cut-off events. For 176277/176291 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 66711 event pairs, 2986 based on Foata normal form. 18/12122 useless extension candidates. Maximal degree in co-relation 67274. Up to 11713 conditions per place. [2024-06-27 21:16:39,775 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 190 selfloop transitions, 33 changer transitions 0/229 dead transitions. [2024-06-27 21:16:39,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 229 transitions, 2512 flow [2024-06-27 21:16:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 21:16:39,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43990384615384615 [2024-06-27 21:16:39,778 INFO L175 Difference]: Start difference. First operand has 120 places, 174 transitions, 1737 flow. Second operand 8 states and 183 transitions. [2024-06-27 21:16:39,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 229 transitions, 2512 flow [2024-06-27 21:16:39,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 229 transitions, 2406 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 21:16:39,983 INFO L231 Difference]: Finished difference. Result has 126 places, 184 transitions, 1859 flow [2024-06-27 21:16:39,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1859, PETRI_PLACES=126, PETRI_TRANSITIONS=184} [2024-06-27 21:16:39,984 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-27 21:16:39,984 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 184 transitions, 1859 flow [2024-06-27 21:16:39,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:39,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:39,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:16:39,985 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:39,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash 863062567, now seen corresponding path program 2 times [2024-06-27 21:16:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244914736] [2024-06-27 21:16:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:39,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:42,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:42,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244914736] [2024-06-27 21:16:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244914736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:42,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:42,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687215526] [2024-06-27 21:16:42,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:42,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:42,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:42,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:42,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:42,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:42,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 184 transitions, 1859 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:42,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:42,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:42,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:45,211 INFO L124 PetriNetUnfolderBase]: 8639/12258 cut-off events. [2024-06-27 21:16:45,211 INFO L125 PetriNetUnfolderBase]: For 188520/188589 co-relation queries the response was YES. [2024-06-27 21:16:45,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68748 conditions, 12258 events. 8639/12258 cut-off events. For 188520/188589 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 67402 event pairs, 2978 based on Foata normal form. 56/12307 useless extension candidates. Maximal degree in co-relation 68694. Up to 11484 conditions per place. [2024-06-27 21:16:45,320 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 178 selfloop transitions, 55 changer transitions 0/239 dead transitions. [2024-06-27 21:16:45,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 239 transitions, 2796 flow [2024-06-27 21:16:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:16:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:16:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 21:16:45,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:16:45,322 INFO L175 Difference]: Start difference. First operand has 126 places, 184 transitions, 1859 flow. Second operand 6 states and 147 transitions. [2024-06-27 21:16:45,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 239 transitions, 2796 flow [2024-06-27 21:16:45,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 239 transitions, 2696 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:45,568 INFO L231 Difference]: Finished difference. Result has 128 places, 203 transitions, 2163 flow [2024-06-27 21:16:45,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2163, PETRI_PLACES=128, PETRI_TRANSITIONS=203} [2024-06-27 21:16:45,568 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-27 21:16:45,568 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 203 transitions, 2163 flow [2024-06-27 21:16:45,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:45,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:45,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:45,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:16:45,569 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:45,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1976295175, now seen corresponding path program 3 times [2024-06-27 21:16:45,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:45,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141707190] [2024-06-27 21:16:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:45,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:48,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:48,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141707190] [2024-06-27 21:16:48,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141707190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:48,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:48,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:48,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114582163] [2024-06-27 21:16:48,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:48,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:48,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:48,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:48,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:48,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 203 transitions, 2163 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:48,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:48,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:48,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:50,837 INFO L124 PetriNetUnfolderBase]: 8621/12231 cut-off events. [2024-06-27 21:16:50,838 INFO L125 PetriNetUnfolderBase]: For 212535/212549 co-relation queries the response was YES. [2024-06-27 21:16:50,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72017 conditions, 12231 events. 