./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.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/mutex-meet-nonrel/safe016_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe016_rmo.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-eb4cb34-m [2024-06-21 21:52:38,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:52:38,823 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:52:38,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:52:38,832 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:52:38,856 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:52:38,857 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:52:38,857 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:52:38,858 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:52:38,860 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:52:38,861 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:52:38,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:52:38,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:52:38,863 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:52:38,863 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:52:38,863 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:52:38,863 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:52:38,864 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:52:38,864 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:52:38,864 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:52:38,865 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:52:38,865 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:52:38,865 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:52:38,866 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:52:38,866 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:52:38,866 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:52:38,866 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:52:38,866 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:52:38,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:52:38,867 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:52:38,868 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:52:38,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:52:38,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:52:38,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:52:38,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:52:38,869 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:52:38,869 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:52:38,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:52:38,869 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:52:38,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:52:38,869 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:52:38,870 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:52:38,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:52:38,870 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:52:39,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:52:39,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:52:39,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:52:39,112 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:52:39,113 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:52:39,113 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2024-06-21 21:52:40,100 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:52:40,296 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:52:40,300 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2024-06-21 21:52:40,312 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e095d44b/c24312053c5442ee8443ab17792b5ad5/FLAG0d86a43d1 [2024-06-21 21:52:40,322 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e095d44b/c24312053c5442ee8443ab17792b5ad5 [2024-06-21 21:52:40,324 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:52:40,327 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:52:40,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe016_rmo.oepc.yml/witness.yml [2024-06-21 21:52:40,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:52:40,530 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:52:40,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:52:40,531 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:52:40,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:52:40,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:52:40" (1/2) ... [2024-06-21 21:52:40,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8074a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:52:40, skipping insertion in model container [2024-06-21 21:52:40,536 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:52:40" (1/2) ... [2024-06-21 21:52:40,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a8f4f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:52:40, skipping insertion in model container [2024-06-21 21:52:40,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:52:40" (2/2) ... [2024-06-21 21:52:40,538 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8074a4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:40, skipping insertion in model container [2024-06-21 21:52:40,538 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:52:40" (2/2) ... [2024-06-21 21:52:40,538 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:52:40,680 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:52:40,681 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$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 || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$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)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0) [2024-06-21 21:52:40,681 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_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$read_delayed_var == 2))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__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$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0) [2024-06-21 21:52:40,682 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$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 || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$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)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0) [2024-06-21 21:52:40,682 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_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$read_delayed_var == 2))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__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$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0) [2024-06-21 21:52:40,682 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:52:40,683 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-21 21:52:40,720 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:52:40,978 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:52:40,990 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:52:41,139 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:52:41,181 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:52:41,182 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41 WrapperNode [2024-06-21 21:52:41,182 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:52:41,183 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:52:41,183 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:52:41,183 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:52:41,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,259 INFO L138 Inliner]: procedures = 176, calls = 118, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 331 [2024-06-21 21:52:41,262 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:52:41,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:52:41,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:52:41,263 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:52:41,271 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,275 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,295 INFO L175 MemorySlicer]: Split 72 memory accesses to 2 slices as follows [2, 70]. 97 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]. [2024-06-21 21:52:41,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,326 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,328 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:52:41,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:52:41,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:52:41,347 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:52:41,348 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (1/1) ... [2024-06-21 21:52:41,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:52:41,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:52:41,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:52:41,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:52:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:52:41,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:52:41,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:52:41,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:52:41,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:52:41,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:52:41,405 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:52:41,405 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:52:41,405 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:52:41,405 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:52:41,405 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:52:41,405 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:52:41,405 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:52:41,406 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:52:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:52:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:52:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:52:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:52:41,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:52:41,409 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:52:41,537 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:52:41,539 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:52:42,067 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:52:42,067 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:52:42,540 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:52:42,540 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:52:42,542 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:52:42 BoogieIcfgContainer [2024-06-21 21:52:42,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:52:42,543 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:52:42,543 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:52:42,546 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:52:42,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:52:40" (1/4) ... [2024-06-21 21:52:42,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118dcb61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:52:42, skipping insertion in model container [2024-06-21 21:52:42,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:52:40" (2/4) ... [2024-06-21 21:52:42,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118dcb61 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:52:42, skipping insertion in model container [2024-06-21 21:52:42,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:52:41" (3/4) ... [2024-06-21 21:52:42,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118dcb61 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:52:42, skipping insertion in model container [2024-06-21 21:52:42,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:52:42" (4/4) ... [2024-06-21 21:52:42,551 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.oepc.i [2024-06-21 21:52:42,565 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:52:42,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:52:42,565 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:52:42,621 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:52:42,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 21:52:42,680 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 21:52:42,680 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:52:42,683 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. [2024-06-21 21:52:42,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 21:52:42,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 21:52:42,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:52:42,740 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;@585eb956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:52:42,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:52:42,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:52:42,744 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:52:42,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:52:42,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:42,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:52:42,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:52:42,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:42,756 INFO L85 PathProgramCache]: Analyzing trace with hash 929216941, now seen corresponding path program 1 times [2024-06-21 21:52:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274683083] [2024-06-21 21:52:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:42,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:44,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:44,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274683083] [2024-06-21 21:52:44,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274683083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:44,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:44,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:52:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406102876] [2024-06-21 21:52:44,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:44,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:52:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:44,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:52:44,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:52:44,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 21:52:44,977 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) [2024-06-21 21:52:44,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:44,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 21:52:44,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:46,293 INFO L124 PetriNetUnfolderBase]: 5566/7763 cut-off events. [2024-06-21 21:52:46,294 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-21 21:52:46,307 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 40429 event pairs, 4068 based on Foata normal form. 1/7635 useless extension candidates. Maximal degree in co-relation 15696. Up to 7674 conditions per place. [2024-06-21 21:52:46,338 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 46 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-21 21:52:46,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 241 flow [2024-06-21 21:52:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:52:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:52:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-06-21 21:52:46,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 21:52:46,349 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 91 transitions. [2024-06-21 21:52:46,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 241 flow [2024-06-21 21:52:46,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:52:46,356 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 21:52:46,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 21:52:46,360 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 21:52:46,361 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 21:52:46,361 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) [2024-06-21 21:52:46,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:46,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:46,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:52:46,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:52:46,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash -375678516, now seen corresponding path program 1 times [2024-06-21 21:52:46,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:46,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868447073] [2024-06-21 21:52:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:48,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868447073] [2024-06-21 21:52:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868447073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:48,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:48,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:52:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637945206] [2024-06-21 21:52:48,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:48,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:52:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:52:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:52:48,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 21:52:48,813 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) [2024-06-21 21:52:48,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:48,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 21:52:48,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:50,300 INFO L124 PetriNetUnfolderBase]: 5556/7744 cut-off events. [2024-06-21 21:52:50,300 INFO L125 PetriNetUnfolderBase]: For 1504/1514 co-relation queries the response was YES. [2024-06-21 21:52:50,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17958 conditions, 7744 events. 5556/7744 cut-off events. For 1504/1514 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40112 event pairs, 3547 based on Foata normal form. 7/7746 useless extension candidates. Maximal degree in co-relation 17946. Up to 7633 conditions per place. [2024-06-21 21:52:50,336 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-21 21:52:50,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 345 flow [2024-06-21 21:52:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:52:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:52:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-21 21:52:50,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 21:52:50,338 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 120 transitions. [2024-06-21 21:52:50,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 345 flow [2024-06-21 21:52:50,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:52:50,340 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 21:52:50,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 21:52:50,341 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 21:52:50,341 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 21:52:50,341 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) [2024-06-21 21:52:50,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:50,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:50,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:52:50,342 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:52:50,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1238869164, now seen corresponding path program 1 times [2024-06-21 21:52:50,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:50,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970279944] [2024-06-21 21:52:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:50,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:52,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:52,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970279944] [2024-06-21 21:52:52,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970279944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:52,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:52,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:52:52,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768744434] [2024-06-21 21:52:52,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:52,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:52:52,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:52,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:52:52,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:52:52,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 21:52:52,787 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) [2024-06-21 21:52:52,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:52,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 21:52:52,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:54,730 INFO L124 PetriNetUnfolderBase]: 6725/9323 cut-off events. [2024-06-21 21:52:54,730 INFO L125 PetriNetUnfolderBase]: For 4925/4925 co-relation queries the response was YES. [2024-06-21 21:52:54,740 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 48145 event pairs, 3191 based on Foata normal form. 7/9323 useless extension candidates. Maximal degree in co-relation 24114. Up to 9079 conditions per place. [2024-06-21 21:52:54,771 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 89 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2024-06-21 21:52:54,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 115 transitions, 613 flow [2024-06-21 21:52:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:52:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:52:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-21 21:52:54,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 21:52:54,774 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 155 transitions. [2024-06-21 21:52:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 115 transitions, 613 flow [2024-06-21 21:52:54,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 115 transitions, 582 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 21:52:54,778 INFO L231 Difference]: Finished difference. Result has 62 places, 68 transitions, 318 flow [2024-06-21 21:52:54,778 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} [2024-06-21 21:52:54,779 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-21 21:52:54,779 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 68 transitions, 318 flow [2024-06-21 21:52:54,779 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) [2024-06-21 21:52:54,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:54,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:54,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:52:54,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:52:54,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1705647223, now seen corresponding path program 1 times [2024-06-21 21:52:54,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:54,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334411332] [2024-06-21 21:52:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:54,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:57,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:57,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334411332] [2024-06-21 21:52:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334411332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:57,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:57,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:52:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694747310] [2024-06-21 21:52:57,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:52:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:52:57,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:52:57,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 21:52:57,539 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) [2024-06-21 21:52:57,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:57,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 21:52:57,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:59,325 INFO L124 PetriNetUnfolderBase]: 6895/9589 cut-off events. [2024-06-21 21:52:59,326 INFO L125 PetriNetUnfolderBase]: For 11767/11767 co-relation queries the response was YES. [2024-06-21 21:52:59,335 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 50008 event pairs, 2460 based on Foata normal form. 32/9614 useless extension candidates. Maximal degree in co-relation 29159. Up to 9063 conditions per place. [2024-06-21 21:52:59,364 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 101 selfloop transitions, 22 changer transitions 0/130 dead transitions. [2024-06-21 21:52:59,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 130 transitions, 762 flow [2024-06-21 21:52:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:52:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:52:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-21 21:52:59,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-21 21:52:59,366 INFO L175 Difference]: Start difference. First operand has 62 places, 68 transitions, 318 flow. Second operand 6 states and 181 transitions. [2024-06-21 21:52:59,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 130 transitions, 762 flow [2024-06-21 21:52:59,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 130 transitions, 754 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 21:52:59,372 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 383 flow [2024-06-21 21:52:59,372 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} [2024-06-21 21:52:59,373 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-21 21:52:59,373 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 383 flow [2024-06-21 21:52:59,373 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) [2024-06-21 21:52:59,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:59,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:59,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:52:59,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:52:59,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:59,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1778942057, now seen corresponding path program 1 times [2024-06-21 21:52:59,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:59,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682991626] [2024-06-21 21:52:59,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:59,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682991626] [2024-06-21 21:53:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682991626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:00,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:00,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:53:00,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270560663] [2024-06-21 21:53:00,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:00,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:53:00,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:00,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:53:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:53:00,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:00,780 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) [2024-06-21 21:53:00,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:00,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:00,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:02,441 INFO L124 PetriNetUnfolderBase]: 6886/9584 cut-off events. [2024-06-21 21:53:02,441 INFO L125 PetriNetUnfolderBase]: For 16914/16914 co-relation queries the response was YES. [2024-06-21 21:53:02,455 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 49971 event pairs, 3060 based on Foata normal form. 3/9583 useless extension candidates. Maximal degree in co-relation 31471. Up to 9469 conditions per place. [2024-06-21 21:53:02,490 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 78 selfloop transitions, 10 changer transitions 0/94 dead transitions. [2024-06-21 21:53:02,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 624 flow [2024-06-21 21:53:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:53:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:53:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 21:53:02,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 21:53:02,497 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 383 flow. Second operand 5 states and 118 transitions. [2024-06-21 21:53:02,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 624 flow [2024-06-21 21:53:02,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 571 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:53:02,507 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 379 flow [2024-06-21 21:53:02,507 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} [2024-06-21 21:53:02,509 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-21 21:53:02,510 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 379 flow [2024-06-21 21:53:02,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:02,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:02,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:02,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:53:02,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:02,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash -955614810, now seen corresponding path program 1 times [2024-06-21 21:53:02,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:02,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826684380] [2024-06-21 21:53:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:02,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:05,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826684380] [2024-06-21 21:53:05,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826684380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:05,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:05,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:05,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579471094] [2024-06-21 21:53:05,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:05,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:05,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:05,326 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) [2024-06-21 21:53:05,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:05,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:05,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:07,295 INFO L124 PetriNetUnfolderBase]: 6904/9602 cut-off events. [2024-06-21 21:53:07,295 INFO L125 PetriNetUnfolderBase]: For 19735/19735 co-relation queries the response was YES. [2024-06-21 21:53:07,311 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 50005 event pairs, 3051 based on Foata normal form. 6/9601 useless extension candidates. Maximal degree in co-relation 31980. Up to 9348 conditions per place. [2024-06-21 21:53:07,345 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 85 selfloop transitions, 24 changer transitions 0/115 dead transitions. [2024-06-21 21:53:07,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 115 transitions, 750 flow [2024-06-21 21:53:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 21:53:07,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 21:53:07,348 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 379 flow. Second operand 6 states and 152 transitions. [2024-06-21 21:53:07,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 115 transitions, 750 flow [2024-06-21 21:53:07,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 728 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 21:53:07,360 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 466 flow [2024-06-21 21:53:07,360 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} [2024-06-21 21:53:07,362 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 21:53:07,362 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 466 flow [2024-06-21 21:53:07,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:07,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:07,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:07,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:53:07,363 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:07,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash 166367880, now seen corresponding path program 2 times [2024-06-21 21:53:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:07,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284667251] [2024-06-21 21:53:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:09,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:09,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284667251] [2024-06-21 21:53:09,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284667251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:09,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:09,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:09,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917637598] [2024-06-21 21:53:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:09,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:09,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:09,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:09,527 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) [2024-06-21 21:53:09,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:09,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:09,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:11,373 INFO L124 PetriNetUnfolderBase]: 6859/9520 cut-off events. [2024-06-21 21:53:11,374 INFO L125 PetriNetUnfolderBase]: For 23934/23934 co-relation queries the response was YES. [2024-06-21 21:53:11,388 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 49284 event pairs, 3071 based on Foata normal form. 3/9510 useless extension candidates. Maximal degree in co-relation 32721. Up to 9279 conditions per place. [2024-06-21 21:53:11,419 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 77 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-21 21:53:11,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 756 flow [2024-06-21 21:53:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 21:53:11,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 21:53:11,421 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 466 flow. Second operand 6 states and 146 transitions. [2024-06-21 21:53:11,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 756 flow [2024-06-21 21:53:11,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 719 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:53:11,434 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 500 flow [2024-06-21 21:53:11,434 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} [2024-06-21 21:53:11,435 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 21:53:11,435 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 500 flow [2024-06-21 21:53:11,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:11,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:11,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:53:11,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:11,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash -949892954, now seen corresponding path program 1 times [2024-06-21 21:53:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:11,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082543561] [2024-06-21 21:53:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:13,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:13,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082543561] [2024-06-21 21:53:13,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082543561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:13,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:13,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:13,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302358901] [2024-06-21 21:53:13,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:13,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:13,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:13,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:13,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:13,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:13,231 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) [2024-06-21 21:53:13,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:13,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:13,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:14,991 INFO L124 PetriNetUnfolderBase]: 6844/9510 cut-off events. [2024-06-21 21:53:14,991 INFO L125 PetriNetUnfolderBase]: For 28023/28023 co-relation queries the response was YES. [2024-06-21 21:53:15,009 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 49232 event pairs, 2897 based on Foata normal form. 6/9512 useless extension candidates. Maximal degree in co-relation 33400. Up to 9360 conditions per place. [2024-06-21 21:53:15,042 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 94 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2024-06-21 21:53:15,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 814 flow [2024-06-21 21:53:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 21:53:15,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 21:53:15,044 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 500 flow. Second operand 6 states and 141 transitions. [2024-06-21 21:53:15,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 814 flow [2024-06-21 21:53:15,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 775 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 21:53:15,073 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 525 flow [2024-06-21 21:53:15,073 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} [2024-06-21 21:53:15,073 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 21:53:15,073 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 525 flow [2024-06-21 21:53:15,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:15,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:15,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:15,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:53:15,074 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:15,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1774019815, now seen corresponding path program 1 times [2024-06-21 21:53:15,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:15,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188985874] [2024-06-21 21:53:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:15,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:17,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:17,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188985874] [2024-06-21 21:53:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188985874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:17,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:17,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996072826] [2024-06-21 21:53:17,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:17,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:17,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:17,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:17,886 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) [2024-06-21 21:53:17,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:17,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:17,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:19,989 INFO L124 PetriNetUnfolderBase]: 7044/9813 cut-off events. [2024-06-21 21:53:19,989 INFO L125 PetriNetUnfolderBase]: For 36821/36821 co-relation queries the response was YES. [2024-06-21 21:53:20,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36154 conditions, 9813 events. 7044/9813 cut-off events. For 36821/36821 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51285 event pairs, 2962 based on Foata normal form. 30/9836 useless extension candidates. Maximal degree in co-relation 36125. Up to 9328 conditions per place. [2024-06-21 21:53:20,042 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2024-06-21 21:53:20,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 132 transitions, 923 flow [2024-06-21 21:53:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 21:53:20,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:53:20,044 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 525 flow. Second operand 7 states and 175 transitions. [2024-06-21 21:53:20,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 132 transitions, 923 flow [2024-06-21 21:53:20,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 132 transitions, 885 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:53:20,070 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 586 flow [2024-06-21 21:53:20,070 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} [2024-06-21 21:53:20,070 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-21 21:53:20,071 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 586 flow [2024-06-21 21:53:20,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:20,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:20,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:20,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:53:20,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:20,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash 965785575, now seen corresponding path program 2 times [2024-06-21 21:53:20,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:20,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139055061] [2024-06-21 21:53:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:20,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:22,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:22,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139055061] [2024-06-21 21:53:22,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139055061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:22,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:22,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:22,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112013797] [2024-06-21 21:53:22,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:22,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:22,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:22,709 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) [2024-06-21 21:53:22,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:22,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:22,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:24,679 INFO L124 PetriNetUnfolderBase]: 7088/9883 cut-off events. [2024-06-21 21:53:24,679 INFO L125 PetriNetUnfolderBase]: For 45030/45030 co-relation queries the response was YES. [2024-06-21 21:53:24,697 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 51410 event pairs, 3024 based on Foata normal form. 6/9876 useless extension candidates. Maximal degree in co-relation 38451. Up to 9584 conditions per place. [2024-06-21 21:53:24,729 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 93 selfloop transitions, 29 changer transitions 0/128 dead transitions. [2024-06-21 21:53:24,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 962 flow [2024-06-21 21:53:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 21:53:24,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:53:24,731 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 586 flow. Second operand 7 states and 169 transitions. [2024-06-21 21:53:24,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 962 flow [2024-06-21 21:53:24,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 895 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:53:24,762 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 625 flow [2024-06-21 21:53:24,762 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} [2024-06-21 21:53:24,763 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-21 21:53:24,763 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 625 flow [2024-06-21 21:53:24,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:24,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:24,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:24,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:53:24,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:24,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1980940165, now seen corresponding path program 3 times [2024-06-21 21:53:24,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:24,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81361256] [2024-06-21 21:53:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:24,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:27,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:27,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81361256] [2024-06-21 21:53:27,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81361256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:27,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:27,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:27,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395093251] [2024-06-21 21:53:27,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:27,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:27,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:27,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:27,416 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) [2024-06-21 21:53:27,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:27,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:27,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:29,483 INFO L124 PetriNetUnfolderBase]: 7073/9862 cut-off events. [2024-06-21 21:53:29,484 INFO L125 PetriNetUnfolderBase]: For 53912/53912 co-relation queries the response was YES. [2024-06-21 21:53:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39906 conditions, 9862 events. 7073/9862 cut-off events. For 53912/53912 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51216 event pairs, 2662 based on Foata normal form. 6/9855 useless extension candidates. Maximal degree in co-relation 39875. Up to 9247 conditions per place. [2024-06-21 21:53:29,534 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 92 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-06-21 21:53:29,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 1033 flow [2024-06-21 21:53:29,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 21:53:29,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-21 21:53:29,535 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 625 flow. Second operand 7 states and 173 transitions. [2024-06-21 21:53:29,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 1033 flow [2024-06-21 21:53:29,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 135 transitions, 953 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:53:29,561 INFO L231 Difference]: Finished difference. Result has 86 places, 90 transitions, 673 flow [2024-06-21 21:53:29,562 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} [2024-06-21 21:53:29,562 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 21:53:29,562 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 90 transitions, 673 flow [2024-06-21 21:53:29,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:29,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:29,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:29,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:53:29,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:29,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash -608793195, now seen corresponding path program 1 times [2024-06-21 21:53:29,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:29,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259640648] [2024-06-21 21:53:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:29,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259640648] [2024-06-21 21:53:31,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259640648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:31,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:31,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:31,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928998476] [2024-06-21 21:53:31,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:31,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:31,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:31,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:31,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:31,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:31,614 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) [2024-06-21 21:53:31,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:31,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:31,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:33,551 INFO L124 PetriNetUnfolderBase]: 7938/11199 cut-off events. [2024-06-21 21:53:33,551 INFO L125 PetriNetUnfolderBase]: For 70690/70690 co-relation queries the response was YES. [2024-06-21 21:53:33,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46913 conditions, 11199 events. 7938/11199 cut-off events. For 70690/70690 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 60310 event pairs, 3089 based on Foata normal form. 18/11208 useless extension candidates. Maximal degree in co-relation 46881. Up to 9939 conditions per place. [2024-06-21 21:53:33,607 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 133 selfloop transitions, 49 changer transitions 0/188 dead transitions. [2024-06-21 21:53:33,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 188 transitions, 1588 flow [2024-06-21 21:53:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:53:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:53:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 21:53:33,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:53:33,609 INFO L175 Difference]: Start difference. First operand has 86 places, 90 transitions, 673 flow. Second operand 8 states and 208 transitions. [2024-06-21 21:53:33,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 188 transitions, 1588 flow [2024-06-21 21:53:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 188 transitions, 1440 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:53:33,673 INFO L231 Difference]: Finished difference. Result has 91 places, 117 transitions, 955 flow [2024-06-21 21:53:33,673 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} [2024-06-21 21:53:33,675 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2024-06-21 21:53:33,675 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 117 transitions, 955 flow [2024-06-21 21:53:33,675 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) [2024-06-21 21:53:33,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:33,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:33,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:53:33,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:33,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:33,678 INFO L85 PathProgramCache]: Analyzing trace with hash 284165585, now seen corresponding path program 2 times [2024-06-21 21:53:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:33,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576694860] [2024-06-21 21:53:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:33,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:36,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:36,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576694860] [2024-06-21 21:53:36,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576694860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:36,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:36,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:36,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220923351] [2024-06-21 21:53:36,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:36,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:36,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:36,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:36,513 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) [2024-06-21 21:53:36,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:36,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:36,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:38,670 INFO L124 PetriNetUnfolderBase]: 8142/11527 cut-off events. [2024-06-21 21:53:38,671 INFO L125 PetriNetUnfolderBase]: For 88918/88920 co-relation queries the response was YES. [2024-06-21 21:53:38,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50482 conditions, 11527 events. 8142/11527 cut-off events. For 88918/88920 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 62995 event pairs, 2351 based on Foata normal form. 18/11536 useless extension candidates. Maximal degree in co-relation 50447. Up to 9394 conditions per place. [2024-06-21 21:53:38,731 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 111 selfloop transitions, 57 changer transitions 0/174 dead transitions. [2024-06-21 21:53:38,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 174 transitions, 1585 flow [2024-06-21 21:53:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 21:53:38,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49175824175824173 [2024-06-21 21:53:38,733 INFO L175 Difference]: Start difference. First operand has 91 places, 117 transitions, 955 flow. Second operand 7 states and 179 transitions. [2024-06-21 21:53:38,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 174 transitions, 1585 flow [2024-06-21 21:53:38,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1551 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 21:53:38,821 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1123 flow [2024-06-21 21:53:38,821 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} [2024-06-21 21:53:38,822 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-21 21:53:38,822 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1123 flow [2024-06-21 21:53:38,822 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) [2024-06-21 21:53:38,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:38,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:38,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:53:38,823 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:38,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 402498165, now seen corresponding path program 1 times [2024-06-21 21:53:38,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:38,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579384995] [2024-06-21 21:53:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:38,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:41,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:41,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579384995] [2024-06-21 21:53:41,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579384995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:41,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:41,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:41,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625715395] [2024-06-21 21:53:41,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:41,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:41,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:41,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:41,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:41,655 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) [2024-06-21 21:53:41,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:41,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:41,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:43,870 INFO L124 PetriNetUnfolderBase]: 8064/11433 cut-off events. [2024-06-21 21:53:43,870 INFO L125 PetriNetUnfolderBase]: For 101798/101800 co-relation queries the response was YES. [2024-06-21 21:53:43,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51538 conditions, 11433 events. 8064/11433 cut-off events. For 101798/101800 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 62413 event pairs, 2309 based on Foata normal form. 36/11460 useless extension candidates. Maximal degree in co-relation 51501. Up to 9358 conditions per place. [2024-06-21 21:53:43,929 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 108 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-21 21:53:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 171 transitions, 1597 flow [2024-06-21 21:53:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:53:43,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 21:53:43,931 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1123 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:53:43,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 171 transitions, 1597 flow [2024-06-21 21:53:44,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1498 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 21:53:44,082 INFO L231 Difference]: Finished difference. Result has 99 places, 121 transitions, 1150 flow [2024-06-21 21:53:44,082 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} [2024-06-21 21:53:44,082 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 21:53:44,082 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 121 transitions, 1150 flow [2024-06-21 21:53:44,083 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) [2024-06-21 21:53:44,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:44,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:44,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:53:44,083 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:44,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:44,083 INFO L85 PathProgramCache]: Analyzing trace with hash 110758265, now seen corresponding path program 2 times [2024-06-21 21:53:44,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:44,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116065969] [2024-06-21 21:53:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:44,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:46,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116065969] [2024-06-21 21:53:46,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116065969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:46,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:46,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:46,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273608562] [2024-06-21 21:53:46,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:46,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:46,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:46,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:46,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:46,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:46,774 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) [2024-06-21 21:53:46,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:46,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:46,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:48,987 INFO L124 PetriNetUnfolderBase]: 8025/11365 cut-off events. [2024-06-21 21:53:48,988 INFO L125 PetriNetUnfolderBase]: For 94312/94326 co-relation queries the response was YES. [2024-06-21 21:53:49,012 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 61910 event pairs, 1828 based on Foata normal form. 20/11348 useless extension candidates. Maximal degree in co-relation 50828. Up to 9071 conditions per place. [2024-06-21 21:53:49,051 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 99 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-21 21:53:49,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 166 transitions, 1604 flow [2024-06-21 21:53:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 21:53:49,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 21:53:49,053 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 1150 flow. Second operand 7 states and 168 transitions. [2024-06-21 21:53:49,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 166 transitions, 1604 flow [2024-06-21 21:53:49,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1444 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:53:49,130 INFO L231 Difference]: Finished difference. Result has 99 places, 122 transitions, 1131 flow [2024-06-21 21:53:49,130 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} [2024-06-21 21:53:49,131 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 21:53:49,131 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 122 transitions, 1131 flow [2024-06-21 21:53:49,131 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) [2024-06-21 21:53:49,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:49,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:49,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:53:49,131 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)] === [2024-06-21 21:53:49,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1741301532, now seen corresponding path program 1 times [2024-06-21 21:53:49,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:49,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669265365] [2024-06-21 21:53:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:49,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:51,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:51,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669265365] [2024-06-21 21:53:51,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669265365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:51,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:51,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:51,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012595477] [2024-06-21 21:53:51,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:51,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:51,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:51,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:51,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:51,037 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) [2024-06-21 21:53:51,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:51,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:51,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:53,093 INFO L124 PetriNetUnfolderBase]: 8051/11442 cut-off events. [2024-06-21 21:53:53,093 INFO L125 PetriNetUnfolderBase]: For 101022/101027 co-relation queries the response was YES. [2024-06-21 21:53:53,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51880 conditions, 11442 events. 8051/11442 cut-off events. For 101022/101027 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 62872 event pairs, 3276 based on Foata normal form. 10/11445 useless extension candidates. Maximal degree in co-relation 51841. Up to 11121 conditions per place. [2024-06-21 21:53:53,163 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 133 selfloop transitions, 17 changer transitions 0/156 dead transitions. [2024-06-21 21:53:53,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 156 transitions, 1611 flow [2024-06-21 21:53:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:53:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:53:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 21:53:53,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653846153846154 [2024-06-21 21:53:53,165 INFO L175 Difference]: Start difference. First operand has 99 places, 122 transitions, 1131 flow. Second operand 5 states and 121 transitions. [2024-06-21 21:53:53,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 156 transitions, 1611 flow [2024-06-21 21:53:53,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1464 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:53:53,292 INFO L231 Difference]: Finished difference. Result has 100 places, 132 transitions, 1125 flow [2024-06-21 21:53:53,292 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} [2024-06-21 21:53:53,292 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-21 21:53:53,293 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 132 transitions, 1125 flow [2024-06-21 21:53:53,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:53,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:53,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:53,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:53:53,293 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:53,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:53,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1858993146, now seen corresponding path program 1 times [2024-06-21 21:53:53,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:53,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948991817] [2024-06-21 21:53:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:53,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:55,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948991817] [2024-06-21 21:53:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948991817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:55,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:55,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:55,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063181095] [2024-06-21 21:53:55,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:55,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:55,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:55,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:55,129 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) [2024-06-21 21:53:55,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:55,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:55,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:57,321 INFO L124 PetriNetUnfolderBase]: 8070/11473 cut-off events. [2024-06-21 21:53:57,321 INFO L125 PetriNetUnfolderBase]: For 112778/112786 co-relation queries the response was YES. [2024-06-21 21:53:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54133 conditions, 11473 events. 8070/11473 cut-off events. For 112778/112786 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 63171 event pairs, 3261 based on Foata normal form. 6/11472 useless extension candidates. Maximal degree in co-relation 54092. Up to 11195 conditions per place. [2024-06-21 21:53:57,385 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 142 selfloop transitions, 21 changer transitions 0/169 dead transitions. [2024-06-21 21:53:57,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1685 flow [2024-06-21 21:53:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 21:53:57,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-21 21:53:57,387 INFO L175 Difference]: Start difference. First operand has 100 places, 132 transitions, 1125 flow. Second operand 6 states and 139 transitions. [2024-06-21 21:53:57,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1685 flow [2024-06-21 21:53:57,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 169 transitions, 1649 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 21:53:57,478 INFO L231 Difference]: Finished difference. Result has 105 places, 140 transitions, 1240 flow [2024-06-21 21:53:57,478 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} [2024-06-21 21:53:57,478 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-21 21:53:57,478 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 140 transitions, 1240 flow [2024-06-21 21:53:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:57,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:57,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:53:57,479 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:53:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1557222182, now seen corresponding path program 2 times [2024-06-21 21:53:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457829264] [2024-06-21 21:53:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:59,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:59,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457829264] [2024-06-21 21:53:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457829264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:59,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:59,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:59,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643390210] [2024-06-21 21:53:59,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:59,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:59,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:59,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:59,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:53:59,329 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) [2024-06-21 21:53:59,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:59,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:53:59,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:01,277 INFO L124 PetriNetUnfolderBase]: 8063/11464 cut-off events. [2024-06-21 21:54:01,277 INFO L125 PetriNetUnfolderBase]: For 127973/127981 co-relation queries the response was YES. [2024-06-21 21:54:01,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56376 conditions, 11464 events. 8063/11464 cut-off events. For 127973/127981 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 63011 event pairs, 3261 based on Foata normal form. 6/11463 useless extension candidates. Maximal degree in co-relation 56332. Up to 11199 conditions per place. [2024-06-21 21:54:01,350 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 139 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2024-06-21 21:54:01,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 162 transitions, 1616 flow [2024-06-21 21:54:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:54:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:54:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 21:54:01,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 21:54:01,352 INFO L175 Difference]: Start difference. First operand has 105 places, 140 transitions, 1240 flow. Second operand 5 states and 118 transitions. [2024-06-21 21:54:01,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 162 transitions, 1616 flow [2024-06-21 21:54:01,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 1538 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-21 21:54:01,522 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1210 flow [2024-06-21 21:54:01,522 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} [2024-06-21 21:54:01,522 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-21 21:54:01,522 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1210 flow [2024-06-21 21:54:01,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:01,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:01,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:01,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:54:01,523 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:01,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1971795098, now seen corresponding path program 1 times [2024-06-21 21:54:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395129240] [2024-06-21 21:54:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:04,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:04,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395129240] [2024-06-21 21:54:04,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395129240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:04,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:04,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884611813] [2024-06-21 21:54:04,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:04,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:04,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:04,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:04,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:04,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:04,836 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) [2024-06-21 21:54:04,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:04,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:04,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:07,299 INFO L124 PetriNetUnfolderBase]: 8127/11542 cut-off events. [2024-06-21 21:54:07,300 INFO L125 PetriNetUnfolderBase]: For 139329/139354 co-relation queries the response was YES. [2024-06-21 21:54:07,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57513 conditions, 11542 events. 8127/11542 cut-off events. For 139329/139354 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 63545 event pairs, 2974 based on Foata normal form. 26/11556 useless extension candidates. Maximal degree in co-relation 57467. Up to 10859 conditions per place. [2024-06-21 21:54:07,379 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 138 selfloop transitions, 60 changer transitions 0/204 dead transitions. [2024-06-21 21:54:07,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 204 transitions, 2059 flow [2024-06-21 21:54:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 21:54:07,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-21 21:54:07,381 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1210 flow. Second operand 7 states and 178 transitions. [2024-06-21 21:54:07,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 204 transitions, 2059 flow [2024-06-21 21:54:07,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 204 transitions, 2008 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:07,495 INFO L231 Difference]: Finished difference. Result has 111 places, 155 transitions, 1515 flow [2024-06-21 21:54:07,496 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} [2024-06-21 21:54:07,496 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-21 21:54:07,496 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 155 transitions, 1515 flow [2024-06-21 21:54:07,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:07,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:07,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:07,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:54:07,497 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:07,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:07,497 INFO L85 PathProgramCache]: Analyzing trace with hash -419533143, now seen corresponding path program 1 times [2024-06-21 21:54:07,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:07,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65449314] [2024-06-21 21:54:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:07,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:10,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:10,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65449314] [2024-06-21 21:54:10,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65449314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:10,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:10,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:10,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314020136] [2024-06-21 21:54:10,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:10,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:10,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:10,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:10,311 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) [2024-06-21 21:54:10,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:10,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:10,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:12,741 INFO L124 PetriNetUnfolderBase]: 8430/11956 cut-off events. [2024-06-21 21:54:12,742 INFO L125 PetriNetUnfolderBase]: For 155788/155804 co-relation queries the response was YES. [2024-06-21 21:54:12,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63435 conditions, 11956 events. 8430/11956 cut-off events. For 155788/155804 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 65575 event pairs, 2968 based on Foata normal form. 22/11973 useless extension candidates. Maximal degree in co-relation 63388. Up to 11475 conditions per place. [2024-06-21 21:54:12,821 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 185 selfloop transitions, 38 changer transitions 0/229 dead transitions. [2024-06-21 21:54:12,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 229 transitions, 2449 flow [2024-06-21 21:54:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:54:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:54:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 21:54:12,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:54:12,823 INFO L175 Difference]: Start difference. First operand has 111 places, 155 transitions, 1515 flow. Second operand 9 states and 208 transitions. [2024-06-21 21:54:12,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 229 transitions, 2449 flow [2024-06-21 21:54:12,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 229 transitions, 2356 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 21:54:13,001 INFO L231 Difference]: Finished difference. Result has 120 places, 174 transitions, 1737 flow [2024-06-21 21:54:13,001 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} [2024-06-21 21:54:13,001 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-21 21:54:13,001 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 174 transitions, 1737 flow [2024-06-21 21:54:13,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:13,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:13,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:13,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:54:13,002 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:13,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash -419533484, now seen corresponding path program 2 times [2024-06-21 21:54:13,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:13,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188666802] [2024-06-21 21:54:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:13,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:15,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:15,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188666802] [2024-06-21 21:54:15,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188666802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:15,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:15,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183663713] [2024-06-21 21:54:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:15,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:15,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:15,974 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) [2024-06-21 21:54:15,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:15,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:15,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:18,470 INFO L124 PetriNetUnfolderBase]: 8525/12107 cut-off events. [2024-06-21 21:54:18,470 INFO L125 PetriNetUnfolderBase]: For 177133/177149 co-relation queries the response was YES. [2024-06-21 21:54:18,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67325 conditions, 12107 events. 8525/12107 cut-off events. For 177133/177149 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 66537 event pairs, 2986 based on Foata normal form. 18/12120 useless extension candidates. Maximal degree in co-relation 67274. Up to 11713 conditions per place. [2024-06-21 21:54:18,553 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 190 selfloop transitions, 33 changer transitions 0/229 dead transitions. [2024-06-21 21:54:18,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 229 transitions, 2512 flow [2024-06-21 21:54:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 21:54:18,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43990384615384615 [2024-06-21 21:54:18,555 INFO L175 Difference]: Start difference. First operand has 120 places, 174 transitions, 1737 flow. Second operand 8 states and 183 transitions. [2024-06-21 21:54:18,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 229 transitions, 2512 flow [2024-06-21 21:54:18,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 229 transitions, 2406 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 21:54:18,789 INFO L231 Difference]: Finished difference. Result has 126 places, 184 transitions, 1859 flow [2024-06-21 21:54:18,790 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} [2024-06-21 21:54:18,790 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 21:54:18,790 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 184 transitions, 1859 flow [2024-06-21 21:54:18,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:18,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:18,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:54:18,790 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:18,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1402191365, now seen corresponding path program 2 times [2024-06-21 21:54:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758055044] [2024-06-21 21:54:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:21,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758055044] [2024-06-21 21:54:21,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758055044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:21,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:21,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:21,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711210063] [2024-06-21 21:54:21,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:21,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:21,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:21,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:21,529 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) [2024-06-21 21:54:21,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:21,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:21,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:23,763 INFO L124 PetriNetUnfolderBase]: 8551/12141 cut-off events. [2024-06-21 21:54:23,763 INFO L125 PetriNetUnfolderBase]: For 188845/188861 co-relation queries the response was YES. [2024-06-21 21:54:23,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68007 conditions, 12141 events. 8551/12141 cut-off events. For 188845/188861 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 66597 event pairs, 2958 based on Foata normal form. 22/12158 useless extension candidates. Maximal degree in co-relation 67953. Up to 11626 conditions per place. [2024-06-21 21:54:23,847 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 182 selfloop transitions, 41 changer transitions 0/229 dead transitions. [2024-06-21 21:54:23,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 229 transitions, 2538 flow [2024-06-21 21:54:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 21:54:23,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-21 21:54:23,849 INFO L175 Difference]: Start difference. First operand has 126 places, 184 transitions, 1859 flow. Second operand 7 states and 164 transitions. [2024-06-21 21:54:23,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 229 transitions, 2538 flow [2024-06-21 21:54:24,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 229 transitions, 2438 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:24,095 INFO L231 Difference]: Finished difference. Result has 129 places, 190 transitions, 1961 flow [2024-06-21 21:54:24,095 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=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1961, PETRI_PLACES=129, PETRI_TRANSITIONS=190} [2024-06-21 21:54:24,095 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-21 21:54:24,095 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 190 transitions, 1961 flow [2024-06-21 21:54:24,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:24,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:24,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:24,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:54:24,096 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:24,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1401805415, now seen corresponding path program 3 times [2024-06-21 21:54:24,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:24,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907638613] [2024-06-21 21:54:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:24,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:26,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:26,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907638613] [2024-06-21 21:54:26,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907638613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:26,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:26,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:26,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53428725] [2024-06-21 21:54:26,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:26,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:26,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:26,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:26,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 190 transitions, 1961 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:26,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:26,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:26,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:29,338 INFO L124 PetriNetUnfolderBase]: 8621/12236 cut-off events. [2024-06-21 21:54:29,338 INFO L125 PetriNetUnfolderBase]: For 204546/204643 co-relation queries the response was YES. [2024-06-21 21:54:29,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70058 conditions, 12236 events. 8621/12236 cut-off events. For 204546/204643 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 67281 event pairs, 2976 based on Foata normal form. 62/12285 useless extension candidates. Maximal degree in co-relation 70002. Up to 11474 conditions per place. [2024-06-21 21:54:29,418 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 177 selfloop transitions, 56 changer transitions 0/239 dead transitions. [2024-06-21 21:54:29,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 239 transitions, 2798 flow [2024-06-21 21:54:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 21:54:29,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 21:54:29,420 INFO L175 Difference]: Start difference. First operand has 129 places, 190 transitions, 1961 flow. Second operand 6 states and 146 transitions. [2024-06-21 21:54:29,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 239 transitions, 2798 flow [2024-06-21 21:54:29,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 239 transitions, 2678 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:29,729 INFO L231 Difference]: Finished difference. Result has 132 places, 204 transitions, 2188 flow [2024-06-21 21:54:29,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2188, PETRI_PLACES=132, PETRI_TRANSITIONS=204} [2024-06-21 21:54:29,730 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-21 21:54:29,730 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 204 transitions, 2188 flow [2024-06-21 21:54:29,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:29,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:29,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:29,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:54:29,730 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:29,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1402191706, now seen corresponding path program 3 times [2024-06-21 21:54:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:29,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329280279] [2024-06-21 21:54:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:32,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:32,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329280279] [2024-06-21 21:54:32,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329280279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:32,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:32,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273171580] [2024-06-21 21:54:32,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:32,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:32,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:32,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:32,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:32,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 204 transitions, 2188 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:32,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:32,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:32,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:35,511 INFO L124 PetriNetUnfolderBase]: 8690/12336 cut-off events. [2024-06-21 21:54:35,512 INFO L125 PetriNetUnfolderBase]: For 213516/213532 co-relation queries the response was YES. [2024-06-21 21:54:35,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72667 conditions, 12336 events. 8690/12336 cut-off events. For 213516/213532 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 67872 event pairs, 2998 based on Foata normal form. 18/12349 useless extension candidates. Maximal degree in co-relation 72609. Up to 11634 conditions per place. [2024-06-21 21:54:35,591 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 195 selfloop transitions, 74 changer transitions 0/275 dead transitions. [2024-06-21 21:54:35,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 275 transitions, 3122 flow [2024-06-21 21:54:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 21:54:35,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 21:54:35,593 INFO L175 Difference]: Start difference. First operand has 132 places, 204 transitions, 2188 flow. Second operand 8 states and 202 transitions. [2024-06-21 21:54:35,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 275 transitions, 3122 flow [2024-06-21 21:54:35,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 275 transitions, 3038 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-21 21:54:35,886 INFO L231 Difference]: Finished difference. Result has 140 places, 213 transitions, 2463 flow [2024-06-21 21:54:35,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2104, 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=2463, PETRI_PLACES=140, PETRI_TRANSITIONS=213} [2024-06-21 21:54:35,886 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-21 21:54:35,886 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 213 transitions, 2463 flow [2024-06-21 21:54:35,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:35,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:35,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:35,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:54:35,886 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:35,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:35,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1652106885, now seen corresponding path program 1 times [2024-06-21 21:54:35,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:35,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835364292] [2024-06-21 21:54:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:38,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:38,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835364292] [2024-06-21 21:54:38,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835364292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:38,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:38,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:38,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584010003] [2024-06-21 21:54:38,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:38,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:38,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:38,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:38,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:38,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 213 transitions, 2463 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:38,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:38,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:38,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:40,895 INFO L124 PetriNetUnfolderBase]: 8834/12536 cut-off events. [2024-06-21 21:54:40,895 INFO L125 PetriNetUnfolderBase]: For 218956/218958 co-relation queries the response was YES. [2024-06-21 21:54:40,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72930 conditions, 12536 events. 8834/12536 cut-off events. For 218956/218958 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 69003 event pairs, 3230 based on Foata normal form. 8/12535 useless extension candidates. Maximal degree in co-relation 72868. Up to 11888 conditions per place. [2024-06-21 21:54:41,008 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 232 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-21 21:54:41,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 275 transitions, 3509 flow [2024-06-21 21:54:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 21:54:41,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:54:41,010 INFO L175 Difference]: Start difference. First operand has 140 places, 213 transitions, 2463 flow. Second operand 7 states and 175 transitions. [2024-06-21 21:54:41,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 275 transitions, 3509 flow [2024-06-21 21:54:41,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 275 transitions, 3363 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:41,442 INFO L231 Difference]: Finished difference. Result has 144 places, 228 transitions, 2609 flow [2024-06-21 21:54:41,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2325, 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=2609, PETRI_PLACES=144, PETRI_TRANSITIONS=228} [2024-06-21 21:54:41,442 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-21 21:54:41,442 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 228 transitions, 2609 flow [2024-06-21 21:54:41,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:41,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:41,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:54:41,443 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:41,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1029255689, now seen corresponding path program 2 times [2024-06-21 21:54:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:41,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37962569] [2024-06-21 21:54:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:43,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:43,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37962569] [2024-06-21 21:54:43,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37962569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:43,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:43,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:43,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251015603] [2024-06-21 21:54:43,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:43,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:43,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:43,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:43,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:43,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:43,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 228 transitions, 2609 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:43,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:43,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:43,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:46,502 INFO L124 PetriNetUnfolderBase]: 8956/12705 cut-off events. [2024-06-21 21:54:46,502 INFO L125 PetriNetUnfolderBase]: For 232027/232035 co-relation queries the response was YES. [2024-06-21 21:54:46,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76550 conditions, 12705 events. 8956/12705 cut-off events. For 232027/232035 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 70012 event pairs, 3221 based on Foata normal form. 12/12710 useless extension candidates. Maximal degree in co-relation 76485. Up to 12084 conditions per place. [2024-06-21 21:54:46,603 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 246 selfloop transitions, 39 changer transitions 0/291 dead transitions. [2024-06-21 21:54:46,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 291 transitions, 3673 flow [2024-06-21 21:54:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 21:54:46,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 21:54:46,605 INFO L175 Difference]: Start difference. First operand has 144 places, 228 transitions, 2609 flow. Second operand 8 states and 196 transitions. [2024-06-21 21:54:46,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 291 transitions, 3673 flow [2024-06-21 21:54:47,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 291 transitions, 3554 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-21 21:54:47,039 INFO L231 Difference]: Finished difference. Result has 151 places, 239 transitions, 2769 flow [2024-06-21 21:54:47,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2510, 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=2769, PETRI_PLACES=151, PETRI_TRANSITIONS=239} [2024-06-21 21:54:47,039 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-21 21:54:47,039 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 239 transitions, 2769 flow [2024-06-21 21:54:47,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:47,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:47,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:47,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:54:47,040 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:47,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1029250109, now seen corresponding path program 3 times [2024-06-21 21:54:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:47,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97947821] [2024-06-21 21:54:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:47,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:49,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:49,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97947821] [2024-06-21 21:54:49,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97947821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:49,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:49,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:49,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820515552] [2024-06-21 21:54:49,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:49,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:49,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:49,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:49,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:49,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 239 transitions, 2769 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:49,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:49,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:49,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:51,965 INFO L124 PetriNetUnfolderBase]: 8938/12684 cut-off events. [2024-06-21 21:54:51,965 INFO L125 PetriNetUnfolderBase]: For 247861/247863 co-relation queries the response was YES. [2024-06-21 21:54:52,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77268 conditions, 12684 events. 8938/12684 cut-off events. For 247861/247863 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 69963 event pairs, 3245 based on Foata normal form. 8/12683 useless extension candidates. Maximal degree in co-relation 77200. Up to 12074 conditions per place. [2024-06-21 21:54:52,056 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 234 selfloop transitions, 35 changer transitions 0/275 dead transitions. [2024-06-21 21:54:52,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 275 transitions, 3511 flow [2024-06-21 21:54:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 21:54:52,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:54:52,057 INFO L175 Difference]: Start difference. First operand has 151 places, 239 transitions, 2769 flow. Second operand 6 states and 150 transitions. [2024-06-21 21:54:52,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 275 transitions, 3511 flow [2024-06-21 21:54:52,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 275 transitions, 3372 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:52,415 INFO L231 Difference]: Finished difference. Result has 153 places, 239 transitions, 2711 flow [2024-06-21 21:54:52,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2630, 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=2711, PETRI_PLACES=153, PETRI_TRANSITIONS=239} [2024-06-21 21:54:52,416 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-21 21:54:52,416 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 239 transitions, 2711 flow [2024-06-21 21:54:52,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:52,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:52,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:52,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:54:52,416 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:52,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1401791527, now seen corresponding path program 1 times [2024-06-21 21:54:52,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:52,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537298215] [2024-06-21 21:54:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:52,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:55,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:55,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537298215] [2024-06-21 21:54:55,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537298215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:55,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:55,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:55,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339036888] [2024-06-21 21:54:55,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:55,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:55,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:55,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:55,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:54:55,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 239 transitions, 2711 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:55,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:55,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:54:55,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:58,481 INFO L124 PetriNetUnfolderBase]: 9022/12799 cut-off events. [2024-06-21 21:54:58,481 INFO L125 PetriNetUnfolderBase]: For 263328/263333 co-relation queries the response was YES. [2024-06-21 21:54:58,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78429 conditions, 12799 events. 9022/12799 cut-off events. For 263328/263333 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 70616 event pairs, 3222 based on Foata normal form. 18/12810 useless extension candidates. Maximal degree in co-relation 78359. Up to 12296 conditions per place. [2024-06-21 21:54:58,571 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-21 21:54:58,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 277 transitions, 3485 flow [2024-06-21 21:54:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 21:54:58,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2024-06-21 21:54:58,572 INFO L175 Difference]: Start difference. First operand has 153 places, 239 transitions, 2711 flow. Second operand 6 states and 145 transitions. [2024-06-21 21:54:58,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 277 transitions, 3485 flow [2024-06-21 21:54:58,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 277 transitions, 3415 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:58,950 INFO L231 Difference]: Finished difference. Result has 154 places, 242 transitions, 2760 flow [2024-06-21 21:54:58,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2641, 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=2760, PETRI_PLACES=154, PETRI_TRANSITIONS=242} [2024-06-21 21:54:58,950 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-21 21:54:58,950 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 242 transitions, 2760 flow [2024-06-21 21:54:58,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:58,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:58,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:58,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:54:58,951 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:54:58,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1717553435, now seen corresponding path program 1 times [2024-06-21 21:54:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:58,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924651068] [2024-06-21 21:54:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:02,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:02,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924651068] [2024-06-21 21:55:02,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924651068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:02,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:02,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:02,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060945469] [2024-06-21 21:55:02,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:02,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:02,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:02,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:02,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:55:02,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 242 transitions, 2760 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:02,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:02,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:55:02,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:05,690 INFO L124 PetriNetUnfolderBase]: 9870/13934 cut-off events. [2024-06-21 21:55:05,690 INFO L125 PetriNetUnfolderBase]: For 311263/311289 co-relation queries the response was YES. [2024-06-21 21:55:05,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87345 conditions, 13934 events. 9870/13934 cut-off events. For 311263/311289 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 77216 event pairs, 3090 based on Foata normal form. 38/13960 useless extension candidates. Maximal degree in co-relation 87274. Up to 11984 conditions per place. [2024-06-21 21:55:05,792 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 225 selfloop transitions, 117 changer transitions 0/348 dead transitions. [2024-06-21 21:55:05,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 348 transitions, 4491 flow [2024-06-21 21:55:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:55:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:55:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-06-21 21:55:05,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2024-06-21 21:55:05,794 INFO L175 Difference]: Start difference. First operand has 154 places, 242 transitions, 2760 flow. Second operand 11 states and 276 transitions. [2024-06-21 21:55:05,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 348 transitions, 4491 flow [2024-06-21 21:55:06,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 348 transitions, 4406 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 21:55:06,267 INFO L231 Difference]: Finished difference. Result has 164 places, 265 transitions, 3275 flow [2024-06-21 21:55:06,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2675, 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=3275, PETRI_PLACES=164, PETRI_TRANSITIONS=265} [2024-06-21 21:55:06,268 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-21 21:55:06,268 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 265 transitions, 3275 flow [2024-06-21 21:55:06,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:06,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:06,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:06,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:55:06,269 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:55:06,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:06,269 INFO L85 PathProgramCache]: Analyzing trace with hash -992529243, now seen corresponding path program 1 times [2024-06-21 21:55:06,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:06,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931461061] [2024-06-21 21:55:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:06,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:09,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:09,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931461061] [2024-06-21 21:55:09,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931461061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:09,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:09,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:09,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160343361] [2024-06-21 21:55:09,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:09,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:09,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:09,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:55:09,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 265 transitions, 3275 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:09,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:09,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:55:09,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:12,564 INFO L124 PetriNetUnfolderBase]: 9934/14023 cut-off events. [2024-06-21 21:55:12,565 INFO L125 PetriNetUnfolderBase]: For 352241/352255 co-relation queries the response was YES. [2024-06-21 21:55:12,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94146 conditions, 14023 events. 9934/14023 cut-off events. For 352241/352255 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 77675 event pairs, 3201 based on Foata normal form. 12/14025 useless extension candidates. Maximal degree in co-relation 94071. Up to 13095 conditions per place. [2024-06-21 21:55:12,669 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 225 selfloop transitions, 91 changer transitions 0/322 dead transitions. [2024-06-21 21:55:12,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 322 transitions, 4467 flow [2024-06-21 21:55:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 21:55:12,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-21 21:55:12,670 INFO L175 Difference]: Start difference. First operand has 164 places, 265 transitions, 3275 flow. Second operand 7 states and 174 transitions. [2024-06-21 21:55:12,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 322 transitions, 4467 flow [2024-06-21 21:55:13,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 322 transitions, 4201 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:13,198 INFO L231 Difference]: Finished difference. Result has 167 places, 277 transitions, 3466 flow [2024-06-21 21:55:13,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3023, 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=3466, PETRI_PLACES=167, PETRI_TRANSITIONS=277} [2024-06-21 21:55:13,199 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-21 21:55:13,199 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 277 transitions, 3466 flow [2024-06-21 21:55:13,199 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) [2024-06-21 21:55:13,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:13,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:13,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:55:13,199 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:55:13,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash -987767643, now seen corresponding path program 2 times [2024-06-21 21:55:13,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:13,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242644672] [2024-06-21 21:55:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:13,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:16,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:16,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242644672] [2024-06-21 21:55:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242644672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:16,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548935852] [2024-06-21 21:55:16,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:16,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:55:16,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 277 transitions, 3466 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:16,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:16,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:55:16,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:19,493 INFO L124 PetriNetUnfolderBase]: 9915/14021 cut-off events. [2024-06-21 21:55:19,493 INFO L125 PetriNetUnfolderBase]: For 362790/362803 co-relation queries the response was YES. [2024-06-21 21:55:19,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93924 conditions, 14021 events. 9915/14021 cut-off events. For 362790/362803 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 77875 event pairs, 3174 based on Foata normal form. 16/14032 useless extension candidates. Maximal degree in co-relation 93846. Up to 13523 conditions per place. [2024-06-21 21:55:19,601 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 281 selfloop transitions, 33 changer transitions 0/320 dead transitions. [2024-06-21 21:55:19,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 320 transitions, 4223 flow [2024-06-21 21:55:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 21:55:19,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2024-06-21 21:55:19,602 INFO L175 Difference]: Start difference. First operand has 167 places, 277 transitions, 3466 flow. Second operand 8 states and 181 transitions. [2024-06-21 21:55:19,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 320 transitions, 4223 flow [2024-06-21 21:55:20,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 320 transitions, 4052 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 21:55:20,083 INFO L231 Difference]: Finished difference. Result has 172 places, 277 transitions, 3372 flow [2024-06-21 21:55:20,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3295, 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=3372, PETRI_PLACES=172, PETRI_TRANSITIONS=277} [2024-06-21 21:55:20,083 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-21 21:55:20,083 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 277 transitions, 3372 flow [2024-06-21 21:55:20,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:20,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:20,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:20,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:55:20,084 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:55:20,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash -120633393, now seen corresponding path program 2 times [2024-06-21 21:55:20,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:20,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320704694] [2024-06-21 21:55:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320704694] [2024-06-21 21:55:23,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320704694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:23,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:23,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:23,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664283610] [2024-06-21 21:55:23,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:23,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:23,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:55:23,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 277 transitions, 3372 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:23,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:23,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:55:23,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:27,447 INFO L124 PetriNetUnfolderBase]: 10543/14861 cut-off events. [2024-06-21 21:55:27,447 INFO L125 PetriNetUnfolderBase]: For 408478/408491 co-relation queries the response was YES. [2024-06-21 21:55:27,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99954 conditions, 14861 events. 10543/14861 cut-off events. For 408478/408491 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 82528 event pairs, 3174 based on Foata normal form. 28/14884 useless extension candidates. Maximal degree in co-relation 99875. Up to 13640 conditions per place. [2024-06-21 21:55:27,560 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 301 selfloop transitions, 64 changer transitions 0/371 dead transitions. [2024-06-21 21:55:27,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 371 transitions, 4931 flow [2024-06-21 21:55:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:55:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:55:27,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-06-21 21:55:27,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632867132867133 [2024-06-21 21:55:27,562 INFO L175 Difference]: Start difference. First operand has 172 places, 277 transitions, 3372 flow. Second operand 11 states and 265 transitions. [2024-06-21 21:55:27,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 371 transitions, 4931 flow [2024-06-21 21:55:28,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 371 transitions, 4865 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:55:28,211 INFO L231 Difference]: Finished difference. Result has 178 places, 294 transitions, 3704 flow [2024-06-21 21:55:28,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3306, 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=3704, PETRI_PLACES=178, PETRI_TRANSITIONS=294} [2024-06-21 21:55:28,211 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-21 21:55:28,211 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 294 transitions, 3704 flow [2024-06-21 21:55:28,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:28,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:28,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:28,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:55:28,212 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:55:28,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash -987761071, now seen corresponding path program 3 times [2024-06-21 21:55:28,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:28,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686032940] [2024-06-21 21:55:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:28,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686032940] [2024-06-21 21:55:31,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686032940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:31,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:31,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:31,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251541112] [2024-06-21 21:55:31,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:31,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:31,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:32,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:55:32,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 294 transitions, 3704 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:32,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:32,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:55:32,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:36,045 INFO L124 PetriNetUnfolderBase]: 10693/15083 cut-off events. [2024-06-21 21:55:36,045 INFO L125 PetriNetUnfolderBase]: For 441852/441865 co-relation queries the response was YES. [2024-06-21 21:55:36,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104388 conditions, 15083 events. 10693/15083 cut-off events. For 441852/441865 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 84208 event pairs, 3154 based on Foata normal form. 28/15106 useless extension candidates. Maximal degree in co-relation 104306. Up to 13754 conditions per place. [2024-06-21 21:55:36,176 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 302 selfloop transitions, 75 changer transitions 0/383 dead transitions. [2024-06-21 21:55:36,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 383 transitions, 5179 flow [2024-06-21 21:55:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:55:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:55:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-21 21:55:36,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 21:55:36,177 INFO L175 Difference]: Start difference. First operand has 178 places, 294 transitions, 3704 flow. Second operand 12 states and 282 transitions. [2024-06-21 21:55:36,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 383 transitions, 5179 flow [2024-06-21 21:55:36,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 383 transitions, 5047 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:36,977 INFO L231 Difference]: Finished difference. Result has 186 places, 307 transitions, 4016 flow [2024-06-21 21:55:36,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3578, 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=4016, PETRI_PLACES=186, PETRI_TRANSITIONS=307} [2024-06-21 21:55:36,977 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-21 21:55:36,977 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 307 transitions, 4016 flow [2024-06-21 21:55:36,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:36,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:36,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:36,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:55:36,978 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:55:36,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:36,978 INFO L85 PathProgramCache]: Analyzing trace with hash 203580581, now seen corresponding path program 3 times [2024-06-21 21:55:36,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:36,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431604501] [2024-06-21 21:55:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:36,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:39,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:39,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431604501] [2024-06-21 21:55:39,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431604501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:39,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:39,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:39,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192066156] [2024-06-21 21:55:39,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:39,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:39,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:39,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:39,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:55:39,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 307 transitions, 4016 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:39,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:39,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:55:39,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:43,459 INFO L124 PetriNetUnfolderBase]: 10712/15088 cut-off events. [2024-06-21 21:55:43,459 INFO L125 PetriNetUnfolderBase]: For 470310/470374 co-relation queries the response was YES. [2024-06-21 21:55:43,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107134 conditions, 15088 events. 10712/15088 cut-off events. For 470310/470374 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 83905 event pairs, 3364 based on Foata normal form. 24/15084 useless extension candidates. Maximal degree in co-relation 107048. Up to 14096 conditions per place. [2024-06-21 21:55:43,584 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 252 selfloop transitions, 98 changer transitions 0/356 dead transitions. [2024-06-21 21:55:43,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 356 transitions, 5272 flow [2024-06-21 21:55:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 21:55:43,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-21 21:55:43,586 INFO L175 Difference]: Start difference. First operand has 186 places, 307 transitions, 4016 flow. Second operand 7 states and 172 transitions. [2024-06-21 21:55:43,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 356 transitions, 5272 flow [2024-06-21 21:55:44,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 356 transitions, 5118 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:44,477 INFO L231 Difference]: Finished difference. Result has 187 places, 311 transitions, 4144 flow [2024-06-21 21:55:44,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3862, 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=4144, PETRI_PLACES=187, PETRI_TRANSITIONS=311} [2024-06-21 21:55:44,477 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-21 21:55:44,477 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 311 transitions, 4144 flow [2024-06-21 21:55:44,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:44,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:44,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:44,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:55:44,478 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:55:44,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash 214056101, now seen corresponding path program 4 times [2024-06-21 21:55:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:44,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145907541] [2024-06-21 21:55:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:44,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:47,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:47,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145907541] [2024-06-21 21:55:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145907541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:47,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:47,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:47,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436104916] [2024-06-21 21:55:47,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:47,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:47,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:47,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:47,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:55:47,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 311 transitions, 4144 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:47,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:47,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:55:47,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:50,724 INFO L124 PetriNetUnfolderBase]: 10705/15065 cut-off events. [2024-06-21 21:55:50,724 INFO L125 PetriNetUnfolderBase]: For 488675/488727 co-relation queries the response was YES. [2024-06-21 21:55:50,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107447 conditions, 15065 events. 10705/15065 cut-off events. For 488675/488727 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 83752 event pairs, 3368 based on Foata normal form. 20/15057 useless extension candidates. Maximal degree in co-relation 107359. Up to 14091 conditions per place. [2024-06-21 21:55:50,861 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 244 selfloop transitions, 99 changer transitions 0/349 dead transitions. [2024-06-21 21:55:50,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 349 transitions, 5180 flow [2024-06-21 21:55:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 21:55:50,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 21:55:50,862 INFO L175 Difference]: Start difference. First operand has 187 places, 311 transitions, 4144 flow. Second operand 7 states and 167 transitions. [2024-06-21 21:55:50,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 349 transitions, 5180 flow [2024-06-21 21:55:51,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 349 transitions, 4802 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 21:55:51,716 INFO L231 Difference]: Finished difference. Result has 187 places, 311 transitions, 3973 flow [2024-06-21 21:55:51,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3766, 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=3973, PETRI_PLACES=187, PETRI_TRANSITIONS=311} [2024-06-21 21:55:51,717 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-21 21:55:51,717 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 311 transitions, 3973 flow [2024-06-21 21:55:51,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:51,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:51,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:51,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:55:51,717 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:55:51,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash -512549625, now seen corresponding path program 5 times [2024-06-21 21:55:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:51,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249468648] [2024-06-21 21:55:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:51,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:54,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:54,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249468648] [2024-06-21 21:55:54,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249468648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:54,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:54,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:54,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130214794] [2024-06-21 21:55:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:54,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:54,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:54,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:55:54,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 311 transitions, 3973 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:54,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:54,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:55:54,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:57,999 INFO L124 PetriNetUnfolderBase]: 10698/15101 cut-off events. [2024-06-21 21:55:58,000 INFO L125 PetriNetUnfolderBase]: For 505069/505149 co-relation queries the response was YES. [2024-06-21 21:55:58,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107678 conditions, 15101 events. 10698/15101 cut-off events. For 505069/505149 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 84371 event pairs, 3294 based on Foata normal form. 51/15139 useless extension candidates. Maximal degree in co-relation 107590. Up to 14231 conditions per place. [2024-06-21 21:55:58,134 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 280 selfloop transitions, 76 changer transitions 0/362 dead transitions. [2024-06-21 21:55:58,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 362 transitions, 4968 flow [2024-06-21 21:55:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:55:58,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 21:55:58,136 INFO L175 Difference]: Start difference. First operand has 187 places, 311 transitions, 3973 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:55:58,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 362 transitions, 4968 flow [2024-06-21 21:55:59,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 362 transitions, 4697 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:59,027 INFO L231 Difference]: Finished difference. Result has 189 places, 311 transitions, 3871 flow [2024-06-21 21:55:59,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3702, 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=3871, PETRI_PLACES=189, PETRI_TRANSITIONS=311} [2024-06-21 21:55:59,028 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-06-21 21:55:59,028 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 311 transitions, 3871 flow [2024-06-21 21:55:59,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:59,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:59,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:59,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:55:59,028 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:55:59,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash -518263545, now seen corresponding path program 6 times [2024-06-21 21:55:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:59,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582402479] [2024-06-21 21:55:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:01,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582402479] [2024-06-21 21:56:01,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582402479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:01,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:01,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647534446] [2024-06-21 21:56:01,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:01,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:01,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:01,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:01,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:56:01,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 311 transitions, 3871 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:01,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:01,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:56:01,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:05,694 INFO L124 PetriNetUnfolderBase]: 10679/15079 cut-off events. [2024-06-21 21:56:05,694 INFO L125 PetriNetUnfolderBase]: For 525473/525486 co-relation queries the response was YES. [2024-06-21 21:56:05,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107929 conditions, 15079 events. 10679/15079 cut-off events. For 525473/525486 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 84353 event pairs, 3277 based on Foata normal form. 16/15090 useless extension candidates. Maximal degree in co-relation 107840. Up to 14212 conditions per place. [2024-06-21 21:56:05,840 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 289 selfloop transitions, 76 changer transitions 0/371 dead transitions. [2024-06-21 21:56:05,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 371 transitions, 4784 flow [2024-06-21 21:56:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 21:56:05,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831730769230769 [2024-06-21 21:56:05,842 INFO L175 Difference]: Start difference. First operand has 189 places, 311 transitions, 3871 flow. Second operand 8 states and 201 transitions. [2024-06-21 21:56:05,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 371 transitions, 4784 flow [2024-06-21 21:56:06,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 371 transitions, 4620 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:56:06,974 INFO L231 Difference]: Finished difference. Result has 191 places, 311 transitions, 3888 flow [2024-06-21 21:56:06,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3707, 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=3888, PETRI_PLACES=191, PETRI_TRANSITIONS=311} [2024-06-21 21:56:06,974 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-21 21:56:06,974 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 311 transitions, 3888 flow [2024-06-21 21:56:06,974 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) [2024-06-21 21:56:06,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:06,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:06,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:56:06,975 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)] === [2024-06-21 21:56:06,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:06,975 INFO L85 PathProgramCache]: Analyzing trace with hash -518256973, now seen corresponding path program 4 times [2024-06-21 21:56:06,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:06,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845243084] [2024-06-21 21:56:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:06,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:10,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:10,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845243084] [2024-06-21 21:56:10,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845243084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:10,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:10,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:10,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010740170] [2024-06-21 21:56:10,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:10,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:10,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:10,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:10,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:10,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:56:10,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 311 transitions, 3888 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:10,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:10,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:56:10,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:14,332 INFO L124 PetriNetUnfolderBase]: 11773/16583 cut-off events. [2024-06-21 21:56:14,333 INFO L125 PetriNetUnfolderBase]: For 574377/574390 co-relation queries the response was YES. [2024-06-21 21:56:14,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119221 conditions, 16583 events. 11773/16583 cut-off events. For 574377/574390 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 93713 event pairs, 3234 based on Foata normal form. 28/16606 useless extension candidates. Maximal degree in co-relation 119132. Up to 14141 conditions per place. [2024-06-21 21:56:14,761 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 296 selfloop transitions, 139 changer transitions 0/441 dead transitions. [2024-06-21 21:56:14,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 441 transitions, 6021 flow [2024-06-21 21:56:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:56:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:56:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-21 21:56:14,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 21:56:14,763 INFO L175 Difference]: Start difference. First operand has 191 places, 311 transitions, 3888 flow. Second operand 10 states and 247 transitions. [2024-06-21 21:56:14,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 441 transitions, 6021 flow [2024-06-21 21:56:15,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 441 transitions, 5783 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 21:56:15,960 INFO L231 Difference]: Finished difference. Result has 193 places, 364 transitions, 4854 flow [2024-06-21 21:56:15,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3662, 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=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4854, PETRI_PLACES=193, PETRI_TRANSITIONS=364} [2024-06-21 21:56:15,961 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 138 predicate places. [2024-06-21 21:56:15,961 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 364 transitions, 4854 flow [2024-06-21 21:56:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:15,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:15,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:15,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:56:15,961 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)] === [2024-06-21 21:56:15,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 257490437, now seen corresponding path program 5 times [2024-06-21 21:56:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:15,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273453835] [2024-06-21 21:56:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:15,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:19,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273453835] [2024-06-21 21:56:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273453835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:19,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:19,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792482038] [2024-06-21 21:56:19,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:19,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:19,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:19,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:56:19,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 364 transitions, 4854 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:19,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:19,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:56:19,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:23,779 INFO L124 PetriNetUnfolderBase]: 11737/16559 cut-off events. [2024-06-21 21:56:23,780 INFO L125 PetriNetUnfolderBase]: For 559476/559489 co-relation queries the response was YES. [2024-06-21 21:56:23,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121748 conditions, 16559 events. 11737/16559 cut-off events. For 559476/559489 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 93724 event pairs, 3338 based on Foata normal form. 28/16582 useless extension candidates. Maximal degree in co-relation 121658. Up to 14125 conditions per place. [2024-06-21 21:56:23,937 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 305 selfloop transitions, 147 changer transitions 0/458 dead transitions. [2024-06-21 21:56:23,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 458 transitions, 6420 flow [2024-06-21 21:56:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:56:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:56:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-06-21 21:56:23,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48426573426573427 [2024-06-21 21:56:23,939 INFO L175 Difference]: Start difference. First operand has 193 places, 364 transitions, 4854 flow. Second operand 11 states and 277 transitions. [2024-06-21 21:56:23,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 458 transitions, 6420 flow [2024-06-21 21:56:25,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 458 transitions, 6209 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:25,306 INFO L231 Difference]: Finished difference. Result has 201 places, 372 transitions, 5261 flow [2024-06-21 21:56:25,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4659, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5261, PETRI_PLACES=201, PETRI_TRANSITIONS=372} [2024-06-21 21:56:25,307 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-21 21:56:25,307 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 372 transitions, 5261 flow [2024-06-21 21:56:25,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:25,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:25,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:25,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:56:25,307 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:56:25,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash -506292523, now seen corresponding path program 6 times [2024-06-21 21:56:25,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:25,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102679833] [2024-06-21 21:56:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:25,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:28,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102679833] [2024-06-21 21:56:28,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102679833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:28,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:28,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501339339] [2024-06-21 21:56:28,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:28,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:28,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:28,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:56:28,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 372 transitions, 5261 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:28,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:28,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:56:28,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:33,699 INFO L124 PetriNetUnfolderBase]: 12373/17492 cut-off events. [2024-06-21 21:56:33,699 INFO L125 PetriNetUnfolderBase]: For 605157/605239 co-relation queries the response was YES. [2024-06-21 21:56:33,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131177 conditions, 17492 events. 12373/17492 cut-off events. For 605157/605239 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 99825 event pairs, 3084 based on Foata normal form. 65/17544 useless extension candidates. Maximal degree in co-relation 131083. Up to 13588 conditions per place. [2024-06-21 21:56:33,868 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 262 selfloop transitions, 205 changer transitions 0/473 dead transitions. [2024-06-21 21:56:33,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 473 transitions, 7278 flow [2024-06-21 21:56:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:56:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:56:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-21 21:56:33,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49423076923076925 [2024-06-21 21:56:33,869 INFO L175 Difference]: Start difference. First operand has 201 places, 372 transitions, 5261 flow. Second operand 10 states and 257 transitions. [2024-06-21 21:56:33,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 473 transitions, 7278 flow [2024-06-21 21:56:35,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 473 transitions, 7025 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 21:56:35,536 INFO L231 Difference]: Finished difference. Result has 206 places, 394 transitions, 5897 flow [2024-06-21 21:56:35,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5897, PETRI_PLACES=206, PETRI_TRANSITIONS=394} [2024-06-21 21:56:35,536 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 151 predicate places. [2024-06-21 21:56:35,537 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 394 transitions, 5897 flow [2024-06-21 21:56:35,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:35,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:35,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:56:35,537 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:56:35,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash -678605061, now seen corresponding path program 1 times [2024-06-21 21:56:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504661814] [2024-06-21 21:56:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:38,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:38,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504661814] [2024-06-21 21:56:38,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504661814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:38,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:38,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:38,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44860609] [2024-06-21 21:56:38,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:38,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:38,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:38,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:38,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:38,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:56:38,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 394 transitions, 5897 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:38,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:38,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:56:38,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:42,424 INFO L124 PetriNetUnfolderBase]: 12405/17486 cut-off events. [2024-06-21 21:56:42,424 INFO L125 PetriNetUnfolderBase]: For 680943/680948 co-relation queries the response was YES. [2024-06-21 21:56:42,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138434 conditions, 17486 events. 12405/17486 cut-off events. For 680943/680948 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 100058 event pairs, 3736 based on Foata normal form. 6/17485 useless extension candidates. Maximal degree in co-relation 138337. Up to 16708 conditions per place. [2024-06-21 21:56:42,601 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 405 selfloop transitions, 29 changer transitions 0/440 dead transitions. [2024-06-21 21:56:42,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 440 transitions, 7185 flow [2024-06-21 21:56:42,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 21:56:42,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-21 21:56:42,603 INFO L175 Difference]: Start difference. First operand has 206 places, 394 transitions, 5897 flow. Second operand 7 states and 163 transitions. [2024-06-21 21:56:42,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 440 transitions, 7185 flow [2024-06-21 21:56:44,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 440 transitions, 6876 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:44,526 INFO L231 Difference]: Finished difference. Result has 208 places, 400 transitions, 5836 flow [2024-06-21 21:56:44,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5604, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5836, PETRI_PLACES=208, PETRI_TRANSITIONS=400} [2024-06-21 21:56:44,527 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 153 predicate places. [2024-06-21 21:56:44,527 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 400 transitions, 5836 flow [2024-06-21 21:56:44,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:44,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:44,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:44,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:56:44,527 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:56:44,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1482095429, now seen corresponding path program 2 times [2024-06-21 21:56:44,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:44,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282477000] [2024-06-21 21:56:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:44,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:46,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:46,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282477000] [2024-06-21 21:56:46,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282477000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:46,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:46,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:46,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213279629] [2024-06-21 21:56:46,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:46,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:46,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:46,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:56:46,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 400 transitions, 5836 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:46,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:46,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:56:46,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:51,237 INFO L124 PetriNetUnfolderBase]: 12437/17530 cut-off events. [2024-06-21 21:56:51,237 INFO L125 PetriNetUnfolderBase]: For 692270/692275 co-relation queries the response was YES. [2024-06-21 21:56:51,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137161 conditions, 17530 events. 12437/17530 cut-off events. For 692270/692275 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 100258 event pairs, 3880 based on Foata normal form. 6/17529 useless extension candidates. Maximal degree in co-relation 137063. Up to 16830 conditions per place. [2024-06-21 21:56:51,453 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 406 selfloop transitions, 24 changer transitions 0/436 dead transitions. [2024-06-21 21:56:51,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 436 transitions, 6876 flow [2024-06-21 21:56:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 21:56:51,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:56:51,455 INFO L175 Difference]: Start difference. First operand has 208 places, 400 transitions, 5836 flow. Second operand 7 states and 156 transitions. [2024-06-21 21:56:51,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 436 transitions, 6876 flow [2024-06-21 21:56:53,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 436 transitions, 6711 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-21 21:56:53,093 INFO L231 Difference]: Finished difference. Result has 212 places, 403 transitions, 5819 flow [2024-06-21 21:56:53,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5705, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5819, PETRI_PLACES=212, PETRI_TRANSITIONS=403} [2024-06-21 21:56:53,094 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 157 predicate places. [2024-06-21 21:56:53,094 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 403 transitions, 5819 flow [2024-06-21 21:56:53,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:53,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:53,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:53,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:56:53,094 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:56:53,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1841980101, now seen corresponding path program 3 times [2024-06-21 21:56:53,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:53,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993880079] [2024-06-21 21:56:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:53,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:55,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993880079] [2024-06-21 21:56:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993880079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:55,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:55,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301228361] [2024-06-21 21:56:55,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:55,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:55,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:56:55,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 403 transitions, 5819 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:55,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:55,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:56:55,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:59,928 INFO L124 PetriNetUnfolderBase]: 12425/17514 cut-off events. [2024-06-21 21:56:59,929 INFO L125 PetriNetUnfolderBase]: For 717041/717046 co-relation queries the response was YES. [2024-06-21 21:57:00,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137339 conditions, 17514 events. 12425/17514 cut-off events. For 717041/717046 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 100008 event pairs, 3728 based on Foata normal form. 6/17513 useless extension candidates. Maximal degree in co-relation 137239. Up to 16787 conditions per place. [2024-06-21 21:57:00,105 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 406 selfloop transitions, 23 changer transitions 0/435 dead transitions. [2024-06-21 21:57:00,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 435 transitions, 6769 flow [2024-06-21 21:57:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:57:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:57:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 21:57:00,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-21 21:57:00,106 INFO L175 Difference]: Start difference. First operand has 212 places, 403 transitions, 5819 flow. Second operand 6 states and 142 transitions. [2024-06-21 21:57:00,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 435 transitions, 6769 flow [2024-06-21 21:57:01,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 435 transitions, 6649 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:01,882 INFO L231 Difference]: Finished difference. Result has 213 places, 403 transitions, 5757 flow [2024-06-21 21:57:01,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5699, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5757, PETRI_PLACES=213, PETRI_TRANSITIONS=403} [2024-06-21 21:57:01,883 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 158 predicate places. [2024-06-21 21:57:01,884 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 403 transitions, 5757 flow [2024-06-21 21:57:01,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:01,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:01,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:01,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:57:01,884 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:01,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:01,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1578160181, now seen corresponding path program 1 times [2024-06-21 21:57:01,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:01,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917424651] [2024-06-21 21:57:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:01,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat