./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe019_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe019_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:15:13,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:15:13,866 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:15:13,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:15:13,875 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:15:13,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:15:13,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:15:13,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:15:13,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:15:13,895 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:15:13,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:15:13,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:15:13,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:15:13,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:15:13,897 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:15:13,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:15:13,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:15:13,898 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:15:13,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:15:13,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:15:13,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:15:13,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:15:13,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:15:13,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:15:13,901 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:15:13,901 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:15:13,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:15:13,902 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:15:13,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:15:13,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:15:13,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:15:13,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:15:13,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:15:13,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:15:13,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:15:13,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:15:13,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:15:13,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:15:13,905 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:15:13,906 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:15:13,906 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:15:13,906 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:15:13,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:15:13,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:15:14,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:15:14,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:15:14,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:15:14,165 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:15:14,166 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:15:14,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe019_power.opt.yml/witness.yml [2024-06-20 17:15:14,449 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:15:14,449 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:15:14,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-20 17:15:15,611 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:15:15,894 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:15:15,894 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-20 17:15:15,920 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd14e99b7/37659922079147748cafc17a885b805e/FLAG95c27498e [2024-06-20 17:15:15,932 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd14e99b7/37659922079147748cafc17a885b805e [2024-06-20 17:15:15,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:15:15,935 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:15:15,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:15:15,936 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:15:15,941 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:15:15,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:15:14" (1/2) ... [2024-06-20 17:15:15,943 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6becec7e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:15:15, skipping insertion in model container [2024-06-20 17:15:15,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:15:14" (1/2) ... [2024-06-20 17:15:15,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9d5b04d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:15:15, skipping insertion in model container [2024-06-20 17:15:15,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:15:15" (2/2) ... [2024-06-20 17:15:15,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6becec7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:15, skipping insertion in model container [2024-06-20 17:15:15,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:15:15" (2/2) ... [2024-06-20 17:15:15,947 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:15:16,121 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:15:16,122 INFO L97 edCorrectnessWitness]: Location invariant before [L889-L889] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-20 17:15:16,123 INFO L97 edCorrectnessWitness]: Location invariant before [L887-L887] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-20 17:15:16,123 INFO L97 edCorrectnessWitness]: Location invariant before [L885-L885] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-20 17:15:16,123 INFO L97 edCorrectnessWitness]: Location invariant before [L890-L890] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-20 17:15:16,123 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:15:16,123 INFO L106 edCorrectnessWitness]: ghost_update [L883-L883] multithreaded = 1; [2024-06-20 17:15:16,159 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:15:16,537 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:15:16,552 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:15:16,732 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:15:16,797 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:15:16,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16 WrapperNode [2024-06-20 17:15:16,798 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:15:16,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:15:16,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:15:16,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:15:16,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:16,857 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:16,905 INFO L138 Inliner]: procedures = 176, calls = 105, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 289 [2024-06-20 17:15:16,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:15:16,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:15:16,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:15:16,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:15:16,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:16,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:16,957 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:17,032 INFO L175 MemorySlicer]: Split 58 memory accesses to 2 slices as follows [2, 56]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-20 17:15:17,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:17,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:17,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:17,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:17,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:17,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:17,103 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:15:17,104 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:15:17,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:15:17,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:15:17,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (1/1) ... [2024-06-20 17:15:17,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:15:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:15:17,142 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) [2024-06-20 17:15:17,155 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 [2024-06-20 17:15:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:15:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:15:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:15:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:15:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:15:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:15:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:15:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:15:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:15:17,191 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:15:17,191 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:15:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:15:17,192 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 17:15:17,193 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 17:15:17,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:15:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:15:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:15:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:15:17,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:15:17,200 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:15:17,367 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:15:17,369 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:15:17,954 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:15:17,954 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:15:18,583 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:15:18,584 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:15:18,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:15:18 BoogieIcfgContainer [2024-06-20 17:15:18,584 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:15:18,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:15:18,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:15:18,590 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:15:18,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:15:14" (1/4) ... [2024-06-20 17:15:18,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5555cb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:15:18, skipping insertion in model container [2024-06-20 17:15:18,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:15:15" (2/4) ... [2024-06-20 17:15:18,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5555cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:15:18, skipping insertion in model container [2024-06-20 17:15:18,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:15:16" (3/4) ... [2024-06-20 17:15:18,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5555cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:15:18, skipping insertion in model container [2024-06-20 17:15:18,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:15:18" (4/4) ... [2024-06-20 17:15:18,594 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2024-06-20 17:15:18,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:15:18,613 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 17:15:18,613 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:15:18,736 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:15:18,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 17:15:18,822 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-20 17:15:18,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:15:18,825 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 74 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. [2024-06-20 17:15:18,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 17:15:18,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-20 17:15:18,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:15:18,850 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;@1ebfbbd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:15:18,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 17:15:18,857 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:15:18,857 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 17:15:18,858 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:15:18,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:18,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:15:18,860 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)] === [2024-06-20 17:15:18,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash 992381459, now seen corresponding path program 1 times [2024-06-20 17:15:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:18,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475246428] [2024-06-20 17:15:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:18,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:21,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:21,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475246428] [2024-06-20 17:15:21,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475246428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:21,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:21,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:15:21,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526605402] [2024-06-20 17:15:21,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:21,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:15:21,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:15:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:15:21,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 17:15:21,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:21,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:21,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 17:15:21,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:24,344 INFO L124 PetriNetUnfolderBase]: 6711/9234 cut-off events. [2024-06-20 17:15:24,345 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-06-20 17:15:24,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18754 conditions, 9234 events. 6711/9234 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48440 event pairs, 4089 based on Foata normal form. 2/9094 useless extension candidates. Maximal degree in co-relation 18741. Up to 9183 conditions per place. [2024-06-20 17:15:24,404 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 48 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-20 17:15:24,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 247 flow [2024-06-20 17:15:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:15:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:15:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-20 17:15:24,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-20 17:15:24,419 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 90 transitions. [2024-06-20 17:15:24,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 247 flow [2024-06-20 17:15:24,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:24,426 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-20 17:15:24,427 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} [2024-06-20 17:15:24,434 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-20 17:15:24,434 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-20 17:15:24,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:24,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:24,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:24,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:15:24,436 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)] === [2024-06-20 17:15:24,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:24,437 INFO L85 PathProgramCache]: Analyzing trace with hash -815477215, now seen corresponding path program 1 times [2024-06-20 17:15:24,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:24,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959164270] [2024-06-20 17:15:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:24,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:28,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:28,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959164270] [2024-06-20 17:15:28,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959164270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:28,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:28,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:15:28,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294644184] [2024-06-20 17:15:28,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:28,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:15:28,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:15:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:15:28,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:28,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:28,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:28,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:28,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:31,615 INFO L124 PetriNetUnfolderBase]: 8525/11670 cut-off events. [2024-06-20 17:15:31,616 INFO L125 PetriNetUnfolderBase]: For 2111/2111 co-relation queries the response was YES. [2024-06-20 17:15:31,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26842 conditions, 11670 events. 8525/11670 cut-off events. For 2111/2111 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59795 event pairs, 4020 based on Foata normal form. 8/11674 useless extension candidates. Maximal degree in co-relation 26830. Up to 11534 conditions per place. [2024-06-20 17:15:31,686 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 59 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-06-20 17:15:31,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 333 flow [2024-06-20 17:15:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:15:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:15:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-20 17:15:31,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336538461538461 [2024-06-20 17:15:31,692 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 111 transitions. [2024-06-20 17:15:31,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 333 flow [2024-06-20 17:15:31,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:15:31,701 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 166 flow [2024-06-20 17:15:31,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-20 17:15:31,703 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-06-20 17:15:31,703 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 166 flow [2024-06-20 17:15:31,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:31,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:31,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:31,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:15:31,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:15:31,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash -579300484, now seen corresponding path program 1 times [2024-06-20 17:15:31,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:31,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028897686] [2024-06-20 17:15:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:31,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:33,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:33,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028897686] [2024-06-20 17:15:33,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028897686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:33,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:33,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:15:33,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339669234] [2024-06-20 17:15:33,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:33,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:15:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:15:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:15:33,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:33,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:33,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:33,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:33,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:36,005 INFO L124 PetriNetUnfolderBase]: 6713/9255 cut-off events. [2024-06-20 17:15:36,005 INFO L125 PetriNetUnfolderBase]: For 4637/4637 co-relation queries the response was YES. [2024-06-20 17:15:36,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23400 conditions, 9255 events. 6713/9255 cut-off events. For 4637/4637 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48672 event pairs, 3676 based on Foata normal form. 6/9259 useless extension candidates. Maximal degree in co-relation 23385. Up to 9173 conditions per place. [2024-06-20 17:15:36,052 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 63 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-20 17:15:36,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 406 flow [2024-06-20 17:15:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:15:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:15:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-20 17:15:36,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576923076923077 [2024-06-20 17:15:36,054 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 166 flow. Second operand 5 states and 119 transitions. [2024-06-20 17:15:36,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 406 flow [2024-06-20 17:15:36,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 382 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 17:15:36,058 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 232 flow [2024-06-20 17:15:36,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-20 17:15:36,059 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-06-20 17:15:36,059 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 232 flow [2024-06-20 17:15:36,059 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) [2024-06-20 17:15:36,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:36,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:36,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:15:36,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:15:36,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash -778444326, now seen corresponding path program 1 times [2024-06-20 17:15:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:36,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924263146] [2024-06-20 17:15:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:39,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:39,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924263146] [2024-06-20 17:15:39,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924263146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:39,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:39,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:15:39,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722808125] [2024-06-20 17:15:39,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:39,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:15:39,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:15:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:15:39,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:39,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:39,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:39,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:39,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:41,147 INFO L124 PetriNetUnfolderBase]: 6731/9280 cut-off events. [2024-06-20 17:15:41,148 INFO L125 PetriNetUnfolderBase]: For 9348/9348 co-relation queries the response was YES. [2024-06-20 17:15:41,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26684 conditions, 9280 events. 6731/9280 cut-off events. For 9348/9348 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48505 event pairs, 3546 based on Foata normal form. 6/9284 useless extension candidates. Maximal degree in co-relation 26666. Up to 9160 conditions per place. [2024-06-20 17:15:41,193 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-06-20 17:15:41,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 514 flow [2024-06-20 17:15:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 17:15:41,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 17:15:41,200 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 232 flow. Second operand 6 states and 143 transitions. [2024-06-20 17:15:41,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 514 flow [2024-06-20 17:15:41,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 494 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-20 17:15:41,208 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 292 flow [2024-06-20 17:15:41,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-20 17:15:41,210 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-20 17:15:41,210 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 292 flow [2024-06-20 17:15:41,211 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) [2024-06-20 17:15:41,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:41,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:41,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:15:41,212 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)] === [2024-06-20 17:15:41,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1638031195, now seen corresponding path program 1 times [2024-06-20 17:15:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:41,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158828005] [2024-06-20 17:15:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:44,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158828005] [2024-06-20 17:15:44,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158828005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:44,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:44,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:44,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792588841] [2024-06-20 17:15:44,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:44,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:44,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:44,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:44,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:44,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:44,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:46,491 INFO L124 PetriNetUnfolderBase]: 6916/9559 cut-off events. [2024-06-20 17:15:46,492 INFO L125 PetriNetUnfolderBase]: For 16326/16326 co-relation queries the response was YES. [2024-06-20 17:15:46,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30835 conditions, 9559 events. 6916/9559 cut-off events. For 16326/16326 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 50083 event pairs, 3427 based on Foata normal form. 36/9593 useless extension candidates. Maximal degree in co-relation 30815. Up to 9151 conditions per place. [2024-06-20 17:15:46,552 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 86 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2024-06-20 17:15:46,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 110 transitions, 650 flow [2024-06-20 17:15:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 17:15:46,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-20 17:15:46,558 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 292 flow. Second operand 7 states and 170 transitions. [2024-06-20 17:15:46,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 110 transitions, 650 flow [2024-06-20 17:15:46,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 110 transitions, 608 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:46,569 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 330 flow [2024-06-20 17:15:46,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-20 17:15:46,572 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-20 17:15:46,572 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 330 flow [2024-06-20 17:15:46,573 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) [2024-06-20 17:15:46,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:46,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:46,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:15:46,573 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)] === [2024-06-20 17:15:46,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1373474045, now seen corresponding path program 1 times [2024-06-20 17:15:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635002311] [2024-06-20 17:15:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:49,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:49,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635002311] [2024-06-20 17:15:49,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635002311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:49,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:49,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:49,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772980769] [2024-06-20 17:15:49,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:49,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:49,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:49,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:49,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:15:49,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:49,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:49,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:15:49,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:51,714 INFO L124 PetriNetUnfolderBase]: 8704/11952 cut-off events. [2024-06-20 17:15:51,714 INFO L125 PetriNetUnfolderBase]: For 26646/26646 co-relation queries the response was YES. [2024-06-20 17:15:51,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40005 conditions, 11952 events. 8704/11952 cut-off events. For 26646/26646 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61457 event pairs, 3942 based on Foata normal form. 3/11951 useless extension candidates. Maximal degree in co-relation 39984. Up to 11774 conditions per place. [2024-06-20 17:15:51,798 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 71 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-20 17:15:51,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 608 flow [2024-06-20 17:15:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:15:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:15:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 17:15:51,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-20 17:15:51,801 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 330 flow. Second operand 5 states and 118 transitions. [2024-06-20 17:15:51,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 608 flow [2024-06-20 17:15:51,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 93 transitions, 572 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:51,817 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 388 flow [2024-06-20 17:15:51,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-20 17:15:51,821 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-20 17:15:51,821 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 388 flow [2024-06-20 17:15:51,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:51,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:51,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:51,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:15:51,822 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)] === [2024-06-20 17:15:51,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:51,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1077609035, now seen corresponding path program 1 times [2024-06-20 17:15:51,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:51,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768361175] [2024-06-20 17:15:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:51,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:54,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:54,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768361175] [2024-06-20 17:15:54,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768361175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:54,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:54,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:54,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260146541] [2024-06-20 17:15:54,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:54,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:54,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:15:54,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 388 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:54,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:54,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:15:54,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:57,426 INFO L124 PetriNetUnfolderBase]: 8731/11999 cut-off events. [2024-06-20 17:15:57,426 INFO L125 PetriNetUnfolderBase]: For 36259/36259 co-relation queries the response was YES. [2024-06-20 17:15:57,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42946 conditions, 11999 events. 8731/11999 cut-off events. For 36259/36259 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61686 event pairs, 3812 based on Foata normal form. 3/11998 useless extension candidates. Maximal degree in co-relation 42924. Up to 11763 conditions per place. [2024-06-20 17:15:57,497 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 83 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-20 17:15:57,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 773 flow [2024-06-20 17:15:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 17:15:57,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-20 17:15:57,500 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 388 flow. Second operand 6 states and 142 transitions. [2024-06-20 17:15:57,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 773 flow [2024-06-20 17:15:57,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 113 transitions, 736 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:15:57,514 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 536 flow [2024-06-20 17:15:57,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=536, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-20 17:15:57,515 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2024-06-20 17:15:57,515 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 536 flow [2024-06-20 17:15:57,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:57,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:57,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:57,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:15:57,516 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)] === [2024-06-20 17:15:57,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:57,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2086013827, now seen corresponding path program 2 times [2024-06-20 17:15:57,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:57,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529463586] [2024-06-20 17:15:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:57,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:00,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529463586] [2024-06-20 17:16:00,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529463586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:00,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:00,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:00,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218904727] [2024-06-20 17:16:00,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:00,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:00,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:00,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:00,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:00,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 536 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:00,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:00,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:00,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:03,076 INFO L124 PetriNetUnfolderBase]: 8722/11987 cut-off events. [2024-06-20 17:16:03,077 INFO L125 PetriNetUnfolderBase]: For 50951/50951 co-relation queries the response was YES. [2024-06-20 17:16:03,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46582 conditions, 11987 events. 8722/11987 cut-off events. For 50951/50951 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 62025 event pairs, 3812 based on Foata normal form. 3/11986 useless extension candidates. Maximal degree in co-relation 46558. Up to 11694 conditions per place. [2024-06-20 17:16:03,133 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 85 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-20 17:16:03,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 126 transitions, 932 flow [2024-06-20 17:16:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 17:16:03,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-20 17:16:03,135 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 536 flow. Second operand 7 states and 164 transitions. [2024-06-20 17:16:03,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 126 transitions, 932 flow [2024-06-20 17:16:03,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 126 transitions, 847 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:03,160 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 592 flow [2024-06-20 17:16:03,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=592, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-20 17:16:03,162 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-20 17:16:03,162 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 592 flow [2024-06-20 17:16:03,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:03,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:03,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:03,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:16:03,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:16:03,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1086089989, now seen corresponding path program 1 times [2024-06-20 17:16:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:03,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43627047] [2024-06-20 17:16:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:05,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43627047] [2024-06-20 17:16:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43627047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:05,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:05,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:16:05,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173058640] [2024-06-20 17:16:05,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:16:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:16:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:16:05,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:16:05,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 592 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:05,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:05,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:16:05,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:07,749 INFO L124 PetriNetUnfolderBase]: 6911/9554 cut-off events. [2024-06-20 17:16:07,750 INFO L125 PetriNetUnfolderBase]: For 53347/53347 co-relation queries the response was YES. [2024-06-20 17:16:07,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40938 conditions, 9554 events. 6911/9554 cut-off events. For 53347/53347 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 50037 event pairs, 3262 based on Foata normal form. 4/9554 useless extension candidates. Maximal degree in co-relation 40913. Up to 9455 conditions per place. [2024-06-20 17:16:07,807 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 87 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2024-06-20 17:16:07,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 886 flow [2024-06-20 17:16:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:16:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:16:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-20 17:16:07,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-20 17:16:07,808 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 592 flow. Second operand 5 states and 115 transitions. [2024-06-20 17:16:07,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 886 flow [2024-06-20 17:16:07,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 777 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:07,825 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 567 flow [2024-06-20 17:16:07,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=567, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2024-06-20 17:16:07,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-20 17:16:07,826 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 567 flow [2024-06-20 17:16:07,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:07,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:07,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:07,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:16:07,827 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)] === [2024-06-20 17:16:07,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:07,827 INFO L85 PathProgramCache]: Analyzing trace with hash -98476438, now seen corresponding path program 1 times [2024-06-20 17:16:07,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:07,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300572298] [2024-06-20 17:16:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:07,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:10,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:10,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300572298] [2024-06-20 17:16:10,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300572298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:10,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:10,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:10,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681876129] [2024-06-20 17:16:10,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:10,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:10,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:10,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:10,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:10,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 567 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:10,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:10,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:10,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:12,938 INFO L124 PetriNetUnfolderBase]: 8745/12024 cut-off events. [2024-06-20 17:16:12,938 INFO L125 PetriNetUnfolderBase]: For 74935/74935 co-relation queries the response was YES. [2024-06-20 17:16:12,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52245 conditions, 12024 events. 8745/12024 cut-off events. For 74935/74935 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61803 event pairs, 2892 based on Foata normal form. 6/12026 useless extension candidates. Maximal degree in co-relation 52219. Up to 11820 conditions per place. [2024-06-20 17:16:13,007 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 104 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-20 17:16:13,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 124 transitions, 931 flow [2024-06-20 17:16:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:16:13,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-20 17:16:13,009 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 567 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:16:13,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 124 transitions, 931 flow [2024-06-20 17:16:13,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 124 transitions, 885 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:16:13,047 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 611 flow [2024-06-20 17:16:13,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=611, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2024-06-20 17:16:13,048 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-20 17:16:13,048 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 611 flow [2024-06-20 17:16:13,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:13,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:13,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:13,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:16:13,049 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)] === [2024-06-20 17:16:13,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash 953854848, now seen corresponding path program 2 times [2024-06-20 17:16:13,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:13,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334012422] [2024-06-20 17:16:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:13,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:15,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334012422] [2024-06-20 17:16:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334012422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:15,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:15,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384621048] [2024-06-20 17:16:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:15,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:15,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:15,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:15,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 611 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:15,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:15,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:15,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:18,311 INFO L124 PetriNetUnfolderBase]: 8730/12003 cut-off events. [2024-06-20 17:16:18,311 INFO L125 PetriNetUnfolderBase]: For 87626/87626 co-relation queries the response was YES. [2024-06-20 17:16:18,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54304 conditions, 12003 events. 8730/12003 cut-off events. For 87626/87626 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61751 event pairs, 3498 based on Foata normal form. 6/12005 useless extension candidates. Maximal degree in co-relation 54277. Up to 11739 conditions per place. [2024-06-20 17:16:18,377 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 99 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-20 17:16:18,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 1011 flow [2024-06-20 17:16:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 17:16:18,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-20 17:16:18,379 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 611 flow. Second operand 6 states and 140 transitions. [2024-06-20 17:16:18,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 1011 flow [2024-06-20 17:16:18,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 129 transitions, 947 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:18,422 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 690 flow [2024-06-20 17:16:18,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=690, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-20 17:16:18,423 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-20 17:16:18,423 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 690 flow [2024-06-20 17:16:18,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:18,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:18,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:18,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:16:18,424 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)] === [2024-06-20 17:16:18,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:18,424 INFO L85 PathProgramCache]: Analyzing trace with hash 953859808, now seen corresponding path program 1 times [2024-06-20 17:16:18,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:18,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149168737] [2024-06-20 17:16:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:18,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:21,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:21,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149168737] [2024-06-20 17:16:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149168737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:21,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:21,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654695358] [2024-06-20 17:16:21,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:21,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:21,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:21,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:21,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 690 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:21,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:21,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:21,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:24,785 INFO L124 PetriNetUnfolderBase]: 8886/12259 cut-off events. [2024-06-20 17:16:24,785 INFO L125 PetriNetUnfolderBase]: For 108452/108452 co-relation queries the response was YES. [2024-06-20 17:16:24,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57975 conditions, 12259 events. 8886/12259 cut-off events. For 108452/108452 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 63528 event pairs, 3143 based on Foata normal form. 24/12279 useless extension candidates. Maximal degree in co-relation 57947. Up to 11715 conditions per place. [2024-06-20 17:16:24,862 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 112 selfloop transitions, 30 changer transitions 0/147 dead transitions. [2024-06-20 17:16:24,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 147 transitions, 1178 flow [2024-06-20 17:16:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 17:16:24,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 17:16:24,866 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 690 flow. Second operand 7 states and 168 transitions. [2024-06-20 17:16:24,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 147 transitions, 1178 flow [2024-06-20 17:16:24,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 147 transitions, 1083 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:24,917 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 747 flow [2024-06-20 17:16:24,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-06-20 17:16:24,918 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-20 17:16:24,918 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 747 flow [2024-06-20 17:16:24,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:24,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:24,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:16:24,918 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)] === [2024-06-20 17:16:24,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash 241927232, now seen corresponding path program 2 times [2024-06-20 17:16:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532290418] [2024-06-20 17:16:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:28,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:28,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532290418] [2024-06-20 17:16:28,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532290418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:28,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:28,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:28,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29890884] [2024-06-20 17:16:28,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:28,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:28,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:28,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:28,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:28,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:28,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 747 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:28,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:28,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:28,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:31,190 INFO L124 PetriNetUnfolderBase]: 9149/12668 cut-off events. [2024-06-20 17:16:31,190 INFO L125 PetriNetUnfolderBase]: For 127779/127786 co-relation queries the response was YES. [2024-06-20 17:16:31,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62168 conditions, 12668 events. 9149/12668 cut-off events. For 127779/127786 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 66382 event pairs, 3286 based on Foata normal form. 24/12690 useless extension candidates. Maximal degree in co-relation 62139. Up to 11676 conditions per place. [2024-06-20 17:16:31,261 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 127 selfloop transitions, 35 changer transitions 0/167 dead transitions. [2024-06-20 17:16:31,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 167 transitions, 1427 flow [2024-06-20 17:16:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 17:16:31,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-20 17:16:31,263 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 747 flow. Second operand 8 states and 194 transitions. [2024-06-20 17:16:31,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 167 transitions, 1427 flow [2024-06-20 17:16:31,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 167 transitions, 1359 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:31,325 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 862 flow [2024-06-20 17:16:31,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=862, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2024-06-20 17:16:31,325 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-20 17:16:31,326 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 862 flow [2024-06-20 17:16:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:31,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:31,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:31,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:16:31,326 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)] === [2024-06-20 17:16:31,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1094848792, now seen corresponding path program 3 times [2024-06-20 17:16:31,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:31,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310795983] [2024-06-20 17:16:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:31,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:35,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:35,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310795983] [2024-06-20 17:16:35,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310795983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:35,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:35,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:35,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894881236] [2024-06-20 17:16:35,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:35,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:35,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:35,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:35,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:35,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:35,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:35,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:35,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:35,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:38,447 INFO L124 PetriNetUnfolderBase]: 9095/12590 cut-off events. [2024-06-20 17:16:38,448 INFO L125 PetriNetUnfolderBase]: For 142849/142856 co-relation queries the response was YES. [2024-06-20 17:16:38,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62977 conditions, 12590 events. 9095/12590 cut-off events. For 142849/142856 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 65881 event pairs, 3516 based on Foata normal form. 30/12618 useless extension candidates. Maximal degree in co-relation 62947. Up to 12104 conditions per place. [2024-06-20 17:16:38,510 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 133 selfloop transitions, 31 changer transitions 0/169 dead transitions. [2024-06-20 17:16:38,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 169 transitions, 1370 flow [2024-06-20 17:16:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:16:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:16:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 17:16:38,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465811965811966 [2024-06-20 17:16:38,512 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 862 flow. Second operand 9 states and 209 transitions. [2024-06-20 17:16:38,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 169 transitions, 1370 flow [2024-06-20 17:16:38,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 169 transitions, 1314 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:38,630 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 888 flow [2024-06-20 17:16:38,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=888, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2024-06-20 17:16:38,631 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-20 17:16:38,631 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 888 flow [2024-06-20 17:16:38,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:38,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:38,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:38,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:16:38,632 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:16:38,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash 711507228, now seen corresponding path program 1 times [2024-06-20 17:16:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:38,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236415001] [2024-06-20 17:16:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:41,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236415001] [2024-06-20 17:16:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236415001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:41,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:41,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:16:41,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362668868] [2024-06-20 17:16:41,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:41,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:16:41,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:16:41,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:16:41,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:41,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 888 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:41,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:41,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:41,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:44,252 INFO L124 PetriNetUnfolderBase]: 9121/12621 cut-off events. [2024-06-20 17:16:44,252 INFO L125 PetriNetUnfolderBase]: For 147657/147657 co-relation queries the response was YES. [2024-06-20 17:16:44,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63876 conditions, 12621 events. 9121/12621 cut-off events. For 147657/147657 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66034 event pairs, 3479 based on Foata normal form. 8/12628 useless extension candidates. Maximal degree in co-relation 63844. Up to 12445 conditions per place. [2024-06-20 17:16:44,322 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 129 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-20 17:16:44,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 154 transitions, 1459 flow [2024-06-20 17:16:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:16:44,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-20 17:16:44,324 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 888 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:16:44,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 154 transitions, 1459 flow [2024-06-20 17:16:44,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 154 transitions, 1376 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:16:44,416 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 1027 flow [2024-06-20 17:16:44,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1027, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-20 17:16:44,417 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2024-06-20 17:16:44,417 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 1027 flow [2024-06-20 17:16:44,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:44,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:44,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:44,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:16:44,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:16:44,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:44,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1679885484, now seen corresponding path program 1 times [2024-06-20 17:16:44,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:44,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363498671] [2024-06-20 17:16:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:44,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:47,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:47,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363498671] [2024-06-20 17:16:47,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363498671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:47,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:47,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:47,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502361217] [2024-06-20 17:16:47,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:47,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:47,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:47,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:47,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:47,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:47,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 1027 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:47,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:47,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:47,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:50,613 INFO L124 PetriNetUnfolderBase]: 9233/12788 cut-off events. [2024-06-20 17:16:50,613 INFO L125 PetriNetUnfolderBase]: For 173487/173487 co-relation queries the response was YES. [2024-06-20 17:16:50,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68946 conditions, 12788 events. 9233/12788 cut-off events. For 173487/173487 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 66684 event pairs, 2629 based on Foata normal form. 18/12802 useless extension candidates. Maximal degree in co-relation 68911. Up to 12420 conditions per place. [2024-06-20 17:16:50,696 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 146 selfloop transitions, 19 changer transitions 0/170 dead transitions. [2024-06-20 17:16:50,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 170 transitions, 1534 flow [2024-06-20 17:16:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 17:16:50,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-20 17:16:50,698 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 1027 flow. Second operand 7 states and 161 transitions. [2024-06-20 17:16:50,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 170 transitions, 1534 flow [2024-06-20 17:16:50,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 170 transitions, 1500 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-20 17:16:50,835 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 1102 flow [2024-06-20 17:16:50,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1102, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2024-06-20 17:16:50,836 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-20 17:16:50,836 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 1102 flow [2024-06-20 17:16:50,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:50,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:50,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:50,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:16:50,837 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:16:50,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1590641478, now seen corresponding path program 2 times [2024-06-20 17:16:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:50,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157617058] [2024-06-20 17:16:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:50,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:54,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:54,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157617058] [2024-06-20 17:16:54,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157617058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:54,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:54,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:54,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676442968] [2024-06-20 17:16:54,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:54,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:54,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:54,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:16:54,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 1102 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:54,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:54,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:16:54,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:57,171 INFO L124 PetriNetUnfolderBase]: 9306/12903 cut-off events. [2024-06-20 17:16:57,171 INFO L125 PetriNetUnfolderBase]: For 189956/189956 co-relation queries the response was YES. [2024-06-20 17:16:57,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70737 conditions, 12903 events. 9306/12903 cut-off events. For 189956/189956 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 67513 event pairs, 3418 based on Foata normal form. 18/12917 useless extension candidates. Maximal degree in co-relation 70699. Up to 12331 conditions per place. [2024-06-20 17:16:57,248 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 136 selfloop transitions, 32 changer transitions 0/173 dead transitions. [2024-06-20 17:16:57,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 173 transitions, 1621 flow [2024-06-20 17:16:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 17:16:57,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44505494505494503 [2024-06-20 17:16:57,251 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 1102 flow. Second operand 7 states and 162 transitions. [2024-06-20 17:16:57,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 173 transitions, 1621 flow [2024-06-20 17:16:57,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 173 transitions, 1544 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:57,356 INFO L231 Difference]: Finished difference. Result has 98 places, 127 transitions, 1169 flow [2024-06-20 17:16:57,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1169, PETRI_PLACES=98, PETRI_TRANSITIONS=127} [2024-06-20 17:16:57,356 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-20 17:16:57,356 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 127 transitions, 1169 flow [2024-06-20 17:16:57,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:57,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:57,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:57,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:16:57,357 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)] === [2024-06-20 17:16:57,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:57,357 INFO L85 PathProgramCache]: Analyzing trace with hash -531873810, now seen corresponding path program 1 times [2024-06-20 17:16:57,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:57,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671009346] [2024-06-20 17:16:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:57,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:00,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:00,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671009346] [2024-06-20 17:17:00,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671009346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:00,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:00,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:17:00,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638941786] [2024-06-20 17:17:00,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:00,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:17:00,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:00,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:17:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:17:00,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:00,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 127 transitions, 1169 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) [2024-06-20 17:17:00,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:00,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:00,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:02,756 INFO L124 PetriNetUnfolderBase]: 8897/12498 cut-off events. [2024-06-20 17:17:02,757 INFO L125 PetriNetUnfolderBase]: For 214284/214284 co-relation queries the response was YES. [2024-06-20 17:17:02,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70808 conditions, 12498 events. 8897/12498 cut-off events. For 214284/214284 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 66734 event pairs, 3391 based on Foata normal form. 6/12501 useless extension candidates. Maximal degree in co-relation 70769. Up to 12172 conditions per place. [2024-06-20 17:17:02,845 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 130 selfloop transitions, 20 changer transitions 0/159 dead transitions. [2024-06-20 17:17:02,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 159 transitions, 1611 flow [2024-06-20 17:17:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 17:17:02,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-06-20 17:17:02,847 INFO L175 Difference]: Start difference. First operand has 98 places, 127 transitions, 1169 flow. Second operand 6 states and 137 transitions. [2024-06-20 17:17:02,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 159 transitions, 1611 flow [2024-06-20 17:17:03,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 159 transitions, 1499 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:03,005 INFO L231 Difference]: Finished difference. Result has 99 places, 132 transitions, 1194 flow [2024-06-20 17:17:03,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1194, PETRI_PLACES=99, PETRI_TRANSITIONS=132} [2024-06-20 17:17:03,006 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-20 17:17:03,006 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 132 transitions, 1194 flow [2024-06-20 17:17:03,006 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) [2024-06-20 17:17:03,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:03,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:03,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:17:03,006 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)] === [2024-06-20 17:17:03,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:03,007 INFO L85 PathProgramCache]: Analyzing trace with hash -55346086, now seen corresponding path program 2 times [2024-06-20 17:17:03,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:03,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142542638] [2024-06-20 17:17:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:03,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:05,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142542638] [2024-06-20 17:17:05,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142542638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:05,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:05,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:17:05,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330410148] [2024-06-20 17:17:05,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:05,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:17:05,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:05,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:17:05,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:17:05,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:05,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 132 transitions, 1194 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) [2024-06-20 17:17:05,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:05,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:05,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:08,742 INFO L124 PetriNetUnfolderBase]: 8904/12497 cut-off events. [2024-06-20 17:17:08,742 INFO L125 PetriNetUnfolderBase]: For 233533/233533 co-relation queries the response was YES. [2024-06-20 17:17:08,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73517 conditions, 12497 events. 8904/12497 cut-off events. For 233533/233533 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 66682 event pairs, 3404 based on Foata normal form. 6/12498 useless extension candidates. Maximal degree in co-relation 73477. Up to 12166 conditions per place. [2024-06-20 17:17:08,824 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 131 selfloop transitions, 21 changer transitions 0/161 dead transitions. [2024-06-20 17:17:08,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 161 transitions, 1652 flow [2024-06-20 17:17:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 17:17:08,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2024-06-20 17:17:08,825 INFO L175 Difference]: Start difference. First operand has 99 places, 132 transitions, 1194 flow. Second operand 6 states and 134 transitions. [2024-06-20 17:17:08,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 161 transitions, 1652 flow [2024-06-20 17:17:08,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 161 transitions, 1553 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:08,962 INFO L231 Difference]: Finished difference. Result has 101 places, 136 transitions, 1229 flow [2024-06-20 17:17:08,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1229, PETRI_PLACES=101, PETRI_TRANSITIONS=136} [2024-06-20 17:17:08,963 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-20 17:17:08,963 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 136 transitions, 1229 flow [2024-06-20 17:17:08,963 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) [2024-06-20 17:17:08,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:08,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:08,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:17:08,964 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)] === [2024-06-20 17:17:08,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1726952339, now seen corresponding path program 1 times [2024-06-20 17:17:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:08,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709271676] [2024-06-20 17:17:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:11,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:11,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709271676] [2024-06-20 17:17:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709271676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:11,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:11,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41689176] [2024-06-20 17:17:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:11,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:11,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:11,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:17:11,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 136 transitions, 1229 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:11,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:11,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:17:11,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:15,543 INFO L124 PetriNetUnfolderBase]: 9700/13433 cut-off events. [2024-06-20 17:17:15,543 INFO L125 PetriNetUnfolderBase]: For 257069/257069 co-relation queries the response was YES. [2024-06-20 17:17:15,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80508 conditions, 13433 events. 9700/13433 cut-off events. For 257069/257069 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70599 event pairs, 3385 based on Foata normal form. 16/13445 useless extension candidates. Maximal degree in co-relation 80467. Up to 12922 conditions per place. [2024-06-20 17:17:15,629 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 138 selfloop transitions, 45 changer transitions 0/188 dead transitions. [2024-06-20 17:17:15,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 188 transitions, 1993 flow [2024-06-20 17:17:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-20 17:17:15,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41586538461538464 [2024-06-20 17:17:15,633 INFO L175 Difference]: Start difference. First operand has 101 places, 136 transitions, 1229 flow. Second operand 8 states and 173 transitions. [2024-06-20 17:17:15,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 188 transitions, 1993 flow [2024-06-20 17:17:15,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 188 transitions, 1905 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:15,779 INFO L231 Difference]: Finished difference. Result has 107 places, 152 transitions, 1492 flow [2024-06-20 17:17:15,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1492, PETRI_PLACES=107, PETRI_TRANSITIONS=152} [2024-06-20 17:17:15,779 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-20 17:17:15,779 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 152 transitions, 1492 flow [2024-06-20 17:17:15,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:15,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:15,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:15,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:17:15,780 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)] === [2024-06-20 17:17:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash -799461781, now seen corresponding path program 2 times [2024-06-20 17:17:15,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:15,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243452422] [2024-06-20 17:17:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243452422] [2024-06-20 17:17:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243452422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:18,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:18,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:18,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327052902] [2024-06-20 17:17:18,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:18,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:18,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:17:18,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 152 transitions, 1492 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:18,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:18,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:17:18,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:22,263 INFO L124 PetriNetUnfolderBase]: 9840/13631 cut-off events. [2024-06-20 17:17:22,263 INFO L125 PetriNetUnfolderBase]: For 289446/289446 co-relation queries the response was YES. [2024-06-20 17:17:22,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85961 conditions, 13631 events. 9840/13631 cut-off events. For 289446/289446 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 71895 event pairs, 3397 based on Foata normal form. 16/13643 useless extension candidates. Maximal degree in co-relation 85917. Up to 12790 conditions per place. [2024-06-20 17:17:22,351 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 149 selfloop transitions, 58 changer transitions 0/212 dead transitions. [2024-06-20 17:17:22,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 212 transitions, 2426 flow [2024-06-20 17:17:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 17:17:22,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-20 17:17:22,353 INFO L175 Difference]: Start difference. First operand has 107 places, 152 transitions, 1492 flow. Second operand 7 states and 166 transitions. [2024-06-20 17:17:22,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 212 transitions, 2426 flow [2024-06-20 17:17:22,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 212 transitions, 2339 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:22,532 INFO L231 Difference]: Finished difference. Result has 113 places, 170 transitions, 1862 flow [2024-06-20 17:17:22,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1862, PETRI_PLACES=113, PETRI_TRANSITIONS=170} [2024-06-20 17:17:22,533 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-20 17:17:22,533 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 170 transitions, 1862 flow [2024-06-20 17:17:22,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:22,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:22,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:22,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:17:22,533 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)] === [2024-06-20 17:17:22,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1863425902, now seen corresponding path program 1 times [2024-06-20 17:17:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:22,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174328939] [2024-06-20 17:17:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:22,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:25,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174328939] [2024-06-20 17:17:25,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174328939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:25,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:25,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:25,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668541044] [2024-06-20 17:17:25,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:25,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:25,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:25,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:25,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:25,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 170 transitions, 1862 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) [2024-06-20 17:17:25,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:25,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:25,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:28,573 INFO L124 PetriNetUnfolderBase]: 9422/13185 cut-off events. [2024-06-20 17:17:28,574 INFO L125 PetriNetUnfolderBase]: For 305372/305480 co-relation queries the response was YES. [2024-06-20 17:17:28,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88198 conditions, 13185 events. 9422/13185 cut-off events. For 305372/305480 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 69999 event pairs, 3458 based on Foata normal form. 12/13145 useless extension candidates. Maximal degree in co-relation 88150. Up to 12782 conditions per place. [2024-06-20 17:17:28,677 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 172 selfloop transitions, 28 changer transitions 0/211 dead transitions. [2024-06-20 17:17:28,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 211 transitions, 2448 flow [2024-06-20 17:17:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 17:17:28,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-20 17:17:28,679 INFO L175 Difference]: Start difference. First operand has 113 places, 170 transitions, 1862 flow. Second operand 7 states and 161 transitions. [2024-06-20 17:17:28,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 211 transitions, 2448 flow [2024-06-20 17:17:29,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 211 transitions, 2360 flow, removed 43 selfloop flow, removed 1 redundant places. [2024-06-20 17:17:29,089 INFO L231 Difference]: Finished difference. Result has 119 places, 175 transitions, 1949 flow [2024-06-20 17:17:29,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1949, PETRI_PLACES=119, PETRI_TRANSITIONS=175} [2024-06-20 17:17:29,089 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-20 17:17:29,090 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 175 transitions, 1949 flow [2024-06-20 17:17:29,090 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) [2024-06-20 17:17:29,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:29,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:17:29,090 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)] === [2024-06-20 17:17:29,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:29,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1863335537, now seen corresponding path program 1 times [2024-06-20 17:17:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:29,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898420628] [2024-06-20 17:17:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:29,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:32,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:32,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898420628] [2024-06-20 17:17:32,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898420628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:32,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:32,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:32,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904939639] [2024-06-20 17:17:32,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:32,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:32,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:32,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:17:32,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 175 transitions, 1949 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:32,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:32,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:17:32,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:35,468 INFO L124 PetriNetUnfolderBase]: 10052/13904 cut-off events. [2024-06-20 17:17:35,468 INFO L125 PetriNetUnfolderBase]: For 318107/318107 co-relation queries the response was YES. [2024-06-20 17:17:35,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90885 conditions, 13904 events. 10052/13904 cut-off events. For 318107/318107 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 73129 event pairs, 3458 based on Foata normal form. 8/13911 useless extension candidates. Maximal degree in co-relation 90834. Up to 13671 conditions per place. [2024-06-20 17:17:35,562 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 208 selfloop transitions, 27 changer transitions 0/240 dead transitions. [2024-06-20 17:17:35,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 240 transitions, 2930 flow [2024-06-20 17:17:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 17:17:35,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-20 17:17:35,563 INFO L175 Difference]: Start difference. First operand has 119 places, 175 transitions, 1949 flow. Second operand 7 states and 161 transitions. [2024-06-20 17:17:35,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 240 transitions, 2930 flow [2024-06-20 17:17:35,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 240 transitions, 2791 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:35,780 INFO L231 Difference]: Finished difference. Result has 124 places, 197 transitions, 2201 flow [2024-06-20 17:17:35,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2201, PETRI_PLACES=124, PETRI_TRANSITIONS=197} [2024-06-20 17:17:35,781 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-20 17:17:35,781 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 197 transitions, 2201 flow [2024-06-20 17:17:35,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:35,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:35,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:35,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:17:35,782 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)] === [2024-06-20 17:17:35,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 853012384, now seen corresponding path program 2 times [2024-06-20 17:17:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:35,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630563543] [2024-06-20 17:17:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:39,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630563543] [2024-06-20 17:17:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630563543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:39,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:39,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:39,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062370358] [2024-06-20 17:17:39,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:39,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:39,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:39,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:39,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 197 transitions, 2201 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) [2024-06-20 17:17:39,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:39,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:39,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:42,830 INFO L124 PetriNetUnfolderBase]: 9629/13460 cut-off events. [2024-06-20 17:17:42,830 INFO L125 PetriNetUnfolderBase]: For 354081/354209 co-relation queries the response was YES. [2024-06-20 17:17:42,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93561 conditions, 13460 events. 9629/13460 cut-off events. For 354081/354209 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 71284 event pairs, 3456 based on Foata normal form. 9/13418 useless extension candidates. Maximal degree in co-relation 93506. Up to 13037 conditions per place. [2024-06-20 17:17:42,942 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 190 selfloop transitions, 29 changer transitions 0/234 dead transitions. [2024-06-20 17:17:42,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 234 transitions, 2823 flow [2024-06-20 17:17:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 17:17:42,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43131868131868134 [2024-06-20 17:17:42,944 INFO L175 Difference]: Start difference. First operand has 124 places, 197 transitions, 2201 flow. Second operand 7 states and 157 transitions. [2024-06-20 17:17:42,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 234 transitions, 2823 flow [2024-06-20 17:17:43,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 234 transitions, 2739 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-20 17:17:43,232 INFO L231 Difference]: Finished difference. Result has 130 places, 202 transitions, 2302 flow [2024-06-20 17:17:43,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2302, PETRI_PLACES=130, PETRI_TRANSITIONS=202} [2024-06-20 17:17:43,233 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-20 17:17:43,233 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 202 transitions, 2302 flow [2024-06-20 17:17:43,233 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) [2024-06-20 17:17:43,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:43,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:43,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:17:43,234 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)] === [2024-06-20 17:17:43,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1715726092, now seen corresponding path program 3 times [2024-06-20 17:17:43,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:43,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25098645] [2024-06-20 17:17:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:43,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:46,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:46,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25098645] [2024-06-20 17:17:46,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25098645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:46,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:46,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:46,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085993352] [2024-06-20 17:17:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:46,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:46,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:46,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:46,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 202 transitions, 2302 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) [2024-06-20 17:17:46,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:46,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:46,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:49,724 INFO L124 PetriNetUnfolderBase]: 9655/13490 cut-off events. [2024-06-20 17:17:49,724 INFO L125 PetriNetUnfolderBase]: For 385758/385893 co-relation queries the response was YES. [2024-06-20 17:17:49,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97149 conditions, 13490 events. 9655/13490 cut-off events. For 385758/385893 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 71439 event pairs, 3469 based on Foata normal form. 9/13446 useless extension candidates. Maximal degree in co-relation 97091. Up to 13062 conditions per place. [2024-06-20 17:17:49,830 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 199 selfloop transitions, 27 changer transitions 0/241 dead transitions. [2024-06-20 17:17:49,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 241 transitions, 3000 flow [2024-06-20 17:17:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-20 17:17:49,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-20 17:17:49,832 INFO L175 Difference]: Start difference. First operand has 130 places, 202 transitions, 2302 flow. Second operand 7 states and 154 transitions. [2024-06-20 17:17:49,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 241 transitions, 3000 flow [2024-06-20 17:17:50,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 241 transitions, 2853 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:50,138 INFO L231 Difference]: Finished difference. Result has 133 places, 212 transitions, 2408 flow [2024-06-20 17:17:50,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2408, PETRI_PLACES=133, PETRI_TRANSITIONS=212} [2024-06-20 17:17:50,139 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-20 17:17:50,139 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 212 transitions, 2408 flow [2024-06-20 17:17:50,139 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) [2024-06-20 17:17:50,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:50,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:50,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:17:50,140 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)] === [2024-06-20 17:17:50,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash 858519069, now seen corresponding path program 2 times [2024-06-20 17:17:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:50,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10104619] [2024-06-20 17:17:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:50,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:52,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:52,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10104619] [2024-06-20 17:17:52,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10104619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:52,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:52,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665802034] [2024-06-20 17:17:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:52,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:52,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:52,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:17:52,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 212 transitions, 2408 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:52,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:52,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:17:52,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:56,261 INFO L124 PetriNetUnfolderBase]: 10244/14156 cut-off events. [2024-06-20 17:17:56,261 INFO L125 PetriNetUnfolderBase]: For 424421/424421 co-relation queries the response was YES. [2024-06-20 17:17:56,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104093 conditions, 14156 events. 10244/14156 cut-off events. For 424421/424421 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 74036 event pairs, 3404 based on Foata normal form. 8/14163 useless extension candidates. Maximal degree in co-relation 104033. Up to 13845 conditions per place. [2024-06-20 17:17:56,366 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 238 selfloop transitions, 30 changer transitions 0/273 dead transitions. [2024-06-20 17:17:56,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 273 transitions, 3557 flow [2024-06-20 17:17:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-20 17:17:56,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368131868131868 [2024-06-20 17:17:56,368 INFO L175 Difference]: Start difference. First operand has 133 places, 212 transitions, 2408 flow. Second operand 7 states and 159 transitions. [2024-06-20 17:17:56,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 273 transitions, 3557 flow [2024-06-20 17:17:56,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 273 transitions, 3366 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:56,705 INFO L231 Difference]: Finished difference. Result has 138 places, 231 transitions, 2583 flow [2024-06-20 17:17:56,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2583, PETRI_PLACES=138, PETRI_TRANSITIONS=231} [2024-06-20 17:17:56,706 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-20 17:17:56,706 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 231 transitions, 2583 flow [2024-06-20 17:17:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:56,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:56,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:56,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:17:56,707 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)] === [2024-06-20 17:17:56,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash 858726459, now seen corresponding path program 3 times [2024-06-20 17:17:56,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:56,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603585789] [2024-06-20 17:17:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:56,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:59,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:59,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603585789] [2024-06-20 17:17:59,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603585789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:59,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:59,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:59,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196300686] [2024-06-20 17:17:59,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:59,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:59,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:59,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:59,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:17:59,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 231 transitions, 2583 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:59,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:59,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:17:59,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:03,394 INFO L124 PetriNetUnfolderBase]: 10270/14187 cut-off events. [2024-06-20 17:18:03,394 INFO L125 PetriNetUnfolderBase]: For 456236/456236 co-relation queries the response was YES. [2024-06-20 17:18:03,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108108 conditions, 14187 events. 10270/14187 cut-off events. For 456236/456236 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 74139 event pairs, 3408 based on Foata normal form. 8/14194 useless extension candidates. Maximal degree in co-relation 108045. Up to 13972 conditions per place. [2024-06-20 17:18:03,517 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 242 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-20 17:18:03,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 274 transitions, 3446 flow [2024-06-20 17:18:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-20 17:18:03,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258241758241758 [2024-06-20 17:18:03,519 INFO L175 Difference]: Start difference. First operand has 138 places, 231 transitions, 2583 flow. Second operand 7 states and 155 transitions. [2024-06-20 17:18:03,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 274 transitions, 3446 flow [2024-06-20 17:18:03,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 274 transitions, 3302 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-20 17:18:03,863 INFO L231 Difference]: Finished difference. Result has 144 places, 238 transitions, 2648 flow [2024-06-20 17:18:03,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2648, PETRI_PLACES=144, PETRI_TRANSITIONS=238} [2024-06-20 17:18:03,863 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-20 17:18:03,863 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 238 transitions, 2648 flow [2024-06-20 17:18:03,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:03,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:03,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:03,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:18:03,864 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)] === [2024-06-20 17:18:03,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 858734395, now seen corresponding path program 1 times [2024-06-20 17:18:03,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:03,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054845293] [2024-06-20 17:18:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:03,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:07,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:07,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054845293] [2024-06-20 17:18:07,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054845293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:07,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:07,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:07,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754541821] [2024-06-20 17:18:07,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:07,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:07,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:08,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:18:08,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 238 transitions, 2648 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:08,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:08,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:18:08,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:12,353 INFO L124 PetriNetUnfolderBase]: 10354/14303 cut-off events. [2024-06-20 17:18:12,353 INFO L125 PetriNetUnfolderBase]: For 479981/479981 co-relation queries the response was YES. [2024-06-20 17:18:12,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109432 conditions, 14303 events. 10354/14303 cut-off events. For 479981/479981 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 75144 event pairs, 3403 based on Foata normal form. 16/14318 useless extension candidates. Maximal degree in co-relation 109366. Up to 14004 conditions per place. [2024-06-20 17:18:12,467 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 241 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-20 17:18:12,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 281 transitions, 3503 flow [2024-06-20 17:18:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 17:18:12,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-20 17:18:12,469 INFO L175 Difference]: Start difference. First operand has 144 places, 238 transitions, 2648 flow. Second operand 7 states and 160 transitions. [2024-06-20 17:18:12,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 281 transitions, 3503 flow [2024-06-20 17:18:12,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 281 transitions, 3409 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:12,836 INFO L231 Difference]: Finished difference. Result has 148 places, 241 transitions, 2712 flow [2024-06-20 17:18:12,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2712, PETRI_PLACES=148, PETRI_TRANSITIONS=241} [2024-06-20 17:18:12,837 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-20 17:18:12,837 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 241 transitions, 2712 flow [2024-06-20 17:18:12,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:12,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:12,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:18:12,838 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)] === [2024-06-20 17:18:12,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -32397747, now seen corresponding path program 1 times [2024-06-20 17:18:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966285746] [2024-06-20 17:18:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:16,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966285746] [2024-06-20 17:18:16,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966285746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:16,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:16,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:16,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641494991] [2024-06-20 17:18:16,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:16,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:16,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:16,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:16,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:16,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 241 transitions, 2712 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) [2024-06-20 17:18:16,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:16,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:16,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:20,573 INFO L124 PetriNetUnfolderBase]: 10077/14051 cut-off events. [2024-06-20 17:18:20,574 INFO L125 PetriNetUnfolderBase]: For 519559/519646 co-relation queries the response was YES. [2024-06-20 17:18:20,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110507 conditions, 14051 events. 10077/14051 cut-off events. For 519559/519646 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 74288 event pairs, 3195 based on Foata normal form. 18/14033 useless extension candidates. Maximal degree in co-relation 110439. Up to 13231 conditions per place. [2024-06-20 17:18:20,696 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 244 selfloop transitions, 44 changer transitions 0/309 dead transitions. [2024-06-20 17:18:20,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 309 transitions, 3805 flow [2024-06-20 17:18:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 17:18:20,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495192307692308 [2024-06-20 17:18:20,697 INFO L175 Difference]: Start difference. First operand has 148 places, 241 transitions, 2712 flow. Second operand 8 states and 187 transitions. [2024-06-20 17:18:20,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 309 transitions, 3805 flow [2024-06-20 17:18:21,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 309 transitions, 3685 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:21,051 INFO L231 Difference]: Finished difference. Result has 154 places, 260 transitions, 3051 flow [2024-06-20 17:18:21,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3051, PETRI_PLACES=154, PETRI_TRANSITIONS=260} [2024-06-20 17:18:21,052 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-20 17:18:21,052 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 260 transitions, 3051 flow [2024-06-20 17:18:21,052 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) [2024-06-20 17:18:21,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:21,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:21,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:18:21,053 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)] === [2024-06-20 17:18:21,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1931625509, now seen corresponding path program 2 times [2024-06-20 17:18:21,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:21,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998446889] [2024-06-20 17:18:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:21,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:24,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:24,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998446889] [2024-06-20 17:18:24,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998446889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:24,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:24,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769797079] [2024-06-20 17:18:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:24,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:24,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:24,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:24,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 260 transitions, 3051 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) [2024-06-20 17:18:24,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:24,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:24,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:28,964 INFO L124 PetriNetUnfolderBase]: 10129/14127 cut-off events. [2024-06-20 17:18:28,965 INFO L125 PetriNetUnfolderBase]: For 558164/558255 co-relation queries the response was YES. [2024-06-20 17:18:29,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113756 conditions, 14127 events. 10129/14127 cut-off events. For 558164/558255 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 74773 event pairs, 3445 based on Foata normal form. 22/14113 useless extension candidates. Maximal degree in co-relation 113684. Up to 13463 conditions per place. [2024-06-20 17:18:29,104 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 245 selfloop transitions, 39 changer transitions 0/305 dead transitions. [2024-06-20 17:18:29,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 305 transitions, 3821 flow [2024-06-20 17:18:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 17:18:29,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-20 17:18:29,106 INFO L175 Difference]: Start difference. First operand has 154 places, 260 transitions, 3051 flow. Second operand 8 states and 180 transitions. [2024-06-20 17:18:29,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 305 transitions, 3821 flow [2024-06-20 17:18:29,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 305 transitions, 3689 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-06-20 17:18:29,569 INFO L231 Difference]: Finished difference. Result has 161 places, 263 transitions, 3111 flow [2024-06-20 17:18:29,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2931, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3111, PETRI_PLACES=161, PETRI_TRANSITIONS=263} [2024-06-20 17:18:29,570 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-06-20 17:18:29,570 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 263 transitions, 3111 flow [2024-06-20 17:18:29,570 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) [2024-06-20 17:18:29,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:29,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:29,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:18:29,570 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)] === [2024-06-20 17:18:29,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash -32337173, now seen corresponding path program 1 times [2024-06-20 17:18:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:29,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143097452] [2024-06-20 17:18:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:29,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:33,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:33,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143097452] [2024-06-20 17:18:33,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143097452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:33,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:33,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487139046] [2024-06-20 17:18:33,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:33,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:33,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-20 17:18:33,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 263 transitions, 3111 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:33,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:33,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-20 17:18:33,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:38,058 INFO L124 PetriNetUnfolderBase]: 10865/14983 cut-off events. [2024-06-20 17:18:38,058 INFO L125 PetriNetUnfolderBase]: For 591866/591872 co-relation queries the response was YES. [2024-06-20 17:18:38,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120150 conditions, 14983 events. 10865/14983 cut-off events. For 591866/591872 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 78813 event pairs, 3363 based on Foata normal form. 14/14996 useless extension candidates. Maximal degree in co-relation 120075. Up to 14274 conditions per place. [2024-06-20 17:18:38,199 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 280 selfloop transitions, 69 changer transitions 0/354 dead transitions. [2024-06-20 17:18:38,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 354 transitions, 4811 flow [2024-06-20 17:18:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 17:18:38,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-20 17:18:38,201 INFO L175 Difference]: Start difference. First operand has 161 places, 263 transitions, 3111 flow. Second operand 8 states and 197 transitions. [2024-06-20 17:18:38,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 354 transitions, 4811 flow