8621/12231 cut-off events. For 212535/212549 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 67182 event pairs, 2976 based on Foata normal form. 22/12250 useless extension candidates. Maximal degree in co-relation 71961. Up to 11716 conditions per place. [2024-06-27 21:16:50,937 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 196 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-06-27 21:16:50,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 243 transitions, 2807 flow [2024-06-27 21:16:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 21:16:50,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-27 21:16:50,938 INFO L175 Difference]: Start difference. First operand has 128 places, 203 transitions, 2163 flow. Second operand 7 states and 164 transitions. [2024-06-27 21:16:50,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 243 transitions, 2807 flow [2024-06-27 21:16:51,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 243 transitions, 2717 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-27 21:16:51,227 INFO L231 Difference]: Finished difference. Result has 135 places, 204 transitions, 2208 flow [2024-06-27 21:16:51,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2208, PETRI_PLACES=135, PETRI_TRANSITIONS=204} [2024-06-27 21:16:51,227 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-27 21:16:51,228 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 204 transitions, 2208 flow [2024-06-27 21:16:51,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:51,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:51,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:51,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:16:51,228 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:51,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:51,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1976294834, now seen corresponding path program 3 times [2024-06-27 21:16:51,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:51,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709129870] [2024-06-27 21:16:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:51,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:53,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709129870] [2024-06-27 21:16:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709129870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:53,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:53,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863418834] [2024-06-27 21:16:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:53,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:53,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:53,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:53,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 204 transitions, 2208 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:53,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:53,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:53,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:56,934 INFO L124 PetriNetUnfolderBase]: 8690/12336 cut-off events. [2024-06-27 21:16:56,935 INFO L125 PetriNetUnfolderBase]: For 216775/216787 co-relation queries the response was YES. [2024-06-27 21:16:56,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71338 conditions, 12336 events. 8690/12336 cut-off events. For 216775/216787 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 67981 event pairs, 2998 based on Foata normal form. 16/12349 useless extension candidates. Maximal degree in co-relation 71278. Up to 11634 conditions per place. [2024-06-27 21:16:57,030 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 195 selfloop transitions, 74 changer transitions 0/275 dead transitions. [2024-06-27 21:16:57,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 275 transitions, 3146 flow [2024-06-27 21:16:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 21:16:57,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-27 21:16:57,032 INFO L175 Difference]: Start difference. First operand has 135 places, 204 transitions, 2208 flow. Second operand 8 states and 202 transitions. [2024-06-27 21:16:57,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 275 transitions, 3146 flow [2024-06-27 21:16:57,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 275 transitions, 3046 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:16:57,275 INFO L231 Difference]: Finished difference. Result has 140 places, 213 transitions, 2467 flow [2024-06-27 21:16:57,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2467, PETRI_PLACES=140, PETRI_TRANSITIONS=213} [2024-06-27 21:16:57,275 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-27 21:16:57,276 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 213 transitions, 2467 flow [2024-06-27 21:16:57,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:57,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:57,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:57,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:16:57,276 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:57,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1250626777, now seen corresponding path program 1 times [2024-06-27 21:16:57,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:57,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112755511] [2024-06-27 21:16:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:59,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:59,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112755511] [2024-06-27 21:16:59,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112755511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:59,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:59,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:59,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048595478] [2024-06-27 21:16:59,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:59,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:59,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:59,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:16:59,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 213 transitions, 2467 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:59,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:59,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:16:59,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:02,092 INFO L124 PetriNetUnfolderBase]: 8834/12530 cut-off events. [2024-06-27 21:17:02,092 INFO L125 PetriNetUnfolderBase]: For 233585/233587 co-relation queries the response was YES. [2024-06-27 21:17:02,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73622 conditions, 12530 events. 8834/12530 cut-off events. For 233585/233587 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 68947 event pairs, 3230 based on Foata normal form. 8/12532 useless extension candidates. Maximal degree in co-relation 73560. Up to 11888 conditions per place. [2024-06-27 21:17:02,368 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 232 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-27 21:17:02,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 275 transitions, 3521 flow [2024-06-27 21:17:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 21:17:02,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:17:02,370 INFO L175 Difference]: Start difference. First operand has 140 places, 213 transitions, 2467 flow. Second operand 7 states and 175 transitions. [2024-06-27 21:17:02,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 275 transitions, 3521 flow [2024-06-27 21:17:02,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 275 transitions, 3375 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:02,685 INFO L231 Difference]: Finished difference. Result has 144 places, 228 transitions, 2613 flow [2024-06-27 21:17:02,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2613, PETRI_PLACES=144, PETRI_TRANSITIONS=228} [2024-06-27 21:17:02,686 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-27 21:17:02,687 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 228 transitions, 2613 flow [2024-06-27 21:17:02,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:02,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:02,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:02,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:17:02,687 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:02,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash -60284691, now seen corresponding path program 2 times [2024-06-27 21:17:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:02,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237306425] [2024-06-27 21:17:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:04,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:04,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237306425] [2024-06-27 21:17:04,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237306425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:04,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:04,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:04,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716118165] [2024-06-27 21:17:04,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:04,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:04,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:04,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:04,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:17:04,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 228 transitions, 2613 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:04,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:04,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:17:04,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:07,778 INFO L124 PetriNetUnfolderBase]: 8956/12699 cut-off events. [2024-06-27 21:17:07,778 INFO L125 PetriNetUnfolderBase]: For 246435/246439 co-relation queries the response was YES. [2024-06-27 21:17:07,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77246 conditions, 12699 events. 8956/12699 cut-off events. For 246435/246439 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 69891 event pairs, 3221 based on Foata normal form. 10/12704 useless extension candidates. Maximal degree in co-relation 77181. Up to 12084 conditions per place. [2024-06-27 21:17:07,897 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 246 selfloop transitions, 39 changer transitions 0/291 dead transitions. [2024-06-27 21:17:07,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 291 transitions, 3685 flow [2024-06-27 21:17:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 21:17:07,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:17:07,899 INFO L175 Difference]: Start difference. First operand has 144 places, 228 transitions, 2613 flow. Second operand 8 states and 196 transitions. [2024-06-27 21:17:07,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 291 transitions, 3685 flow [2024-06-27 21:17:08,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 291 transitions, 3578 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-27 21:17:08,296 INFO L231 Difference]: Finished difference. Result has 151 places, 239 transitions, 2785 flow [2024-06-27 21:17:08,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2785, PETRI_PLACES=151, PETRI_TRANSITIONS=239} [2024-06-27 21:17:08,297 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-27 21:17:08,297 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 239 transitions, 2785 flow [2024-06-27 21:17:08,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:08,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:08,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:08,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:17:08,297 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:08,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1994354287, now seen corresponding path program 3 times [2024-06-27 21:17:08,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:08,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554444990] [2024-06-27 21:17:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:08,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:10,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:10,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554444990] [2024-06-27 21:17:10,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554444990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:10,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:10,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:10,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345593979] [2024-06-27 21:17:10,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:10,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:10,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:10,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:17:10,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 239 transitions, 2785 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:10,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:10,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:17:10,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:13,225 INFO L124 PetriNetUnfolderBase]: 8938/12678 cut-off events. [2024-06-27 21:17:13,225 INFO L125 PetriNetUnfolderBase]: For 263100/263102 co-relation queries the response was YES. [2024-06-27 21:17:13,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78010 conditions, 12678 events. 8938/12678 cut-off events. For 263100/263102 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 69801 event pairs, 3245 based on Foata normal form. 8/12680 useless extension candidates. Maximal degree in co-relation 77942. Up to 12074 conditions per place. [2024-06-27 21:17:13,329 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 234 selfloop transitions, 35 changer transitions 0/275 dead transitions. [2024-06-27 21:17:13,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 275 transitions, 3531 flow [2024-06-27 21:17:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:17:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:17:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 21:17:13,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:17:13,331 INFO L175 Difference]: Start difference. First operand has 151 places, 239 transitions, 2785 flow. Second operand 6 states and 150 transitions. [2024-06-27 21:17:13,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 275 transitions, 3531 flow [2024-06-27 21:17:13,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 275 transitions, 3380 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 21:17:13,674 INFO L231 Difference]: Finished difference. Result has 153 places, 239 transitions, 2715 flow [2024-06-27 21:17:13,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2715, PETRI_PLACES=153, PETRI_TRANSITIONS=239} [2024-06-27 21:17:13,674 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-27 21:17:13,675 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 239 transitions, 2715 flow [2024-06-27 21:17:13,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:13,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:13,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:13,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:17:13,676 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:13,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1976695013, now seen corresponding path program 1 times [2024-06-27 21:17:13,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:13,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750924298] [2024-06-27 21:17:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:16,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:16,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750924298] [2024-06-27 21:17:16,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750924298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:16,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:16,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:16,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131065921] [2024-06-27 21:17:16,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:16,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:17:16,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 239 transitions, 2715 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:16,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:16,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:17:16,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:19,151 INFO L124 PetriNetUnfolderBase]: 9022/12793 cut-off events. [2024-06-27 21:17:19,152 INFO L125 PetriNetUnfolderBase]: For 279406/279410 co-relation queries the response was YES. [2024-06-27 21:17:19,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79113 conditions, 12793 events. 9022/12793 cut-off events. For 279406/279410 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 70412 event pairs, 3222 based on Foata normal form. 18/12806 useless extension candidates. Maximal degree in co-relation 79043. Up to 12296 conditions per place. [2024-06-27 21:17:19,280 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-27 21:17:19,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 277 transitions, 3491 flow [2024-06-27 21:17:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:17:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:17:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 21:17:19,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2024-06-27 21:17:19,282 INFO L175 Difference]: Start difference. First operand has 153 places, 239 transitions, 2715 flow. Second operand 6 states and 145 transitions. [2024-06-27 21:17:19,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 277 transitions, 3491 flow [2024-06-27 21:17:19,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 277 transitions, 3421 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:19,740 INFO L231 Difference]: Finished difference. Result has 154 places, 242 transitions, 2764 flow [2024-06-27 21:17:19,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2764, PETRI_PLACES=154, PETRI_TRANSITIONS=242} [2024-06-27 21:17:19,740 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-27 21:17:19,740 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 242 transitions, 2764 flow [2024-06-27 21:17:19,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:19,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:19,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:19,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:17:19,741 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:19,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash 954697417, now seen corresponding path program 1 times [2024-06-27 21:17:19,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:19,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919153492] [2024-06-27 21:17:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:19,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:22,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:22,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919153492] [2024-06-27 21:17:22,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919153492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:22,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:22,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:22,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592961180] [2024-06-27 21:17:22,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:22,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:22,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:22,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:22,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:17:22,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 242 transitions, 2764 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:22,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:22,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:17:22,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:26,392 INFO L124 PetriNetUnfolderBase]: 9870/13940 cut-off events. [2024-06-27 21:17:26,393 INFO L125 PetriNetUnfolderBase]: For 329843/329865 co-relation queries the response was YES. [2024-06-27 21:17:26,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88101 conditions, 13940 events. 9870/13940 cut-off events. For 329843/329865 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 77364 event pairs, 3090 based on Foata normal form. 38/13971 useless extension candidates. Maximal degree in co-relation 88030. Up to 11984 conditions per place. [2024-06-27 21:17:26,530 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 225 selfloop transitions, 117 changer transitions 0/348 dead transitions. [2024-06-27 21:17:26,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 348 transitions, 4513 flow [2024-06-27 21:17:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:17:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:17:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-06-27 21:17:26,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2024-06-27 21:17:26,533 INFO L175 Difference]: Start difference. First operand has 154 places, 242 transitions, 2764 flow. Second operand 11 states and 276 transitions. [2024-06-27 21:17:26,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 348 transitions, 4513 flow [2024-06-27 21:17:27,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 348 transitions, 4430 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:17:27,020 INFO L231 Difference]: Finished difference. Result has 164 places, 265 transitions, 3281 flow [2024-06-27 21:17:27,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3281, PETRI_PLACES=164, PETRI_TRANSITIONS=265} [2024-06-27 21:17:27,022 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-27 21:17:27,023 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 265 transitions, 3281 flow [2024-06-27 21:17:27,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:27,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:27,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:27,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:17:27,023 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:27,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1109929915, now seen corresponding path program 1 times [2024-06-27 21:17:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:27,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786866153] [2024-06-27 21:17:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:30,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:30,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786866153] [2024-06-27 21:17:30,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786866153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:30,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:30,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:30,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291637958] [2024-06-27 21:17:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:30,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:30,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:30,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:30,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:17:30,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 265 transitions, 3281 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:30,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:30,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:17:30,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:33,309 INFO L124 PetriNetUnfolderBase]: 9934/14023 cut-off events. [2024-06-27 21:17:33,310 INFO L125 PetriNetUnfolderBase]: For 368964/368974 co-relation queries the response was YES. [2024-06-27 21:17:33,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94902 conditions, 14023 events. 9934/14023 cut-off events. For 368964/368974 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 77746 event pairs, 3201 based on Foata normal form. 12/14030 useless extension candidates. Maximal degree in co-relation 94827. Up to 13095 conditions per place. [2024-06-27 21:17:33,465 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 225 selfloop transitions, 91 changer transitions 0/322 dead transitions. [2024-06-27 21:17:33,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 322 transitions, 4481 flow [2024-06-27 21:17:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 21:17:33,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-27 21:17:33,467 INFO L175 Difference]: Start difference. First operand has 164 places, 265 transitions, 3281 flow. Second operand 7 states and 174 transitions. [2024-06-27 21:17:33,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 322 transitions, 4481 flow [2024-06-27 21:17:33,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 322 transitions, 4221 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:33,973 INFO L231 Difference]: Finished difference. Result has 167 places, 277 transitions, 3478 flow [2024-06-27 21:17:33,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3478, PETRI_PLACES=167, PETRI_TRANSITIONS=277} [2024-06-27 21:17:33,974 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-27 21:17:33,974 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 277 transitions, 3478 flow [2024-06-27 21:17:33,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:33,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:33,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:33,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:17:33,975 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:33,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1105168315, now seen corresponding path program 2 times [2024-06-27 21:17:33,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:33,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944543519] [2024-06-27 21:17:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:37,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:37,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944543519] [2024-06-27 21:17:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944543519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:37,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:37,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605251385] [2024-06-27 21:17:37,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:37,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:37,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:17:37,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 277 transitions, 3478 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:37,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:37,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:17:37,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:41,146 INFO L124 PetriNetUnfolderBase]: 9915/14009 cut-off events. [2024-06-27 21:17:41,146 INFO L125 PetriNetUnfolderBase]: For 381648/381660 co-relation queries the response was YES. [2024-06-27 21:17:41,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94756 conditions, 14009 events. 9915/14009 cut-off events. For 381648/381660 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 77712 event pairs, 3154 based on Foata normal form. 16/14022 useless extension candidates. Maximal degree in co-relation 94678. Up to 13523 conditions per place. [2024-06-27 21:17:41,284 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 281 selfloop transitions, 33 changer transitions 0/320 dead transitions. [2024-06-27 21:17:41,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 320 transitions, 4235 flow [2024-06-27 21:17:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 21:17:41,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2024-06-27 21:17:41,287 INFO L175 Difference]: Start difference. First operand has 167 places, 277 transitions, 3478 flow. Second operand 8 states and 181 transitions. [2024-06-27 21:17:41,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 320 transitions, 4235 flow [2024-06-27 21:17:41,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 320 transitions, 4064 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:41,793 INFO L231 Difference]: Finished difference. Result has 172 places, 277 transitions, 3384 flow [2024-06-27 21:17:41,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3384, PETRI_PLACES=172, PETRI_TRANSITIONS=277} [2024-06-27 21:17:41,793 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-27 21:17:41,794 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 277 transitions, 3384 flow [2024-06-27 21:17:41,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:41,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:41,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:41,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:17:41,794 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:41,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -19479595, now seen corresponding path program 2 times [2024-06-27 21:17:41,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:41,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635416789] [2024-06-27 21:17:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:41,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:45,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:45,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635416789] [2024-06-27 21:17:45,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635416789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:45,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:45,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:45,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716729941] [2024-06-27 21:17:45,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:45,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:45,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:17:45,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 277 transitions, 3384 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:45,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:45,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:17:45,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:48,832 INFO L124 PetriNetUnfolderBase]: 10543/14855 cut-off events. [2024-06-27 21:17:48,833 INFO L125 PetriNetUnfolderBase]: For 428249/428261 co-relation queries the response was YES. [2024-06-27 21:17:48,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100972 conditions, 14855 events. 10543/14855 cut-off events. For 428249/428261 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 82519 event pairs, 3174 based on Foata normal form. 28/14880 useless extension candidates. Maximal degree in co-relation 100893. Up to 13640 conditions per place. [2024-06-27 21:17:48,994 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 301 selfloop transitions, 64 changer transitions 0/371 dead transitions. [2024-06-27 21:17:48,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 371 transitions, 4967 flow [2024-06-27 21:17:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:17:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:17:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-06-27 21:17:49,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632867132867133 [2024-06-27 21:17:49,009 INFO L175 Difference]: Start difference. First operand has 172 places, 277 transitions, 3384 flow. Second operand 11 states and 265 transitions. [2024-06-27 21:17:49,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 371 transitions, 4967 flow [2024-06-27 21:17:49,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 371 transitions, 4901 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:17:49,590 INFO L231 Difference]: Finished difference. Result has 178 places, 294 transitions, 3728 flow [2024-06-27 21:17:49,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3728, PETRI_PLACES=178, PETRI_TRANSITIONS=294} [2024-06-27 21:17:49,591 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-27 21:17:49,591 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 294 transitions, 3728 flow [2024-06-27 21:17:49,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:49,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:49,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:49,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:17:49,591 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:49,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash -923248803, now seen corresponding path program 3 times [2024-06-27 21:17:49,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:49,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080165210] [2024-06-27 21:17:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:49,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:52,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080165210] [2024-06-27 21:17:52,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080165210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:52,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:52,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938836233] [2024-06-27 21:17:52,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:52,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:53,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:17:53,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 294 transitions, 3728 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:53,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:53,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:17:53,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:57,030 INFO L124 PetriNetUnfolderBase]: 10693/15089 cut-off events. [2024-06-27 21:17:57,031 INFO L125 PetriNetUnfolderBase]: For 462259/462271 co-relation queries the response was YES. [2024-06-27 21:17:57,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105448 conditions, 15089 events. 10693/15089 cut-off events. For 462259/462271 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 84219 event pairs, 3146 based on Foata normal form. 28/15114 useless extension candidates. Maximal degree in co-relation 105366. Up to 13754 conditions per place. [2024-06-27 21:17:57,197 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 302 selfloop transitions, 75 changer transitions 0/383 dead transitions. [2024-06-27 21:17:57,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 383 transitions, 5219 flow [2024-06-27 21:17:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:17:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:17:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-27 21:17:57,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-27 21:17:57,199 INFO L175 Difference]: Start difference. First operand has 178 places, 294 transitions, 3728 flow. Second operand 12 states and 282 transitions. [2024-06-27 21:17:57,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 383 transitions, 5219 flow [2024-06-27 21:17:57,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 383 transitions, 5093 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:57,911 INFO L231 Difference]: Finished difference. Result has 186 places, 307 transitions, 4052 flow [2024-06-27 21:17:57,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4052, PETRI_PLACES=186, PETRI_TRANSITIONS=307} [2024-06-27 21:17:57,912 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-27 21:17:57,912 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 307 transitions, 4052 flow [2024-06-27 21:17:57,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:57,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:57,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:57,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:17:57,912 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)] === [2024-06-27 21:17:57,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash -966039385, now seen corresponding path program 3 times [2024-06-27 21:17:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:57,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522376274] [2024-06-27 21:17:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:00,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:00,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522376274] [2024-06-27 21:18:00,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522376274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:00,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:00,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:18:00,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888977148] [2024-06-27 21:18:00,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:00,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:18:00,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:00,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:18:00,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:18:00,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:18:00,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 307 transitions, 4052 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:00,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:00,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:18:00,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:04,847 INFO L124 PetriNetUnfolderBase]: 10712/15088 cut-off events. [2024-06-27 21:18:04,847 INFO L125 PetriNetUnfolderBase]: For 493103/493150 co-relation queries the response was YES. [2024-06-27 21:18:04,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108244 conditions, 15088 events. 10712/15088 cut-off events. For 493103/493150 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 83969 event pairs, 3364 based on Foata normal form. 24/15098 useless extension candidates. Maximal degree in co-relation 108158. Up to 14096 conditions per place. [2024-06-27 21:18:04,990 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 252 selfloop transitions, 98 changer transitions 0/356 dead transitions. [2024-06-27 21:18:04,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 356 transitions, 5320 flow [2024-06-27 21:18:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:18:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:18:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 21:18:04,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-27 21:18:04,992 INFO L175 Difference]: Start difference. First operand has 186 places, 307 transitions, 4052 flow. Second operand 7 states and 172 transitions. [2024-06-27 21:18:04,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 356 transitions, 5320 flow [2024-06-27 21:18:05,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 356 transitions, 5152 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:05,736 INFO L231 Difference]: Finished difference. Result has 187 places, 311 transitions, 4166 flow [2024-06-27 21:18:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4166, PETRI_PLACES=187, PETRI_TRANSITIONS=311} [2024-06-27 21:18:05,737 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-27 21:18:05,737 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 311 transitions, 4166 flow [2024-06-27 21:18:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:05,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:05,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:18:05,738 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)] === [2024-06-27 21:18:05,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash 96655429, now seen corresponding path program 4 times [2024-06-27 21:18:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200805388] [2024-06-27 21:18:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:08,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200805388] [2024-06-27 21:18:08,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200805388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:08,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:08,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:18:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353111611] [2024-06-27 21:18:08,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:08,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:18:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:18:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:18:08,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:18:08,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 311 transitions, 4166 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:08,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:08,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:18:08,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:12,134 INFO L124 PetriNetUnfolderBase]: 10705/15101 cut-off events. [2024-06-27 21:18:12,134 INFO L125 PetriNetUnfolderBase]: For 510047/510086 co-relation queries the response was YES. [2024-06-27 21:18:12,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108449 conditions, 15101 events. 10705/15101 cut-off events. For 510047/510086 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 84305 event pairs, 3388 based on Foata normal form. 20/15107 useless extension candidates. Maximal degree in co-relation 108361. Up to 14091 conditions per place. [2024-06-27 21:18:12,294 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 244 selfloop transitions, 99 changer transitions 0/349 dead transitions. [2024-06-27 21:18:12,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 349 transitions, 5210 flow [2024-06-27 21:18:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:18:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:18:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 21:18:12,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-27 21:18:12,296 INFO L175 Difference]: Start difference. First operand has 187 places, 311 transitions, 4166 flow. Second operand 7 states and 167 transitions. [2024-06-27 21:18:12,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 349 transitions, 5210 flow [2024-06-27 21:18:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 349 transitions, 4820 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 21:18:13,037 INFO L231 Difference]: Finished difference. Result has 187 places, 311 transitions, 3983 flow [2024-06-27 21:18:13,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3983, PETRI_PLACES=187, PETRI_TRANSITIONS=311} [2024-06-27 21:18:13,038 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-27 21:18:13,038 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 311 transitions, 3983 flow [2024-06-27 21:18:13,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:13,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:13,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:13,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:18:13,039 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)] === [2024-06-27 21:18:13,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1141316903, now seen corresponding path program 5 times [2024-06-27 21:18:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:13,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883638120] [2024-06-27 21:18:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:13,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:15,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:15,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883638120] [2024-06-27 21:18:15,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883638120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:15,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:15,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:18:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430754766] [2024-06-27 21:18:15,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:18:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:15,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:18:15,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:18:15,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:18:15,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 311 transitions, 3983 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:15,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:15,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:18:15,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:19,732 INFO L124 PetriNetUnfolderBase]: 10698/15101 cut-off events. [2024-06-27 21:18:19,733 INFO L125 PetriNetUnfolderBase]: For 526134/526197 co-relation queries the response was YES. [2024-06-27 21:18:19,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108546 conditions, 15101 events. 10698/15101 cut-off events. For 526134/526197 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 84357 event pairs, 3306 based on Foata normal form. 51/15145 useless extension candidates. Maximal degree in co-relation 108458. Up to 14231 conditions per place. [2024-06-27 21:18:19,905 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 280 selfloop transitions, 76 changer transitions 0/362 dead transitions. [2024-06-27 21:18:19,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 362 transitions, 4982 flow [2024-06-27 21:18:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:18:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:18:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 21:18:19,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 21:18:19,908 INFO L175 Difference]: Start difference. First operand has 187 places, 311 transitions, 3983 flow. Second operand 7 states and 176 transitions. [2024-06-27 21:18:19,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 362 transitions, 4982 flow [2024-06-27 21:18:20,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 362 transitions, 4711 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:20,679 INFO L231 Difference]: Finished difference. Result has 189 places, 311 transitions, 3881 flow [2024-06-27 21:18:20,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3881, PETRI_PLACES=189, PETRI_TRANSITIONS=311} [2024-06-27 21:18:20,679 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-06-27 21:18:20,679 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 311 transitions, 3881 flow [2024-06-27 21:18:20,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:20,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:20,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:20,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:18:20,680 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)] === [2024-06-27 21:18:20,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1523481803, now seen corresponding path program 6 times [2024-06-27 21:18:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:20,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118185888] [2024-06-27 21:18:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:20,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:23,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:23,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118185888] [2024-06-27 21:18:23,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118185888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:23,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:23,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:18:23,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114958174] [2024-06-27 21:18:23,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:23,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:18:23,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:18:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:18:23,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:18:23,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 311 transitions, 3881 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:23,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:23,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:18:23,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:28,050 INFO L124 PetriNetUnfolderBase]: 10679/15055 cut-off events. [2024-06-27 21:18:28,050 INFO L125 PetriNetUnfolderBase]: For 549055/549067 co-relation queries the response was YES. [2024-06-27 21:18:28,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108769 conditions, 15055 events. 10679/15055 cut-off events. For 549055/549067 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 83915 event pairs, 3265 based on Foata normal form. 16/15068 useless extension candidates. Maximal degree in co-relation 108680. Up to 14212 conditions per place. [2024-06-27 21:18:28,226 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 289 selfloop transitions, 76 changer transitions 0/371 dead transitions. [2024-06-27 21:18:28,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 371 transitions, 4794 flow [2024-06-27 21:18:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 21:18:28,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831730769230769 [2024-06-27 21:18:28,232 INFO L175 Difference]: Start difference. First operand has 189 places, 311 transitions, 3881 flow. Second operand 8 states and 201 transitions. [2024-06-27 21:18:28,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 371 transitions, 4794 flow [2024-06-27 21:18:29,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 371 transitions, 4630 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:29,198 INFO L231 Difference]: Finished difference. Result has 191 places, 311 transitions, 3898 flow [2024-06-27 21:18:29,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3898, PETRI_PLACES=191, PETRI_TRANSITIONS=311} [2024-06-27 21:18:29,199 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-27 21:18:29,199 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 311 transitions, 3898 flow [2024-06-27 21:18:29,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:29,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:29,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:29,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:18:29,200 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:18:29,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1135599325, now seen corresponding path program 4 times [2024-06-27 21:18:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:29,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081415879] [2024-06-27 21:18:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081415879] [2024-06-27 21:18:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081415879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:32,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:32,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:32,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057148131] [2024-06-27 21:18:32,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:32,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:32,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:32,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:18:32,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 311 transitions, 3898 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:32,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:32,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:18:32,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:37,295 INFO L124 PetriNetUnfolderBase]: 11587/16348 cut-off events. [2024-06-27 21:18:37,295 INFO L125 PetriNetUnfolderBase]: For 589595/589607 co-relation queries the response was YES. [2024-06-27 21:18:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118371 conditions, 16348 events. 11587/16348 cut-off events. For 589595/589607 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 92406 event pairs, 3312 based on Foata normal form. 28/16373 useless extension candidates. Maximal degree in co-relation 118282. Up to 14011 conditions per place. [2024-06-27 21:18:37,465 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 306 selfloop transitions, 137 changer transitions 0/449 dead transitions. [2024-06-27 21:18:37,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 449 transitions, 6127 flow [2024-06-27 21:18:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:18:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:18:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 278 transitions. [2024-06-27 21:18:37,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486013986013986 [2024-06-27 21:18:37,484 INFO L175 Difference]: Start difference. First operand has 191 places, 311 transitions, 3898 flow. Second operand 11 states and 278 transitions. [2024-06-27 21:18:37,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 449 transitions, 6127 flow [2024-06-27 21:18:38,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 449 transitions, 5885 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 21:18:38,349 INFO L231 Difference]: Finished difference. Result has 194 places, 357 transitions, 4785 flow [2024-06-27 21:18:38,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3672, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4785, PETRI_PLACES=194, PETRI_TRANSITIONS=357} [2024-06-27 21:18:38,349 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-27 21:18:38,349 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 357 transitions, 4785 flow [2024-06-27 21:18:38,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:38,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:38,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:38,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:18:38,350 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:18:38,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1135609555, now seen corresponding path program 5 times [2024-06-27 21:18:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:38,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311878255] [2024-06-27 21:18:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:41,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:41,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311878255] [2024-06-27 21:18:41,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311878255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:41,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:41,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:41,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178327999] [2024-06-27 21:18:41,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:41,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:41,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:41,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:18:41,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 357 transitions, 4785 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:41,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:41,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:18:41,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand