./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.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/safe009_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe009_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe009_rmo.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-cde23df-m [2024-06-14 13:02:31,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:02:31,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:02:31,853 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:02:31,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:02:31,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:02:31,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:02:31,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:02:31,895 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:02:31,901 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:02:31,901 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:02:31,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:02:31,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:02:31,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:02:31,904 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:02:31,904 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:02:31,904 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:02:31,905 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:02:31,905 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:02:31,905 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:02:31,905 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:02:31,906 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:02:31,906 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:02:31,906 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:02:31,907 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:02:31,907 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:02:31,907 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:02:31,907 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:02:31,908 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:02:31,908 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:02:31,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:02:31,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:02:31,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:02:31,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:02:31,910 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:02:31,910 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:02:31,911 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:02:31,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:02:31,911 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:02:31,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:02:31,911 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:02:31,912 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:02:31,912 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:02:31,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:02:32,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:02:32,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:02:32,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:02:32,153 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:02:32,154 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:02:32,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe009_rmo.opt.yml/witness.yml [2024-06-14 13:02:32,372 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:02:32,372 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:02:32,374 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i [2024-06-14 13:02:33,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:02:33,455 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:02:33,456 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i [2024-06-14 13:02:33,467 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc06cb4d/443f13d14a284e4ea6896f051c8f24c0/FLAGffe121144 [2024-06-14 13:02:33,840 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc06cb4d/443f13d14a284e4ea6896f051c8f24c0 [2024-06-14 13:02:33,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:02:33,841 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:02:33,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:02:33,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:02:33,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:02:33,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:02:32" (1/2) ... [2024-06-14 13:02:33,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f199606 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:02:33, skipping insertion in model container [2024-06-14 13:02:33,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:02:32" (1/2) ... [2024-06-14 13:02:33,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a941963 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:02:33, skipping insertion in model container [2024-06-14 13:02:33,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:02:33" (2/2) ... [2024-06-14 13:02:33,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f199606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:33, skipping insertion in model container [2024-06-14 13:02:33,848 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:02:33" (2/2) ... [2024-06-14 13:02:33,849 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:02:33,959 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:02:33,960 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-14 13:02:33,960 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! 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_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-14 13:02:33,960 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-14 13:02:33,960 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:02:33,960 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-14 13:02:34,019 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:02:34,372 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:02:34,385 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:02:34,491 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:02:34,515 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:02:34,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34 WrapperNode [2024-06-14 13:02:34,518 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:02:34,519 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:02:34,519 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:02:34,519 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:02:34,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,541 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,589 INFO L138 Inliner]: procedures = 175, calls = 82, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 207 [2024-06-14 13:02:34,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:02:34,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:02:34,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:02:34,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:02:34,607 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,611 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,625 INFO L175 MemorySlicer]: Split 43 memory accesses to 2 slices as follows [2, 41]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-14 13:02:34,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,626 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,636 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,643 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:02:34,643 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:02:34,644 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:02:34,644 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:02:34,644 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (1/1) ... [2024-06-14 13:02:34,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:02:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:02:34,678 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) [2024-06-14 13:02:34,686 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 [2024-06-14 13:02:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:02:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:02:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:02:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:02:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:02:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:02:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:02:34,707 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:02:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:02:34,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:02:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:02:34,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:02:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:02:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:02:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:02:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:02:34,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:02:34,710 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:02:34,852 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:02:34,853 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:02:35,258 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:02:35,258 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:02:35,536 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:02:35,536 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:02:35,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:02:35 BoogieIcfgContainer [2024-06-14 13:02:35,537 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:02:35,540 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:02:35,540 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:02:35,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:02:35,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:02:32" (1/4) ... [2024-06-14 13:02:35,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a89608 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:02:35, skipping insertion in model container [2024-06-14 13:02:35,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:02:33" (2/4) ... [2024-06-14 13:02:35,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a89608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:02:35, skipping insertion in model container [2024-06-14 13:02:35,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:02:34" (3/4) ... [2024-06-14 13:02:35,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a89608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:02:35, skipping insertion in model container [2024-06-14 13:02:35,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:02:35" (4/4) ... [2024-06-14 13:02:35,546 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.opt.i [2024-06-14 13:02:35,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:02:35,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:02:35,595 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:02:35,646 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:02:35,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:02:35,709 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 13:02:35,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:02:35,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:02:35,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:02:35,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 13:02:35,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:02:35,779 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;@3067eaa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:02:35,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:02:35,784 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:02:35,785 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:02:35,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:02:35,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:35,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:02:35,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:35,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash 803318347, now seen corresponding path program 1 times [2024-06-14 13:02:35,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:35,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519783367] [2024-06-14 13:02:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:38,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:38,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519783367] [2024-06-14 13:02:38,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519783367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:38,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:38,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:02:38,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143275865] [2024-06-14 13:02:38,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:38,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:02:38,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:02:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:02:38,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:02:38,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:38,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:38,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:02:38,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:38,585 INFO L124 PetriNetUnfolderBase]: 1205/1834 cut-off events. [2024-06-14 13:02:38,585 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 13:02:38,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 1834 events. 1205/1834 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8372 event pairs, 800 based on Foata normal form. 1/1801 useless extension candidates. Maximal degree in co-relation 3726. Up to 1818 conditions per place. [2024-06-14 13:02:38,596 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 13:02:38,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 187 flow [2024-06-14 13:02:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:02:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:02:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-06-14 13:02:38,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 13:02:38,606 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 65 transitions. [2024-06-14 13:02:38,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 187 flow [2024-06-14 13:02:38,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:02:38,610 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 13:02:38,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 13:02:38,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 13:02:38,614 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 13:02:38,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:38,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:38,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:38,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:02:38,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:38,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:38,615 INFO L85 PathProgramCache]: Analyzing trace with hash 100510269, now seen corresponding path program 1 times [2024-06-14 13:02:38,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:38,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842607147] [2024-06-14 13:02:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842607147] [2024-06-14 13:02:41,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842607147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:41,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:41,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:02:41,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655985085] [2024-06-14 13:02:41,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:41,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:02:41,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:02:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:02:41,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:02:41,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:41,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:41,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:02:41,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:42,081 INFO L124 PetriNetUnfolderBase]: 1454/2200 cut-off events. [2024-06-14 13:02:42,081 INFO L125 PetriNetUnfolderBase]: For 387/391 co-relation queries the response was YES. [2024-06-14 13:02:42,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5060 conditions, 2200 events. 1454/2200 cut-off events. For 387/391 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9875 event pairs, 628 based on Foata normal form. 10/2210 useless extension candidates. Maximal degree in co-relation 5045. Up to 2126 conditions per place. [2024-06-14 13:02:42,091 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-14 13:02:42,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 272 flow [2024-06-14 13:02:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:02:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:02:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-06-14 13:02:42,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-14 13:02:42,093 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 83 transitions. [2024-06-14 13:02:42,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 272 flow [2024-06-14 13:02:42,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:02:42,095 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 13:02:42,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 13:02:42,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 13:02:42,096 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 13:02:42,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:42,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:42,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:42,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:02:42,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:42,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash 493615162, now seen corresponding path program 1 times [2024-06-14 13:02:42,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:42,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054266037] [2024-06-14 13:02:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:42,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:46,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:46,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054266037] [2024-06-14 13:02:46,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054266037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:46,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:46,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:02:46,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496803105] [2024-06-14 13:02:46,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:02:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:02:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:02:46,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:02:46,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:46,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:46,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:02:46,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:46,935 INFO L124 PetriNetUnfolderBase]: 1445/2185 cut-off events. [2024-06-14 13:02:46,935 INFO L125 PetriNetUnfolderBase]: For 1101/1109 co-relation queries the response was YES. [2024-06-14 13:02:46,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5566 conditions, 2185 events. 1445/2185 cut-off events. For 1101/1109 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9805 event pairs, 483 based on Foata normal form. 14/2199 useless extension candidates. Maximal degree in co-relation 5549. Up to 2073 conditions per place. [2024-06-14 13:02:46,947 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 54 selfloop transitions, 9 changer transitions 0/66 dead transitions. [2024-06-14 13:02:46,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 332 flow [2024-06-14 13:02:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:02:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:02:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-14 13:02:46,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-14 13:02:46,952 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 96 transitions. [2024-06-14 13:02:46,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 332 flow [2024-06-14 13:02:46,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 318 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:02:46,956 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 159 flow [2024-06-14 13:02:46,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-14 13:02:46,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-14 13:02:46,957 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 159 flow [2024-06-14 13:02:46,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:46,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:46,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:46,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:02:46,958 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:46,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:46,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1792055505, now seen corresponding path program 1 times [2024-06-14 13:02:46,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:46,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179089808] [2024-06-14 13:02:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:46,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:48,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:48,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179089808] [2024-06-14 13:02:48,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179089808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:48,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:48,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:02:48,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198022029] [2024-06-14 13:02:48,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:02:48,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:02:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:02:48,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:02:48,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:48,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:48,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:02:48,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:49,409 INFO L124 PetriNetUnfolderBase]: 1179/1794 cut-off events. [2024-06-14 13:02:49,409 INFO L125 PetriNetUnfolderBase]: For 1667/1667 co-relation queries the response was YES. [2024-06-14 13:02:49,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4954 conditions, 1794 events. 1179/1794 cut-off events. For 1667/1667 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8068 event pairs, 604 based on Foata normal form. 2/1795 useless extension candidates. Maximal degree in co-relation 4936. Up to 1767 conditions per place. [2024-06-14 13:02:49,418 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-14 13:02:49,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 313 flow [2024-06-14 13:02:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:02:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:02:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-14 13:02:49,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:02:49,422 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 159 flow. Second operand 5 states and 85 transitions. [2024-06-14 13:02:49,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 313 flow [2024-06-14 13:02:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 290 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:02:49,426 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 180 flow [2024-06-14 13:02:49,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-14 13:02:49,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-14 13:02:49,428 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 180 flow [2024-06-14 13:02:49,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:49,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:49,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:49,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:02:49,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:49,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 300518278, now seen corresponding path program 1 times [2024-06-14 13:02:49,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:49,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587802383] [2024-06-14 13:02:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:49,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587802383] [2024-06-14 13:02:51,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587802383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:51,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:51,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:02:51,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909027489] [2024-06-14 13:02:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:51,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:02:51,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:51,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:02:51,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:02:51,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:02:51,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:51,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:51,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:02:51,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:52,483 INFO L124 PetriNetUnfolderBase]: 1453/2195 cut-off events. [2024-06-14 13:02:52,483 INFO L125 PetriNetUnfolderBase]: For 2939/2939 co-relation queries the response was YES. [2024-06-14 13:02:52,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6411 conditions, 2195 events. 1453/2195 cut-off events. For 2939/2939 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9819 event pairs, 632 based on Foata normal form. 8/2203 useless extension candidates. Maximal degree in co-relation 6391. Up to 2077 conditions per place. [2024-06-14 13:02:52,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2024-06-14 13:02:52,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 485 flow [2024-06-14 13:02:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:02:52,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:02:52,495 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 180 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:02:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 485 flow [2024-06-14 13:02:52,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 84 transitions, 454 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:02:52,498 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 277 flow [2024-06-14 13:02:52,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2024-06-14 13:02:52,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-14 13:02:52,499 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 277 flow [2024-06-14 13:02:52,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:52,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:52,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:52,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:02:52,500 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:52,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1787055559, now seen corresponding path program 1 times [2024-06-14 13:02:52,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:52,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725640786] [2024-06-14 13:02:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:52,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:54,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725640786] [2024-06-14 13:02:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725640786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015661987] [2024-06-14 13:02:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:55,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:02:55,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 277 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:55,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:55,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:02:55,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:56,088 INFO L124 PetriNetUnfolderBase]: 1479/2237 cut-off events. [2024-06-14 13:02:56,088 INFO L125 PetriNetUnfolderBase]: For 4752/4770 co-relation queries the response was YES. [2024-06-14 13:02:56,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7466 conditions, 2237 events. 1479/2237 cut-off events. For 4752/4770 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10065 event pairs, 535 based on Foata normal form. 19/2256 useless extension candidates. Maximal degree in co-relation 7443. Up to 2077 conditions per place. [2024-06-14 13:02:56,100 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 71 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-06-14 13:02:56,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 591 flow [2024-06-14 13:02:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:02:56,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:02:56,102 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 277 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:02:56,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 591 flow [2024-06-14 13:02:56,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 581 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 13:02:56,107 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 359 flow [2024-06-14 13:02:56,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2024-06-14 13:02:56,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-14 13:02:56,108 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 359 flow [2024-06-14 13:02:56,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:56,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:56,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:02:56,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:56,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash -798478409, now seen corresponding path program 1 times [2024-06-14 13:02:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:56,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049929106] [2024-06-14 13:02:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:58,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:58,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049929106] [2024-06-14 13:02:58,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049929106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:58,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:58,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862410003] [2024-06-14 13:02:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:58,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:58,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:02:58,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 359 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:58,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:58,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:02:58,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:00,006 INFO L124 PetriNetUnfolderBase]: 1597/2401 cut-off events. [2024-06-14 13:03:00,006 INFO L125 PetriNetUnfolderBase]: For 6779/6787 co-relation queries the response was YES. [2024-06-14 13:03:00,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8623 conditions, 2401 events. 1597/2401 cut-off events. For 6779/6787 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10851 event pairs, 582 based on Foata normal form. 16/2417 useless extension candidates. Maximal degree in co-relation 8597. Up to 2153 conditions per place. [2024-06-14 13:03:00,024 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 68 selfloop transitions, 32 changer transitions 0/103 dead transitions. [2024-06-14 13:03:00,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 727 flow [2024-06-14 13:03:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:03:00,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 13:03:00,026 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 359 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:03:00,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 727 flow [2024-06-14 13:03:00,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 700 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:03:00,035 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 528 flow [2024-06-14 13:03:00,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=528, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2024-06-14 13:03:00,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-14 13:03:00,037 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 528 flow [2024-06-14 13:03:00,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:00,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:00,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:00,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:03:00,037 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:00,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:00,038 INFO L85 PathProgramCache]: Analyzing trace with hash -799141685, now seen corresponding path program 2 times [2024-06-14 13:03:00,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:00,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188668831] [2024-06-14 13:03:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:02,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:02,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188668831] [2024-06-14 13:03:02,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188668831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:02,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:02,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:03:02,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736395595] [2024-06-14 13:03:02,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:03:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:02,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:03:02,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:03:02,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:02,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:02,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:02,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:02,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:03,047 INFO L124 PetriNetUnfolderBase]: 1587/2387 cut-off events. [2024-06-14 13:03:03,048 INFO L125 PetriNetUnfolderBase]: For 9475/9483 co-relation queries the response was YES. [2024-06-14 13:03:03,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9675 conditions, 2387 events. 1587/2387 cut-off events. For 9475/9483 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10704 event pairs, 649 based on Foata normal form. 12/2399 useless extension candidates. Maximal degree in co-relation 9645. Up to 2301 conditions per place. [2024-06-14 13:03:03,058 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 79 selfloop transitions, 13 changer transitions 0/95 dead transitions. [2024-06-14 13:03:03,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 760 flow [2024-06-14 13:03:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:03:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:03:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 13:03:03,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:03:03,063 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 528 flow. Second operand 6 states and 98 transitions. [2024-06-14 13:03:03,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 760 flow [2024-06-14 13:03:03,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 95 transitions, 721 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:03,075 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 523 flow [2024-06-14 13:03:03,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=523, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-14 13:03:03,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-14 13:03:03,076 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 523 flow [2024-06-14 13:03:03,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:03,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:03,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:03:03,077 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:03,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1035313221, now seen corresponding path program 2 times [2024-06-14 13:03:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:03,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001100602] [2024-06-14 13:03:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:03,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:05,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001100602] [2024-06-14 13:03:05,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001100602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:05,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:05,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:03:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648787841] [2024-06-14 13:03:05,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:03:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:03:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:03:05,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:05,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 523 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:05,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:05,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:05,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:06,405 INFO L124 PetriNetUnfolderBase]: 1637/2457 cut-off events. [2024-06-14 13:03:06,405 INFO L125 PetriNetUnfolderBase]: For 10876/10882 co-relation queries the response was YES. [2024-06-14 13:03:06,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10085 conditions, 2457 events. 1637/2457 cut-off events. For 10876/10882 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11137 event pairs, 587 based on Foata normal form. 14/2471 useless extension candidates. Maximal degree in co-relation 10053. Up to 2059 conditions per place. [2024-06-14 13:03:06,417 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 78 selfloop transitions, 42 changer transitions 0/123 dead transitions. [2024-06-14 13:03:06,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 123 transitions, 1001 flow [2024-06-14 13:03:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:03:06,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 13:03:06,419 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 523 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:03:06,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 123 transitions, 1001 flow [2024-06-14 13:03:06,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 953 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:06,429 INFO L231 Difference]: Finished difference. Result has 75 places, 89 transitions, 732 flow [2024-06-14 13:03:06,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=732, PETRI_PLACES=75, PETRI_TRANSITIONS=89} [2024-06-14 13:03:06,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-14 13:03:06,430 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 89 transitions, 732 flow [2024-06-14 13:03:06,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:06,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:06,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:06,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:03:06,431 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:06,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash -680048327, now seen corresponding path program 1 times [2024-06-14 13:03:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:06,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012206164] [2024-06-14 13:03:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:06,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:09,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:09,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012206164] [2024-06-14 13:03:09,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012206164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:09,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:09,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724812807] [2024-06-14 13:03:09,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:09,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:09,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:09,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:09,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 89 transitions, 732 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:09,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:09,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:09,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:10,621 INFO L124 PetriNetUnfolderBase]: 1689/2539 cut-off events. [2024-06-14 13:03:10,621 INFO L125 PetriNetUnfolderBase]: For 13132/13132 co-relation queries the response was YES. [2024-06-14 13:03:10,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11122 conditions, 2539 events. 1689/2539 cut-off events. For 13132/13132 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11613 event pairs, 594 based on Foata normal form. 16/2555 useless extension candidates. Maximal degree in co-relation 11087. Up to 2327 conditions per place. [2024-06-14 13:03:10,653 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-14 13:03:10,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 1148 flow [2024-06-14 13:03:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:03:10,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-14 13:03:10,656 INFO L175 Difference]: Start difference. First operand has 75 places, 89 transitions, 732 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:03:10,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 1148 flow [2024-06-14 13:03:10,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 1102 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-14 13:03:10,681 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 760 flow [2024-06-14 13:03:10,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=760, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-14 13:03:10,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-14 13:03:10,682 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 760 flow [2024-06-14 13:03:10,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:10,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:10,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:10,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:03:10,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:10,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -814122710, now seen corresponding path program 1 times [2024-06-14 13:03:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:10,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696788217] [2024-06-14 13:03:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:10,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:13,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:13,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696788217] [2024-06-14 13:03:13,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696788217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:13,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:13,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:13,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082966393] [2024-06-14 13:03:13,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:13,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:13,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:13,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 760 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:13,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:13,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:13,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:14,952 INFO L124 PetriNetUnfolderBase]: 2093/3111 cut-off events. [2024-06-14 13:03:14,953 INFO L125 PetriNetUnfolderBase]: For 16288/16314 co-relation queries the response was YES. [2024-06-14 13:03:14,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13165 conditions, 3111 events. 2093/3111 cut-off events. For 16288/16314 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14580 event pairs, 479 based on Foata normal form. 39/3150 useless extension candidates. Maximal degree in co-relation 13127. Up to 2321 conditions per place. [2024-06-14 13:03:14,968 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 113 selfloop transitions, 45 changer transitions 0/161 dead transitions. [2024-06-14 13:03:14,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 161 transitions, 1392 flow [2024-06-14 13:03:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:03:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:03:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:03:14,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:03:14,970 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 760 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:03:14,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 161 transitions, 1392 flow [2024-06-14 13:03:14,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 161 transitions, 1344 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:14,987 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 931 flow [2024-06-14 13:03:14,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=931, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2024-06-14 13:03:14,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-14 13:03:14,988 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 931 flow [2024-06-14 13:03:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:14,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:14,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:14,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:03:14,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:14,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1016969356, now seen corresponding path program 2 times [2024-06-14 13:03:14,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:14,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125972638] [2024-06-14 13:03:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:14,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:17,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:17,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125972638] [2024-06-14 13:03:17,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125972638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:17,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:17,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:17,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846547058] [2024-06-14 13:03:17,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:17,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:17,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:17,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:17,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 931 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:17,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:17,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:17,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:18,832 INFO L124 PetriNetUnfolderBase]: 2201/3265 cut-off events. [2024-06-14 13:03:18,833 INFO L125 PetriNetUnfolderBase]: For 21348/21356 co-relation queries the response was YES. [2024-06-14 13:03:18,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15090 conditions, 3265 events. 2201/3265 cut-off events. For 21348/21356 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15393 event pairs, 667 based on Foata normal form. 24/3289 useless extension candidates. Maximal degree in co-relation 15049. Up to 2685 conditions per place. [2024-06-14 13:03:18,848 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 113 selfloop transitions, 38 changer transitions 0/154 dead transitions. [2024-06-14 13:03:18,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 154 transitions, 1506 flow [2024-06-14 13:03:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:03:18,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:03:18,850 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 931 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:03:18,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 154 transitions, 1506 flow [2024-06-14 13:03:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1401 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:18,871 INFO L231 Difference]: Finished difference. Result has 93 places, 110 transitions, 1005 flow [2024-06-14 13:03:18,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1005, PETRI_PLACES=93, PETRI_TRANSITIONS=110} [2024-06-14 13:03:18,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-14 13:03:18,872 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 110 transitions, 1005 flow [2024-06-14 13:03:18,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:18,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:18,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:18,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:03:18,872 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:18,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash 996419146, now seen corresponding path program 3 times [2024-06-14 13:03:18,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:18,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727766344] [2024-06-14 13:03:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:18,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:21,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727766344] [2024-06-14 13:03:21,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727766344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:21,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:21,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:21,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764867347] [2024-06-14 13:03:21,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:21,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:21,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:21,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:21,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 110 transitions, 1005 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:21,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:21,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:21,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:23,104 INFO L124 PetriNetUnfolderBase]: 2237/3317 cut-off events. [2024-06-14 13:03:23,105 INFO L125 PetriNetUnfolderBase]: For 24035/24043 co-relation queries the response was YES. [2024-06-14 13:03:23,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15651 conditions, 3317 events. 2237/3317 cut-off events. For 24035/24043 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15687 event pairs, 633 based on Foata normal form. 24/3341 useless extension candidates. Maximal degree in co-relation 15607. Up to 2713 conditions per place. [2024-06-14 13:03:23,128 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 46 changer transitions 0/167 dead transitions. [2024-06-14 13:03:23,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 167 transitions, 1569 flow [2024-06-14 13:03:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:03:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:03:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:03:23,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-14 13:03:23,131 INFO L175 Difference]: Start difference. First operand has 93 places, 110 transitions, 1005 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:03:23,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 167 transitions, 1569 flow [2024-06-14 13:03:23,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 167 transitions, 1506 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:23,164 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 1095 flow [2024-06-14 13:03:23,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1095, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-14 13:03:23,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-14 13:03:23,165 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 1095 flow [2024-06-14 13:03:23,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:23,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:23,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:23,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:03:23,166 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:23,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash 393063414, now seen corresponding path program 4 times [2024-06-14 13:03:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:23,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283910374] [2024-06-14 13:03:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:23,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:26,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:26,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283910374] [2024-06-14 13:03:26,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283910374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:26,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:26,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101494762] [2024-06-14 13:03:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:26,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:26,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:26,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 1095 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:26,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:26,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:26,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:27,683 INFO L124 PetriNetUnfolderBase]: 2433/3589 cut-off events. [2024-06-14 13:03:27,683 INFO L125 PetriNetUnfolderBase]: For 28642/28650 co-relation queries the response was YES. [2024-06-14 13:03:27,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17319 conditions, 3589 events. 2433/3589 cut-off events. For 28642/28650 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17068 event pairs, 625 based on Foata normal form. 24/3613 useless extension candidates. Maximal degree in co-relation 17273. Up to 2549 conditions per place. [2024-06-14 13:03:27,700 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 67 changer transitions 0/185 dead transitions. [2024-06-14 13:03:27,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 185 transitions, 1823 flow [2024-06-14 13:03:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:03:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:03:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:03:27,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 13:03:27,702 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 1095 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:03:27,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 185 transitions, 1823 flow [2024-06-14 13:03:27,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 185 transitions, 1709 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:03:27,729 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 1258 flow [2024-06-14 13:03:27,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1258, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-06-14 13:03:27,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-14 13:03:27,730 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 1258 flow [2024-06-14 13:03:27,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:27,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:27,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:27,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:03:27,731 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:27,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1966948381, now seen corresponding path program 1 times [2024-06-14 13:03:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:27,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691580882] [2024-06-14 13:03:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:27,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:28,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:28,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691580882] [2024-06-14 13:03:28,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691580882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:28,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:28,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:03:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390960473] [2024-06-14 13:03:28,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:28,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:03:28,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:03:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:03:28,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:28,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 1258 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:28,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:28,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:28,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:29,833 INFO L124 PetriNetUnfolderBase]: 2427/3579 cut-off events. [2024-06-14 13:03:29,833 INFO L125 PetriNetUnfolderBase]: For 31870/31870 co-relation queries the response was YES. [2024-06-14 13:03:29,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18198 conditions, 3579 events. 2427/3579 cut-off events. For 31870/31870 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17238 event pairs, 897 based on Foata normal form. 2/3581 useless extension candidates. Maximal degree in co-relation 18150. Up to 3558 conditions per place. [2024-06-14 13:03:29,853 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 126 selfloop transitions, 8 changer transitions 0/137 dead transitions. [2024-06-14 13:03:29,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1559 flow [2024-06-14 13:03:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:03:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:03:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-06-14 13:03:29,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-14 13:03:29,854 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 1258 flow. Second operand 5 states and 77 transitions. [2024-06-14 13:03:29,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1559 flow [2024-06-14 13:03:29,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 137 transitions, 1436 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:29,890 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1170 flow [2024-06-14 13:03:29,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1170, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2024-06-14 13:03:29,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-14 13:03:29,891 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1170 flow [2024-06-14 13:03:29,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:29,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:29,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:29,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:03:29,891 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:29,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash 529139902, now seen corresponding path program 1 times [2024-06-14 13:03:29,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:29,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246226036] [2024-06-14 13:03:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:29,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246226036] [2024-06-14 13:03:32,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246226036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:32,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:32,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:32,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340665396] [2024-06-14 13:03:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:32,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:32,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:32,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:32,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1170 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:32,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:32,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:32,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:33,799 INFO L124 PetriNetUnfolderBase]: 2447/3615 cut-off events. [2024-06-14 13:03:33,799 INFO L125 PetriNetUnfolderBase]: For 33765/33792 co-relation queries the response was YES. [2024-06-14 13:03:33,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18155 conditions, 3615 events. 2447/3615 cut-off events. For 33765/33792 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17440 event pairs, 649 based on Foata normal form. 27/3642 useless extension candidates. Maximal degree in co-relation 18104. Up to 3361 conditions per place. [2024-06-14 13:03:33,816 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 137 selfloop transitions, 23 changer transitions 0/163 dead transitions. [2024-06-14 13:03:33,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 163 transitions, 1702 flow [2024-06-14 13:03:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:03:33,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 13:03:33,818 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1170 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:03:33,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 163 transitions, 1702 flow [2024-06-14 13:03:33,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 163 transitions, 1684 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:33,850 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1289 flow [2024-06-14 13:03:33,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1289, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2024-06-14 13:03:33,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-14 13:03:33,851 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1289 flow [2024-06-14 13:03:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:33,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:33,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:33,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:03:33,852 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:33,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1006730396, now seen corresponding path program 2 times [2024-06-14 13:03:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:33,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996144113] [2024-06-14 13:03:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:33,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:36,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:36,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996144113] [2024-06-14 13:03:36,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996144113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:36,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:36,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:36,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885877076] [2024-06-14 13:03:36,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:36,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:36,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:36,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:36,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:36,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1289 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:36,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:36,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:36,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:37,845 INFO L124 PetriNetUnfolderBase]: 2467/3647 cut-off events. [2024-06-14 13:03:37,845 INFO L125 PetriNetUnfolderBase]: For 38534/38561 co-relation queries the response was YES. [2024-06-14 13:03:37,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18820 conditions, 3647 events. 2467/3647 cut-off events. For 38534/38561 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17590 event pairs, 753 based on Foata normal form. 27/3674 useless extension candidates. Maximal degree in co-relation 18768. Up to 3471 conditions per place. [2024-06-14 13:03:37,865 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 140 selfloop transitions, 20 changer transitions 0/163 dead transitions. [2024-06-14 13:03:37,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 163 transitions, 1727 flow [2024-06-14 13:03:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:03:37,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 13:03:37,867 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1289 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:03:37,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 163 transitions, 1727 flow [2024-06-14 13:03:37,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 163 transitions, 1647 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:37,914 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1304 flow [2024-06-14 13:03:37,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1304, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-14 13:03:37,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-14 13:03:37,914 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1304 flow [2024-06-14 13:03:37,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:37,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:37,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:37,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:03:37,915 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:37,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1461276060, now seen corresponding path program 3 times [2024-06-14 13:03:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:37,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668731731] [2024-06-14 13:03:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:37,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:40,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:40,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668731731] [2024-06-14 13:03:40,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668731731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:40,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:40,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:40,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869431197] [2024-06-14 13:03:40,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:40,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:40,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:40,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1304 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:40,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:40,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:40,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:42,044 INFO L124 PetriNetUnfolderBase]: 2459/3633 cut-off events. [2024-06-14 13:03:42,044 INFO L125 PetriNetUnfolderBase]: For 40775/40783 co-relation queries the response was YES. [2024-06-14 13:03:42,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18804 conditions, 3633 events. 2459/3633 cut-off events. For 40775/40783 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17607 event pairs, 893 based on Foata normal form. 12/3645 useless extension candidates. Maximal degree in co-relation 18750. Up to 3525 conditions per place. [2024-06-14 13:03:42,066 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 139 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2024-06-14 13:03:42,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 1676 flow [2024-06-14 13:03:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:03:42,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:03:42,068 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1304 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:03:42,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 1676 flow [2024-06-14 13:03:42,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 158 transitions, 1593 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:42,119 INFO L231 Difference]: Finished difference. Result has 112 places, 132 transitions, 1260 flow [2024-06-14 13:03:42,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1260, PETRI_PLACES=112, PETRI_TRANSITIONS=132} [2024-06-14 13:03:42,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-14 13:03:42,120 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 132 transitions, 1260 flow [2024-06-14 13:03:42,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:42,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:42,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:42,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:03:42,120 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:42,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash 824231268, now seen corresponding path program 1 times [2024-06-14 13:03:42,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:42,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291287096] [2024-06-14 13:03:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:42,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:44,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:44,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291287096] [2024-06-14 13:03:44,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291287096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:44,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:44,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:44,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934936642] [2024-06-14 13:03:44,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:44,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:44,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:44,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 132 transitions, 1260 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:44,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:44,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:44,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:46,437 INFO L124 PetriNetUnfolderBase]: 2539/3761 cut-off events. [2024-06-14 13:03:46,437 INFO L125 PetriNetUnfolderBase]: For 46189/46197 co-relation queries the response was YES. [2024-06-14 13:03:46,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19417 conditions, 3761 events. 2539/3761 cut-off events. For 46189/46197 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18219 event pairs, 692 based on Foata normal form. 24/3785 useless extension candidates. Maximal degree in co-relation 19362. Up to 3330 conditions per place. [2024-06-14 13:03:46,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 37 changer transitions 0/173 dead transitions. [2024-06-14 13:03:46,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1808 flow [2024-06-14 13:03:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:03:46,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 13:03:46,477 INFO L175 Difference]: Start difference. First operand has 112 places, 132 transitions, 1260 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:03:46,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1808 flow [2024-06-14 13:03:46,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 173 transitions, 1764 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:46,524 INFO L231 Difference]: Finished difference. Result has 115 places, 134 transitions, 1342 flow [2024-06-14 13:03:46,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1342, PETRI_PLACES=115, PETRI_TRANSITIONS=134} [2024-06-14 13:03:46,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-14 13:03:46,525 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 134 transitions, 1342 flow [2024-06-14 13:03:46,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:46,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:46,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:46,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:03:46,526 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:46,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1496110828, now seen corresponding path program 2 times [2024-06-14 13:03:46,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:46,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376149171] [2024-06-14 13:03:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:46,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:50,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:50,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376149171] [2024-06-14 13:03:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376149171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:50,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:50,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:50,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528879688] [2024-06-14 13:03:50,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:50,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:50,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:50,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:50,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 134 transitions, 1342 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:50,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:50,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:50,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:51,751 INFO L124 PetriNetUnfolderBase]: 2619/3889 cut-off events. [2024-06-14 13:03:51,752 INFO L125 PetriNetUnfolderBase]: For 52229/52237 co-relation queries the response was YES. [2024-06-14 13:03:51,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20639 conditions, 3889 events. 2619/3889 cut-off events. For 52229/52237 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19062 event pairs, 655 based on Foata normal form. 24/3913 useless extension candidates. Maximal degree in co-relation 20583. Up to 3404 conditions per place. [2024-06-14 13:03:51,774 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 44 changer transitions 0/181 dead transitions. [2024-06-14 13:03:51,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 181 transitions, 1964 flow [2024-06-14 13:03:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:03:51,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:03:51,776 INFO L175 Difference]: Start difference. First operand has 115 places, 134 transitions, 1342 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:03:51,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 181 transitions, 1964 flow [2024-06-14 13:03:51,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 181 transitions, 1870 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:51,825 INFO L231 Difference]: Finished difference. Result has 116 places, 136 transitions, 1388 flow [2024-06-14 13:03:51,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1388, PETRI_PLACES=116, PETRI_TRANSITIONS=136} [2024-06-14 13:03:51,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-14 13:03:51,826 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 136 transitions, 1388 flow [2024-06-14 13:03:51,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:51,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:51,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:51,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:03:51,827 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:51,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1487770588, now seen corresponding path program 3 times [2024-06-14 13:03:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:51,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450610718] [2024-06-14 13:03:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:55,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:55,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450610718] [2024-06-14 13:03:55,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450610718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:55,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:55,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063361494] [2024-06-14 13:03:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:55,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:55,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:55,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:03:55,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 136 transitions, 1388 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:55,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:55,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:03:55,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:57,061 INFO L124 PetriNetUnfolderBase]: 2743/4081 cut-off events. [2024-06-14 13:03:57,061 INFO L125 PetriNetUnfolderBase]: For 59350/59358 co-relation queries the response was YES. [2024-06-14 13:03:57,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21906 conditions, 4081 events. 2743/4081 cut-off events. For 59350/59358 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20363 event pairs, 641 based on Foata normal form. 24/4105 useless extension candidates. Maximal degree in co-relation 21849. Up to 3200 conditions per place. [2024-06-14 13:03:57,087 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-14 13:03:57,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 189 transitions, 2112 flow [2024-06-14 13:03:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:03:57,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:03:57,089 INFO L175 Difference]: Start difference. First operand has 116 places, 136 transitions, 1388 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:03:57,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 189 transitions, 2112 flow [2024-06-14 13:03:57,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 189 transitions, 1994 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:57,154 INFO L231 Difference]: Finished difference. Result has 118 places, 139 transitions, 1437 flow [2024-06-14 13:03:57,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1437, PETRI_PLACES=118, PETRI_TRANSITIONS=139} [2024-06-14 13:03:57,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-14 13:03:57,155 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 139 transitions, 1437 flow [2024-06-14 13:03:57,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:57,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:57,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:57,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:03:57,156 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:57,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:57,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2003424845, now seen corresponding path program 1 times [2024-06-14 13:03:57,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:57,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615978012] [2024-06-14 13:03:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:57,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:00,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:00,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615978012] [2024-06-14 13:04:00,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615978012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:00,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:00,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118409233] [2024-06-14 13:04:00,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:00,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:00,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:00,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:00,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:00,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 139 transitions, 1437 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:00,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:00,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:00,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:02,998 INFO L124 PetriNetUnfolderBase]: 3847/5847 cut-off events. [2024-06-14 13:04:02,998 INFO L125 PetriNetUnfolderBase]: For 110507/110534 co-relation queries the response was YES. [2024-06-14 13:04:03,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31581 conditions, 5847 events. 3847/5847 cut-off events. For 110507/110534 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32136 event pairs, 817 based on Foata normal form. 87/5934 useless extension candidates. Maximal degree in co-relation 31523. Up to 2728 conditions per place. [2024-06-14 13:04:03,028 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 55 changer transitions 0/225 dead transitions. [2024-06-14 13:04:03,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 225 transitions, 2443 flow [2024-06-14 13:04:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 13:04:03,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 13:04:03,030 INFO L175 Difference]: Start difference. First operand has 118 places, 139 transitions, 1437 flow. Second operand 10 states and 200 transitions. [2024-06-14 13:04:03,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 225 transitions, 2443 flow [2024-06-14 13:04:03,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 225 transitions, 2350 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:03,134 INFO L231 Difference]: Finished difference. Result has 126 places, 142 transitions, 1556 flow [2024-06-14 13:04:03,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1556, PETRI_PLACES=126, PETRI_TRANSITIONS=142} [2024-06-14 13:04:03,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-14 13:04:03,135 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 142 transitions, 1556 flow [2024-06-14 13:04:03,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:03,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:03,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:03,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:04:03,135 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:03,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1226982349, now seen corresponding path program 2 times [2024-06-14 13:04:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:03,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340239473] [2024-06-14 13:04:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:03,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340239473] [2024-06-14 13:04:06,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340239473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:06,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:06,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:06,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916819312] [2024-06-14 13:04:06,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:06,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:06,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:06,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 142 transitions, 1556 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:06,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:06,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:06,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:09,225 INFO L124 PetriNetUnfolderBase]: 4203/6443 cut-off events. [2024-06-14 13:04:09,225 INFO L125 PetriNetUnfolderBase]: For 132627/132654 co-relation queries the response was YES. [2024-06-14 13:04:09,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34800 conditions, 6443 events. 4203/6443 cut-off events. For 132627/132654 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 36534 event pairs, 1213 based on Foata normal form. 103/6546 useless extension candidates. Maximal degree in co-relation 34738. Up to 4906 conditions per place. [2024-06-14 13:04:09,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 154 selfloop transitions, 55 changer transitions 0/212 dead transitions. [2024-06-14 13:04:09,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 212 transitions, 2316 flow [2024-06-14 13:04:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:04:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:04:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-14 13:04:09,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-14 13:04:09,276 INFO L175 Difference]: Start difference. First operand has 126 places, 142 transitions, 1556 flow. Second operand 11 states and 200 transitions. [2024-06-14 13:04:09,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 212 transitions, 2316 flow [2024-06-14 13:04:09,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 212 transitions, 2196 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:09,415 INFO L231 Difference]: Finished difference. Result has 131 places, 143 transitions, 1592 flow [2024-06-14 13:04:09,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1592, PETRI_PLACES=131, PETRI_TRANSITIONS=143} [2024-06-14 13:04:09,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-14 13:04:09,432 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 143 transitions, 1592 flow [2024-06-14 13:04:09,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:09,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:09,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:09,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:04:09,433 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:09,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1143869179, now seen corresponding path program 3 times [2024-06-14 13:04:09,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:09,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072637010] [2024-06-14 13:04:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:09,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:13,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072637010] [2024-06-14 13:04:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072637010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:13,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:13,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:13,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441034085] [2024-06-14 13:04:13,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:13,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:13,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:13,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:13,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 143 transitions, 1592 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:13,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:13,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:13,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:15,860 INFO L124 PetriNetUnfolderBase]: 4851/7487 cut-off events. [2024-06-14 13:04:15,860 INFO L125 PetriNetUnfolderBase]: For 155105/155132 co-relation queries the response was YES. [2024-06-14 13:04:15,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40261 conditions, 7487 events. 4851/7487 cut-off events. For 155105/155132 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 44232 event pairs, 1431 based on Foata normal form. 87/7574 useless extension candidates. Maximal degree in co-relation 40198. Up to 4796 conditions per place. [2024-06-14 13:04:15,904 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 55 changer transitions 0/225 dead transitions. [2024-06-14 13:04:15,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 225 transitions, 2496 flow [2024-06-14 13:04:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:04:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:04:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-14 13:04:15,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:04:15,906 INFO L175 Difference]: Start difference. First operand has 131 places, 143 transitions, 1592 flow. Second operand 11 states and 210 transitions. [2024-06-14 13:04:15,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 225 transitions, 2496 flow [2024-06-14 13:04:16,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 225 transitions, 2360 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 13:04:16,059 INFO L231 Difference]: Finished difference. Result has 134 places, 145 transitions, 1643 flow [2024-06-14 13:04:16,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1643, PETRI_PLACES=134, PETRI_TRANSITIONS=145} [2024-06-14 13:04:16,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 13:04:16,059 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 145 transitions, 1643 flow [2024-06-14 13:04:16,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:16,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:16,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:16,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:04:16,060 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:16,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1945076651, now seen corresponding path program 4 times [2024-06-14 13:04:16,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:16,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145062158] [2024-06-14 13:04:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:16,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:19,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:19,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145062158] [2024-06-14 13:04:19,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145062158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:19,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:19,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:19,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897747916] [2024-06-14 13:04:19,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:19,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:19,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:19,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:19,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 145 transitions, 1643 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:19,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:19,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:19,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:21,880 INFO L124 PetriNetUnfolderBase]: 5207/8081 cut-off events. [2024-06-14 13:04:21,880 INFO L125 PetriNetUnfolderBase]: For 176945/176953 co-relation queries the response was YES. [2024-06-14 13:04:21,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42867 conditions, 8081 events. 5207/8081 cut-off events. For 176945/176953 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 48834 event pairs, 2150 based on Foata normal form. 88/8169 useless extension candidates. Maximal degree in co-relation 42802. Up to 6850 conditions per place. [2024-06-14 13:04:21,923 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 156 selfloop transitions, 43 changer transitions 0/202 dead transitions. [2024-06-14 13:04:21,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 202 transitions, 2369 flow [2024-06-14 13:04:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 13:04:21,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:04:21,925 INFO L175 Difference]: Start difference. First operand has 134 places, 145 transitions, 1643 flow. Second operand 10 states and 175 transitions. [2024-06-14 13:04:21,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 202 transitions, 2369 flow [2024-06-14 13:04:22,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 202 transitions, 2230 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:22,148 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1640 flow [2024-06-14 13:04:22,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1640, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-06-14 13:04:22,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-14 13:04:22,149 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1640 flow [2024-06-14 13:04:22,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:22,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:22,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:22,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:04:22,150 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:22,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash -218640069, now seen corresponding path program 1 times [2024-06-14 13:04:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:22,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852913984] [2024-06-14 13:04:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:22,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:25,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:25,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852913984] [2024-06-14 13:04:25,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852913984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:25,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:25,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850721994] [2024-06-14 13:04:25,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:25,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:25,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:25,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:25,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:25,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:25,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1640 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:25,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:25,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:25,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:28,321 INFO L124 PetriNetUnfolderBase]: 5507/8589 cut-off events. [2024-06-14 13:04:28,321 INFO L125 PetriNetUnfolderBase]: For 190335/190343 co-relation queries the response was YES. [2024-06-14 13:04:28,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44526 conditions, 8589 events. 5507/8589 cut-off events. For 190335/190343 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 53038 event pairs, 2269 based on Foata normal form. 88/8677 useless extension candidates. Maximal degree in co-relation 44460. Up to 7358 conditions per place. [2024-06-14 13:04:28,372 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 48 changer transitions 0/214 dead transitions. [2024-06-14 13:04:28,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 214 transitions, 2422 flow [2024-06-14 13:04:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:04:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:04:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-14 13:04:28,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 13:04:28,374 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1640 flow. Second operand 12 states and 206 transitions. [2024-06-14 13:04:28,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 214 transitions, 2422 flow [2024-06-14 13:04:28,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 214 transitions, 2306 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:28,574 INFO L231 Difference]: Finished difference. Result has 140 places, 147 transitions, 1672 flow [2024-06-14 13:04:28,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1672, PETRI_PLACES=140, PETRI_TRANSITIONS=147} [2024-06-14 13:04:28,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-14 13:04:28,575 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 147 transitions, 1672 flow [2024-06-14 13:04:28,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:28,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:28,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:28,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:04:28,576 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:28,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:28,576 INFO L85 PathProgramCache]: Analyzing trace with hash -218632629, now seen corresponding path program 2 times [2024-06-14 13:04:28,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:28,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312726505] [2024-06-14 13:04:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:28,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:31,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:31,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312726505] [2024-06-14 13:04:31,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312726505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:31,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:31,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:31,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873387531] [2024-06-14 13:04:31,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:31,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:31,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:31,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:31,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:31,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 147 transitions, 1672 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:31,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:31,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:31,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:34,804 INFO L124 PetriNetUnfolderBase]: 5779/9053 cut-off events. [2024-06-14 13:04:34,804 INFO L125 PetriNetUnfolderBase]: For 200045/200053 co-relation queries the response was YES. [2024-06-14 13:04:34,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46401 conditions, 9053 events. 5779/9053 cut-off events. For 200045/200053 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 56791 event pairs, 1992 based on Foata normal form. 72/9125 useless extension candidates. Maximal degree in co-relation 46334. Up to 6506 conditions per place. [2024-06-14 13:04:34,851 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 164 selfloop transitions, 54 changer transitions 0/221 dead transitions. [2024-06-14 13:04:34,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 221 transitions, 2512 flow [2024-06-14 13:04:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:04:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:04:34,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 211 transitions. [2024-06-14 13:04:34,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41865079365079366 [2024-06-14 13:04:34,853 INFO L175 Difference]: Start difference. First operand has 140 places, 147 transitions, 1672 flow. Second operand 12 states and 211 transitions. [2024-06-14 13:04:34,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 221 transitions, 2512 flow [2024-06-14 13:04:35,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 221 transitions, 2384 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-14 13:04:35,044 INFO L231 Difference]: Finished difference. Result has 142 places, 148 transitions, 1704 flow [2024-06-14 13:04:35,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1704, PETRI_PLACES=142, PETRI_TRANSITIONS=148} [2024-06-14 13:04:35,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-14 13:04:35,045 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 148 transitions, 1704 flow [2024-06-14 13:04:35,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:35,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:35,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:35,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:04:35,045 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:35,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:35,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1861235285, now seen corresponding path program 5 times [2024-06-14 13:04:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:35,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702890150] [2024-06-14 13:04:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:35,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:38,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702890150] [2024-06-14 13:04:38,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702890150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:38,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:38,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:38,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628271442] [2024-06-14 13:04:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:38,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:38,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:38,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:38,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 148 transitions, 1704 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:38,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:38,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:38,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:40,980 INFO L124 PetriNetUnfolderBase]: 5955/9357 cut-off events. [2024-06-14 13:04:40,981 INFO L125 PetriNetUnfolderBase]: For 203899/203907 co-relation queries the response was YES. [2024-06-14 13:04:41,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47040 conditions, 9357 events. 5955/9357 cut-off events. For 203899/203907 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 59055 event pairs, 2332 based on Foata normal form. 72/9429 useless extension candidates. Maximal degree in co-relation 46972. Up to 6316 conditions per place. [2024-06-14 13:04:41,035 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 168 selfloop transitions, 42 changer transitions 0/213 dead transitions. [2024-06-14 13:04:41,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 213 transitions, 2586 flow [2024-06-14 13:04:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:41,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:04:41,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:04:41,037 INFO L175 Difference]: Start difference. First operand has 142 places, 148 transitions, 1704 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:04:41,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 213 transitions, 2586 flow [2024-06-14 13:04:41,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 213 transitions, 2442 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-14 13:04:41,270 INFO L231 Difference]: Finished difference. Result has 143 places, 150 transitions, 1734 flow [2024-06-14 13:04:41,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1734, PETRI_PLACES=143, PETRI_TRANSITIONS=150} [2024-06-14 13:04:41,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-14 13:04:41,275 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 150 transitions, 1734 flow [2024-06-14 13:04:41,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:41,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:41,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:04:41,275 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:41,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash 78185890, now seen corresponding path program 1 times [2024-06-14 13:04:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:41,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471725172] [2024-06-14 13:04:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:42,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:42,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471725172] [2024-06-14 13:04:42,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471725172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:42,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:42,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:04:42,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657227662] [2024-06-14 13:04:42,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:42,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:04:42,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:04:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:04:42,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:42,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 150 transitions, 1734 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:42,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:42,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:42,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:44,779 INFO L124 PetriNetUnfolderBase]: 5949/9349 cut-off events. [2024-06-14 13:04:44,779 INFO L125 PetriNetUnfolderBase]: For 194407/194415 co-relation queries the response was YES. [2024-06-14 13:04:44,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47092 conditions, 9349 events. 5949/9349 cut-off events. For 194407/194415 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 59547 event pairs, 3122 based on Foata normal form. 10/9359 useless extension candidates. Maximal degree in co-relation 47022. Up to 9301 conditions per place. [2024-06-14 13:04:44,833 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 13 changer transitions 0/161 dead transitions. [2024-06-14 13:04:44,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 161 transitions, 2076 flow [2024-06-14 13:04:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:04:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:04:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-14 13:04:44,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-14 13:04:44,836 INFO L175 Difference]: Start difference. First operand has 143 places, 150 transitions, 1734 flow. Second operand 5 states and 79 transitions. [2024-06-14 13:04:44,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 161 transitions, 2076 flow [2024-06-14 13:04:45,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 161 transitions, 1946 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:45,149 INFO L231 Difference]: Finished difference. Result has 141 places, 150 transitions, 1640 flow [2024-06-14 13:04:45,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1640, PETRI_PLACES=141, PETRI_TRANSITIONS=150} [2024-06-14 13:04:45,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 13:04:45,151 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 150 transitions, 1640 flow [2024-06-14 13:04:45,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:45,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:45,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:45,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:04:45,152 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:45,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 857841385, now seen corresponding path program 6 times [2024-06-14 13:04:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:45,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012615902] [2024-06-14 13:04:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:48,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:48,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012615902] [2024-06-14 13:04:48,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012615902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:48,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:48,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:48,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120614082] [2024-06-14 13:04:48,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:48,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:48,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:48,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:48,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 150 transitions, 1640 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:48,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:48,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:48,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:51,372 INFO L124 PetriNetUnfolderBase]: 6249/9857 cut-off events. [2024-06-14 13:04:51,372 INFO L125 PetriNetUnfolderBase]: For 231866/231874 co-relation queries the response was YES. [2024-06-14 13:04:51,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48357 conditions, 9857 events. 6249/9857 cut-off events. For 231866/231874 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 63576 event pairs, 2548 based on Foata normal form. 88/9945 useless extension candidates. Maximal degree in co-relation 48286. Up to 8197 conditions per place. [2024-06-14 13:04:51,440 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 154 selfloop transitions, 68 changer transitions 0/225 dead transitions. [2024-06-14 13:04:51,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 225 transitions, 2602 flow [2024-06-14 13:04:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:04:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:04:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-14 13:04:51,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-14 13:04:51,442 INFO L175 Difference]: Start difference. First operand has 141 places, 150 transitions, 1640 flow. Second operand 11 states and 205 transitions. [2024-06-14 13:04:51,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 225 transitions, 2602 flow [2024-06-14 13:04:51,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 225 transitions, 2560 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:51,699 INFO L231 Difference]: Finished difference. Result has 147 places, 151 transitions, 1802 flow [2024-06-14 13:04:51,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1802, PETRI_PLACES=147, PETRI_TRANSITIONS=151} [2024-06-14 13:04:51,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-14 13:04:51,700 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 151 transitions, 1802 flow [2024-06-14 13:04:51,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:51,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:51,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:51,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:04:51,701 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:51,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1114557097, now seen corresponding path program 3 times [2024-06-14 13:04:51,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:51,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037814125] [2024-06-14 13:04:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:51,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:55,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037814125] [2024-06-14 13:04:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037814125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:55,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:55,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106304155] [2024-06-14 13:04:55,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:55,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:55,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:04:55,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 151 transitions, 1802 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:55,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:55,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:04:55,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:58,416 INFO L124 PetriNetUnfolderBase]: 6521/10321 cut-off events. [2024-06-14 13:04:58,417 INFO L125 PetriNetUnfolderBase]: For 234058/234066 co-relation queries the response was YES. [2024-06-14 13:04:58,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50803 conditions, 10321 events. 6521/10321 cut-off events. For 234058/234066 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 67463 event pairs, 2548 based on Foata normal form. 72/10393 useless extension candidates. Maximal degree in co-relation 50732. Up to 8071 conditions per place. [2024-06-14 13:04:58,473 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 166 selfloop transitions, 71 changer transitions 0/240 dead transitions. [2024-06-14 13:04:58,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 240 transitions, 2850 flow [2024-06-14 13:04:58,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:04:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:04:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 227 transitions. [2024-06-14 13:04:58,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503968253968254 [2024-06-14 13:04:58,475 INFO L175 Difference]: Start difference. First operand has 147 places, 151 transitions, 1802 flow. Second operand 12 states and 227 transitions. [2024-06-14 13:04:58,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 240 transitions, 2850 flow [2024-06-14 13:04:58,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 240 transitions, 2676 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-14 13:04:58,830 INFO L231 Difference]: Finished difference. Result has 150 places, 152 transitions, 1828 flow [2024-06-14 13:04:58,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1828, PETRI_PLACES=150, PETRI_TRANSITIONS=152} [2024-06-14 13:04:58,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 13:04:58,831 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 152 transitions, 1828 flow [2024-06-14 13:04:58,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:58,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:58,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:58,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:04:58,832 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:58,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1123753867, now seen corresponding path program 4 times [2024-06-14 13:04:58,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:58,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801972169] [2024-06-14 13:04:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:58,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:02,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:02,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801972169] [2024-06-14 13:05:02,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801972169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:02,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:02,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:02,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466964455] [2024-06-14 13:05:02,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:02,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:02,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:02,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:02,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:02,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 152 transitions, 1828 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:02,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:02,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:02,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:05,256 INFO L124 PetriNetUnfolderBase]: 7001/11097 cut-off events. [2024-06-14 13:05:05,257 INFO L125 PetriNetUnfolderBase]: For 261711/261719 co-relation queries the response was YES. [2024-06-14 13:05:05,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54160 conditions, 11097 events. 7001/11097 cut-off events. For 261711/261719 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 73098 event pairs, 2427 based on Foata normal form. 72/11169 useless extension candidates. Maximal degree in co-relation 54088. Up to 5651 conditions per place. [2024-06-14 13:05:05,334 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 78 changer transitions 0/236 dead transitions. [2024-06-14 13:05:05,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 236 transitions, 2836 flow [2024-06-14 13:05:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:05:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:05:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-14 13:05:05,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-14 13:05:05,337 INFO L175 Difference]: Start difference. First operand has 150 places, 152 transitions, 1828 flow. Second operand 11 states and 212 transitions. [2024-06-14 13:05:05,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 236 transitions, 2836 flow [2024-06-14 13:05:05,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 236 transitions, 2652 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-14 13:05:05,670 INFO L231 Difference]: Finished difference. Result has 150 places, 151 transitions, 1746 flow [2024-06-14 13:05:05,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1746, PETRI_PLACES=150, PETRI_TRANSITIONS=151} [2024-06-14 13:05:05,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 13:05:05,671 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 151 transitions, 1746 flow [2024-06-14 13:05:05,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:05,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:05,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:05,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:05:05,671 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:05,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:05,672 INFO L85 PathProgramCache]: Analyzing trace with hash -451733726, now seen corresponding path program 2 times [2024-06-14 13:05:05,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:05,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106468895] [2024-06-14 13:05:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:05,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:07,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:07,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106468895] [2024-06-14 13:05:07,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106468895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:07,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:07,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:05:07,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462093625] [2024-06-14 13:05:07,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:07,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:05:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:05:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:05:07,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:07,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 151 transitions, 1746 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:07,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:07,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:09,584 INFO L124 PetriNetUnfolderBase]: 6995/11089 cut-off events. [2024-06-14 13:05:09,584 INFO L125 PetriNetUnfolderBase]: For 243731/243739 co-relation queries the response was YES. [2024-06-14 13:05:09,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54334 conditions, 11089 events. 6995/11089 cut-off events. For 243731/243739 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 73708 event pairs, 3888 based on Foata normal form. 10/11099 useless extension candidates. Maximal degree in co-relation 54261. Up to 11033 conditions per place. [2024-06-14 13:05:09,655 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-06-14 13:05:09,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 164 transitions, 2098 flow [2024-06-14 13:05:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-14 13:05:09,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-06-14 13:05:09,657 INFO L175 Difference]: Start difference. First operand has 150 places, 151 transitions, 1746 flow. Second operand 6 states and 89 transitions. [2024-06-14 13:05:09,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 164 transitions, 2098 flow [2024-06-14 13:05:09,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 164 transitions, 1892 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 13:05:09,936 INFO L231 Difference]: Finished difference. Result has 147 places, 151 transitions, 1578 flow [2024-06-14 13:05:09,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1578, PETRI_PLACES=147, PETRI_TRANSITIONS=151} [2024-06-14 13:05:09,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-14 13:05:09,937 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 151 transitions, 1578 flow [2024-06-14 13:05:09,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:09,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:09,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:09,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:05:09,938 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:09,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1402114304, now seen corresponding path program 1 times [2024-06-14 13:05:09,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:09,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599289926] [2024-06-14 13:05:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:09,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:12,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:12,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599289926] [2024-06-14 13:05:12,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599289926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:12,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:12,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:05:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436748200] [2024-06-14 13:05:12,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:05:12,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:12,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:05:12,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:05:12,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:12,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 151 transitions, 1578 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:12,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:12,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:12,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:14,303 INFO L124 PetriNetUnfolderBase]: 6689/10613 cut-off events. [2024-06-14 13:05:14,304 INFO L125 PetriNetUnfolderBase]: For 221692/221692 co-relation queries the response was YES. [2024-06-14 13:05:14,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50380 conditions, 10613 events. 6689/10613 cut-off events. For 221692/221692 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 69614 event pairs, 3391 based on Foata normal form. 6/10619 useless extension candidates. Maximal degree in co-relation 50306. Up to 10500 conditions per place. [2024-06-14 13:05:14,358 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 154 selfloop transitions, 18 changer transitions 1/176 dead transitions. [2024-06-14 13:05:14,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 176 transitions, 2082 flow [2024-06-14 13:05:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 13:05:14,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:05:14,360 INFO L175 Difference]: Start difference. First operand has 147 places, 151 transitions, 1578 flow. Second operand 6 states and 99 transitions. [2024-06-14 13:05:14,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 176 transitions, 2082 flow [2024-06-14 13:05:14,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 176 transitions, 2020 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:05:14,582 INFO L231 Difference]: Finished difference. Result has 148 places, 154 transitions, 1606 flow [2024-06-14 13:05:14,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1606, PETRI_PLACES=148, PETRI_TRANSITIONS=154} [2024-06-14 13:05:14,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-14 13:05:14,583 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 154 transitions, 1606 flow [2024-06-14 13:05:14,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:14,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:14,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:14,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:05:14,584 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:14,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash -451727774, now seen corresponding path program 2 times [2024-06-14 13:05:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:14,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13608218] [2024-06-14 13:05:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:14,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:16,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:16,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13608218] [2024-06-14 13:05:16,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13608218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:16,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:16,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:05:16,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398655011] [2024-06-14 13:05:16,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:16,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:05:16,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:05:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:05:16,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:16,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 1606 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:16,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:16,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:16,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:18,384 INFO L124 PetriNetUnfolderBase]: 6431/10152 cut-off events. [2024-06-14 13:05:18,384 INFO L125 PetriNetUnfolderBase]: For 230304/230310 co-relation queries the response was YES. [2024-06-14 13:05:18,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49105 conditions, 10152 events. 6431/10152 cut-off events. For 230304/230310 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 65686 event pairs, 3167 based on Foata normal form. 8/10160 useless extension candidates. Maximal degree in co-relation 49031. Up to 10049 conditions per place. [2024-06-14 13:05:18,451 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 145 selfloop transitions, 17 changer transitions 5/170 dead transitions. [2024-06-14 13:05:18,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 170 transitions, 1976 flow [2024-06-14 13:05:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-14 13:05:18,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 13:05:18,452 INFO L175 Difference]: Start difference. First operand has 148 places, 154 transitions, 1606 flow. Second operand 6 states and 94 transitions. [2024-06-14 13:05:18,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 170 transitions, 1976 flow [2024-06-14 13:05:18,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 170 transitions, 1955 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:05:18,763 INFO L231 Difference]: Finished difference. Result has 151 places, 150 transitions, 1571 flow [2024-06-14 13:05:18,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1571, PETRI_PLACES=151, PETRI_TRANSITIONS=150} [2024-06-14 13:05:18,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-14 13:05:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 150 transitions, 1571 flow [2024-06-14 13:05:18,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:18,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:18,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:18,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:05:18,764 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:18,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1396392448, now seen corresponding path program 1 times [2024-06-14 13:05:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:18,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669561349] [2024-06-14 13:05:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:18,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:21,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669561349] [2024-06-14 13:05:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669561349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:21,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:21,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920487507] [2024-06-14 13:05:21,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:21,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:21,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:21,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:21,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:21,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:21,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 150 transitions, 1571 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:21,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:21,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:21,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:23,256 INFO L124 PetriNetUnfolderBase]: 5722/9030 cut-off events. [2024-06-14 13:05:23,257 INFO L125 PetriNetUnfolderBase]: For 239792/239792 co-relation queries the response was YES. [2024-06-14 13:05:23,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45725 conditions, 9030 events. 5722/9030 cut-off events. For 239792/239792 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57178 event pairs, 2996 based on Foata normal form. 2/9032 useless extension candidates. Maximal degree in co-relation 45650. Up to 9003 conditions per place. [2024-06-14 13:05:23,312 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 152 selfloop transitions, 10 changer transitions 0/165 dead transitions. [2024-06-14 13:05:23,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 165 transitions, 1945 flow [2024-06-14 13:05:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-06-14 13:05:23,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-14 13:05:23,313 INFO L175 Difference]: Start difference. First operand has 151 places, 150 transitions, 1571 flow. Second operand 6 states and 86 transitions. [2024-06-14 13:05:23,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 165 transitions, 1945 flow [2024-06-14 13:05:23,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 165 transitions, 1914 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:05:23,594 INFO L231 Difference]: Finished difference. Result has 154 places, 152 transitions, 1589 flow [2024-06-14 13:05:23,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1589, PETRI_PLACES=154, PETRI_TRANSITIONS=152} [2024-06-14 13:05:23,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 13:05:23,595 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 152 transitions, 1589 flow [2024-06-14 13:05:23,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:23,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:23,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:23,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:05:23,595 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:23,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash -693483397, now seen corresponding path program 1 times [2024-06-14 13:05:23,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:23,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605029399] [2024-06-14 13:05:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:23,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:25,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605029399] [2024-06-14 13:05:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605029399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:25,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:25,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332517177] [2024-06-14 13:05:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:25,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:25,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:25,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:25,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 152 transitions, 1589 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:25,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:25,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:25,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:27,386 INFO L124 PetriNetUnfolderBase]: 5742/9060 cut-off events. [2024-06-14 13:05:27,387 INFO L125 PetriNetUnfolderBase]: For 254348/254354 co-relation queries the response was YES. [2024-06-14 13:05:27,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46281 conditions, 9060 events. 5742/9060 cut-off events. For 254348/254354 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57443 event pairs, 2799 based on Foata normal form. 10/9070 useless extension candidates. Maximal degree in co-relation 46204. Up to 8934 conditions per place. [2024-06-14 13:05:27,449 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 158 selfloop transitions, 22 changer transitions 0/183 dead transitions. [2024-06-14 13:05:27,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 183 transitions, 2115 flow [2024-06-14 13:05:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:05:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:05:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:05:27,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-14 13:05:27,451 INFO L175 Difference]: Start difference. First operand has 154 places, 152 transitions, 1589 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:05:27,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 183 transitions, 2115 flow [2024-06-14 13:05:27,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 183 transitions, 2082 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:27,723 INFO L231 Difference]: Finished difference. Result has 158 places, 155 transitions, 1640 flow [2024-06-14 13:05:27,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1640, PETRI_PLACES=158, PETRI_TRANSITIONS=155} [2024-06-14 13:05:27,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 13:05:27,724 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 155 transitions, 1640 flow [2024-06-14 13:05:27,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:27,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:27,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:27,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:05:27,725 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:27,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1871203077, now seen corresponding path program 2 times [2024-06-14 13:05:27,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:27,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377730953] [2024-06-14 13:05:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:27,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:29,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:29,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377730953] [2024-06-14 13:05:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377730953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:29,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:29,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:29,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028165480] [2024-06-14 13:05:29,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:29,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:29,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:29,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:29,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:29,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:29,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 155 transitions, 1640 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:29,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:29,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:29,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:31,370 INFO L124 PetriNetUnfolderBase]: 5730/9048 cut-off events. [2024-06-14 13:05:31,370 INFO L125 PetriNetUnfolderBase]: For 265700/265708 co-relation queries the response was YES. [2024-06-14 13:05:31,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46522 conditions, 9048 events. 5730/9048 cut-off events. For 265700/265708 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57347 event pairs, 2815 based on Foata normal form. 12/9060 useless extension candidates. Maximal degree in co-relation 46444. Up to 8926 conditions per place. [2024-06-14 13:05:31,424 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 147 selfloop transitions, 21 changer transitions 0/171 dead transitions. [2024-06-14 13:05:31,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 171 transitions, 2012 flow [2024-06-14 13:05:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-14 13:05:31,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 13:05:31,426 INFO L175 Difference]: Start difference. First operand has 158 places, 155 transitions, 1640 flow. Second operand 6 states and 94 transitions. [2024-06-14 13:05:31,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 171 transitions, 2012 flow [2024-06-14 13:05:31,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 171 transitions, 1921 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:05:31,651 INFO L231 Difference]: Finished difference. Result has 158 places, 155 transitions, 1597 flow [2024-06-14 13:05:31,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1597, PETRI_PLACES=158, PETRI_TRANSITIONS=155} [2024-06-14 13:05:31,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 13:05:31,652 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 155 transitions, 1597 flow [2024-06-14 13:05:31,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:31,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:31,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:31,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:05:31,653 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:31,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash -338921827, now seen corresponding path program 3 times [2024-06-14 13:05:31,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:31,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932073041] [2024-06-14 13:05:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:31,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:33,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:33,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932073041] [2024-06-14 13:05:33,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932073041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:33,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:33,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:33,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981854209] [2024-06-14 13:05:33,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:33,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:33,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:33,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:33,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 155 transitions, 1597 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:33,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:33,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:33,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:35,556 INFO L124 PetriNetUnfolderBase]: 5718/9032 cut-off events. [2024-06-14 13:05:35,556 INFO L125 PetriNetUnfolderBase]: For 277184/277192 co-relation queries the response was YES. [2024-06-14 13:05:35,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46351 conditions, 9032 events. 5718/9032 cut-off events. For 277184/277192 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57337 event pairs, 2807 based on Foata normal form. 12/9044 useless extension candidates. Maximal degree in co-relation 46273. Up to 8886 conditions per place. [2024-06-14 13:05:35,620 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 147 selfloop transitions, 26 changer transitions 0/176 dead transitions. [2024-06-14 13:05:35,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 176 transitions, 2019 flow [2024-06-14 13:05:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:05:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:05:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-14 13:05:35,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:05:35,622 INFO L175 Difference]: Start difference. First operand has 158 places, 155 transitions, 1597 flow. Second operand 7 states and 105 transitions. [2024-06-14 13:05:35,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 176 transitions, 2019 flow [2024-06-14 13:05:35,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 176 transitions, 1977 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:05:35,932 INFO L231 Difference]: Finished difference. Result has 160 places, 158 transitions, 1655 flow [2024-06-14 13:05:35,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1655, PETRI_PLACES=160, PETRI_TRANSITIONS=158} [2024-06-14 13:05:35,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-14 13:05:35,932 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 158 transitions, 1655 flow [2024-06-14 13:05:35,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:35,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:35,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:35,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:05:35,933 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:35,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:35,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1797714303, now seen corresponding path program 1 times [2024-06-14 13:05:35,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:35,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118344448] [2024-06-14 13:05:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:35,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:38,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:38,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118344448] [2024-06-14 13:05:38,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118344448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:38,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:38,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:38,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409901269] [2024-06-14 13:05:38,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:38,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:38,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:38,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:38,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:38,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 158 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:38,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:38,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:38,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:40,415 INFO L124 PetriNetUnfolderBase]: 5716/9026 cut-off events. [2024-06-14 13:05:40,415 INFO L125 PetriNetUnfolderBase]: For 290422/290428 co-relation queries the response was YES. [2024-06-14 13:05:40,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47546 conditions, 9026 events. 5716/9026 cut-off events. For 290422/290428 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 56988 event pairs, 2689 based on Foata normal form. 12/9038 useless extension candidates. Maximal degree in co-relation 47467. Up to 8817 conditions per place. [2024-06-14 13:05:40,477 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 149 selfloop transitions, 35 changer transitions 1/188 dead transitions. [2024-06-14 13:05:40,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 188 transitions, 2206 flow [2024-06-14 13:05:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:05:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:05:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:05:40,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 13:05:40,479 INFO L175 Difference]: Start difference. First operand has 160 places, 158 transitions, 1655 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:05:40,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 188 transitions, 2206 flow [2024-06-14 13:05:40,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 188 transitions, 2128 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:05:40,803 INFO L231 Difference]: Finished difference. Result has 163 places, 160 transitions, 1693 flow [2024-06-14 13:05:40,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1693, PETRI_PLACES=163, PETRI_TRANSITIONS=160} [2024-06-14 13:05:40,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-14 13:05:40,804 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 160 transitions, 1693 flow [2024-06-14 13:05:40,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:40,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:40,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:40,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:05:40,805 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:40,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:40,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1827357123, now seen corresponding path program 2 times [2024-06-14 13:05:40,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:40,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024558249] [2024-06-14 13:05:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:40,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:42,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:42,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024558249] [2024-06-14 13:05:42,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024558249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:42,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:42,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:42,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597873747] [2024-06-14 13:05:42,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:42,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:42,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:42,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:42,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:42,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:42,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 160 transitions, 1693 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:42,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:42,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:42,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:44,995 INFO L124 PetriNetUnfolderBase]: 5550/8732 cut-off events. [2024-06-14 13:05:44,995 INFO L125 PetriNetUnfolderBase]: For 300202/300219 co-relation queries the response was YES. [2024-06-14 13:05:45,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46709 conditions, 8732 events. 5550/8732 cut-off events. For 300202/300219 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 54531 event pairs, 2538 based on Foata normal form. 18/8750 useless extension candidates. Maximal degree in co-relation 46629. Up to 8534 conditions per place. [2024-06-14 13:05:45,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 32 changer transitions 4/181 dead transitions. [2024-06-14 13:05:45,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 181 transitions, 2097 flow [2024-06-14 13:05:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:05:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:05:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 13:05:45,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-14 13:05:45,048 INFO L175 Difference]: Start difference. First operand has 163 places, 160 transitions, 1693 flow. Second operand 7 states and 111 transitions. [2024-06-14 13:05:45,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 181 transitions, 2097 flow [2024-06-14 13:05:45,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 181 transitions, 2035 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:05:45,383 INFO L231 Difference]: Finished difference. Result has 164 places, 157 transitions, 1659 flow [2024-06-14 13:05:45,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1659, PETRI_PLACES=164, PETRI_TRANSITIONS=157} [2024-06-14 13:05:45,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-14 13:05:45,384 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 157 transitions, 1659 flow [2024-06-14 13:05:45,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:45,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:45,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:45,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:05:45,384 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:45,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:45,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1258421185, now seen corresponding path program 1 times [2024-06-14 13:05:45,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:45,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241822959] [2024-06-14 13:05:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:45,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:47,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241822959] [2024-06-14 13:05:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241822959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:47,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:47,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:05:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120293283] [2024-06-14 13:05:47,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:05:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:05:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:05:47,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:47,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 157 transitions, 1659 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:47,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:47,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:47,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:49,767 INFO L124 PetriNetUnfolderBase]: 5114/8042 cut-off events. [2024-06-14 13:05:49,767 INFO L125 PetriNetUnfolderBase]: For 298482/298488 co-relation queries the response was YES. [2024-06-14 13:05:49,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44277 conditions, 8042 events. 5114/8042 cut-off events. For 298482/298488 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49567 event pairs, 2573 based on Foata normal form. 8/8050 useless extension candidates. Maximal degree in co-relation 44197. Up to 7982 conditions per place. [2024-06-14 13:05:49,828 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 17 changer transitions 0/172 dead transitions. [2024-06-14 13:05:49,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 172 transitions, 2059 flow [2024-06-14 13:05:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-14 13:05:49,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-06-14 13:05:49,832 INFO L175 Difference]: Start difference. First operand has 164 places, 157 transitions, 1659 flow. Second operand 6 states and 89 transitions. [2024-06-14 13:05:49,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 172 transitions, 2059 flow [2024-06-14 13:05:50,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 172 transitions, 1964 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:50,147 INFO L231 Difference]: Finished difference. Result has 162 places, 159 transitions, 1642 flow [2024-06-14 13:05:50,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1642, PETRI_PLACES=162, PETRI_TRANSITIONS=159} [2024-06-14 13:05:50,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-14 13:05:50,150 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 159 transitions, 1642 flow [2024-06-14 13:05:50,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:50,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:50,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:50,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:05:50,151 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:50,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1187934975, now seen corresponding path program 3 times [2024-06-14 13:05:50,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:50,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086527094] [2024-06-14 13:05:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:50,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:52,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086527094] [2024-06-14 13:05:52,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086527094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:52,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:52,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:52,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603948831] [2024-06-14 13:05:52,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:52,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:52,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:52,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 159 transitions, 1642 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:52,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:52,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:52,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:54,654 INFO L124 PetriNetUnfolderBase]: 5144/8084 cut-off events. [2024-06-14 13:05:54,655 INFO L125 PetriNetUnfolderBase]: For 300908/300914 co-relation queries the response was YES. [2024-06-14 13:05:54,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44491 conditions, 8084 events. 5144/8084 cut-off events. For 300908/300914 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49631 event pairs, 2342 based on Foata normal form. 12/8096 useless extension candidates. Maximal degree in co-relation 44411. Up to 7771 conditions per place. [2024-06-14 13:05:54,720 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 45 changer transitions 0/190 dead transitions. [2024-06-14 13:05:54,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 190 transitions, 2298 flow [2024-06-14 13:05:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:05:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:05:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:05:54,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-14 13:05:54,722 INFO L175 Difference]: Start difference. First operand has 162 places, 159 transitions, 1642 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:05:54,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 190 transitions, 2298 flow [2024-06-14 13:05:55,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 190 transitions, 2244 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:55,120 INFO L231 Difference]: Finished difference. Result has 165 places, 165 transitions, 1761 flow [2024-06-14 13:05:55,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1761, PETRI_PLACES=165, PETRI_TRANSITIONS=165} [2024-06-14 13:05:55,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-14 13:05:55,121 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 165 transitions, 1761 flow [2024-06-14 13:05:55,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:55,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:55,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:55,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:05:55,122 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:55,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash -318643743, now seen corresponding path program 4 times [2024-06-14 13:05:55,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:55,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359617157] [2024-06-14 13:05:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:55,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:57,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:57,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359617157] [2024-06-14 13:05:57,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359617157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:57,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:57,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59390661] [2024-06-14 13:05:57,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:57,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:57,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:57,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:57,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:57,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:05:57,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 165 transitions, 1761 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:57,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:57,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:05:57,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:59,369 INFO L124 PetriNetUnfolderBase]: 5154/8104 cut-off events. [2024-06-14 13:05:59,370 INFO L125 PetriNetUnfolderBase]: For 313705/313724 co-relation queries the response was YES. [2024-06-14 13:05:59,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45149 conditions, 8104 events. 5154/8104 cut-off events. For 313705/313724 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49744 event pairs, 2406 based on Foata normal form. 17/8121 useless extension candidates. Maximal degree in co-relation 45068. Up to 7777 conditions per place. [2024-06-14 13:05:59,434 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 49 changer transitions 0/189 dead transitions. [2024-06-14 13:05:59,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 189 transitions, 2457 flow [2024-06-14 13:05:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:05:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:05:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:05:59,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:05:59,436 INFO L175 Difference]: Start difference. First operand has 165 places, 165 transitions, 1761 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:05:59,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 189 transitions, 2457 flow [2024-06-14 13:05:59,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 189 transitions, 2387 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:05:59,817 INFO L231 Difference]: Finished difference. Result has 169 places, 168 transitions, 1839 flow [2024-06-14 13:05:59,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1839, PETRI_PLACES=169, PETRI_TRANSITIONS=168} [2024-06-14 13:05:59,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 13:05:59,817 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 168 transitions, 1839 flow [2024-06-14 13:05:59,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:59,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:59,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:59,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:05:59,818 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:59,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash 538679389, now seen corresponding path program 5 times [2024-06-14 13:05:59,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:59,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056001581] [2024-06-14 13:05:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:01,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056001581] [2024-06-14 13:06:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056001581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:01,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:01,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169890272] [2024-06-14 13:06:01,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:01,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:01,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:01,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:01,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:01,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:01,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 168 transitions, 1839 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:01,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:01,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:01,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:03,930 INFO L124 PetriNetUnfolderBase]: 5148/8096 cut-off events. [2024-06-14 13:06:03,931 INFO L125 PetriNetUnfolderBase]: For 327949/327968 co-relation queries the response was YES. [2024-06-14 13:06:03,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45383 conditions, 8096 events. 5148/8096 cut-off events. For 327949/327968 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49734 event pairs, 2394 based on Foata normal form. 17/8113 useless extension candidates. Maximal degree in co-relation 45301. Up to 7774 conditions per place. [2024-06-14 13:06:03,991 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 49 changer transitions 0/189 dead transitions. [2024-06-14 13:06:03,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 189 transitions, 2417 flow [2024-06-14 13:06:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:06:03,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:06:03,993 INFO L175 Difference]: Start difference. First operand has 169 places, 168 transitions, 1839 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:06:03,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 189 transitions, 2417 flow [2024-06-14 13:06:04,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 189 transitions, 2244 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:04,401 INFO L231 Difference]: Finished difference. Result has 170 places, 168 transitions, 1770 flow [2024-06-14 13:06:04,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1770, PETRI_PLACES=170, PETRI_TRANSITIONS=168} [2024-06-14 13:06:04,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-14 13:06:04,403 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 168 transitions, 1770 flow [2024-06-14 13:06:04,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:04,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:04,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:04,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:06:04,404 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:04,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash 539062115, now seen corresponding path program 2 times [2024-06-14 13:06:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:04,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741491342] [2024-06-14 13:06:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:04,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:07,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741491342] [2024-06-14 13:06:07,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741491342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:07,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:07,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:07,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529296953] [2024-06-14 13:06:07,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:07,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:07,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:07,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 168 transitions, 1770 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:07,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:07,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:07,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:09,229 INFO L124 PetriNetUnfolderBase]: 5156/8102 cut-off events. [2024-06-14 13:06:09,230 INFO L125 PetriNetUnfolderBase]: For 342242/342248 co-relation queries the response was YES. [2024-06-14 13:06:09,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45758 conditions, 8102 events. 5156/8102 cut-off events. For 342242/342248 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49869 event pairs, 2590 based on Foata normal form. 8/8110 useless extension candidates. Maximal degree in co-relation 45675. Up to 8040 conditions per place. [2024-06-14 13:06:09,290 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 164 selfloop transitions, 18 changer transitions 0/185 dead transitions. [2024-06-14 13:06:09,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 2204 flow [2024-06-14 13:06:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-06-14 13:06:09,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2024-06-14 13:06:09,292 INFO L175 Difference]: Start difference. First operand has 170 places, 168 transitions, 1770 flow. Second operand 7 states and 99 transitions. [2024-06-14 13:06:09,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 2204 flow [2024-06-14 13:06:09,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 185 transitions, 2074 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:09,656 INFO L231 Difference]: Finished difference. Result has 170 places, 170 transitions, 1721 flow [2024-06-14 13:06:09,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1721, PETRI_PLACES=170, PETRI_TRANSITIONS=170} [2024-06-14 13:06:09,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-14 13:06:09,657 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 170 transitions, 1721 flow [2024-06-14 13:06:09,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:09,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:09,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:09,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:06:09,658 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:09,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash -783237497, now seen corresponding path program 3 times [2024-06-14 13:06:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:09,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822430760] [2024-06-14 13:06:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:09,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:12,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:12,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822430760] [2024-06-14 13:06:12,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822430760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:12,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:12,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771801605] [2024-06-14 13:06:12,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:12,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:12,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:12,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 170 transitions, 1721 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:12,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:12,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:12,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:14,222 INFO L124 PetriNetUnfolderBase]: 5151/8095 cut-off events. [2024-06-14 13:06:14,227 INFO L125 PetriNetUnfolderBase]: For 356033/356039 co-relation queries the response was YES. [2024-06-14 13:06:14,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45834 conditions, 8095 events. 5151/8095 cut-off events. For 356033/356039 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49826 event pairs, 2577 based on Foata normal form. 8/8103 useless extension candidates. Maximal degree in co-relation 45751. Up to 8013 conditions per place. [2024-06-14 13:06:14,282 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 161 selfloop transitions, 23 changer transitions 0/187 dead transitions. [2024-06-14 13:06:14,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 187 transitions, 2163 flow [2024-06-14 13:06:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-06-14 13:06:14,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2024-06-14 13:06:14,284 INFO L175 Difference]: Start difference. First operand has 170 places, 170 transitions, 1721 flow. Second operand 7 states and 99 transitions. [2024-06-14 13:06:14,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 187 transitions, 2163 flow [2024-06-14 13:06:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 187 transitions, 2098 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:14,635 INFO L231 Difference]: Finished difference. Result has 172 places, 172 transitions, 1751 flow [2024-06-14 13:06:14,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1751, PETRI_PLACES=172, PETRI_TRANSITIONS=172} [2024-06-14 13:06:14,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-14 13:06:14,635 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 172 transitions, 1751 flow [2024-06-14 13:06:14,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:14,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:14,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:14,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:06:14,636 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:14,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2059881237, now seen corresponding path program 1 times [2024-06-14 13:06:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:14,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638285856] [2024-06-14 13:06:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:17,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638285856] [2024-06-14 13:06:17,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638285856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:17,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:17,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15684290] [2024-06-14 13:06:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:17,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:17,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:17,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:17,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:17,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 172 transitions, 1751 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:17,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:17,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:17,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:19,717 INFO L124 PetriNetUnfolderBase]: 5203/8173 cut-off events. [2024-06-14 13:06:19,718 INFO L125 PetriNetUnfolderBase]: For 383842/383842 co-relation queries the response was YES. [2024-06-14 13:06:19,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46573 conditions, 8173 events. 5203/8173 cut-off events. For 383842/383842 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 50125 event pairs, 2516 based on Foata normal form. 14/8187 useless extension candidates. Maximal degree in co-relation 46489. Up to 8031 conditions per place. [2024-06-14 13:06:19,782 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 179 selfloop transitions, 19 changer transitions 0/201 dead transitions. [2024-06-14 13:06:19,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 201 transitions, 2255 flow [2024-06-14 13:06:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:06:19,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:06:19,783 INFO L175 Difference]: Start difference. First operand has 172 places, 172 transitions, 1751 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:06:19,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 201 transitions, 2255 flow [2024-06-14 13:06:20,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 201 transitions, 2176 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:20,176 INFO L231 Difference]: Finished difference. Result has 174 places, 174 transitions, 1750 flow [2024-06-14 13:06:20,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=174, PETRI_TRANSITIONS=174} [2024-06-14 13:06:20,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-14 13:06:20,177 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 174 transitions, 1750 flow [2024-06-14 13:06:20,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:20,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:20,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:20,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:06:20,178 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:20,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:20,178 INFO L85 PathProgramCache]: Analyzing trace with hash -311278205, now seen corresponding path program 2 times [2024-06-14 13:06:20,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:20,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201369086] [2024-06-14 13:06:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:20,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:23,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:23,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201369086] [2024-06-14 13:06:23,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201369086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:23,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:23,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:23,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559634984] [2024-06-14 13:06:23,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:23,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:23,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:23,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 174 transitions, 1750 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:23,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:23,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:23,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:25,570 INFO L124 PetriNetUnfolderBase]: 5211/8188 cut-off events. [2024-06-14 13:06:25,571 INFO L125 PetriNetUnfolderBase]: For 389709/389715 co-relation queries the response was YES. [2024-06-14 13:06:25,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47135 conditions, 8188 events. 5211/8188 cut-off events. For 389709/389715 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 50247 event pairs, 2497 based on Foata normal form. 8/8196 useless extension candidates. Maximal degree in co-relation 47050. Up to 8095 conditions per place. [2024-06-14 13:06:25,639 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 19 changer transitions 0/193 dead transitions. [2024-06-14 13:06:25,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 193 transitions, 2202 flow [2024-06-14 13:06:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-14 13:06:25,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3435374149659864 [2024-06-14 13:06:25,640 INFO L175 Difference]: Start difference. First operand has 174 places, 174 transitions, 1750 flow. Second operand 7 states and 101 transitions. [2024-06-14 13:06:25,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 193 transitions, 2202 flow [2024-06-14 13:06:26,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 193 transitions, 2144 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:26,109 INFO L231 Difference]: Finished difference. Result has 176 places, 176 transitions, 1773 flow [2024-06-14 13:06:26,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1773, PETRI_PLACES=176, PETRI_TRANSITIONS=176} [2024-06-14 13:06:26,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 13:06:26,110 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 176 transitions, 1773 flow [2024-06-14 13:06:26,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:26,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:26,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:26,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:06:26,111 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:26,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:26,111 INFO L85 PathProgramCache]: Analyzing trace with hash 552025757, now seen corresponding path program 3 times [2024-06-14 13:06:26,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:26,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250582882] [2024-06-14 13:06:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:29,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:29,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250582882] [2024-06-14 13:06:29,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250582882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:29,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:29,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:29,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829011884] [2024-06-14 13:06:29,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:29,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:29,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:29,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:29,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 176 transitions, 1773 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:29,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:29,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:30,904 INFO L124 PetriNetUnfolderBase]: 5206/8181 cut-off events. [2024-06-14 13:06:30,905 INFO L125 PetriNetUnfolderBase]: For 404695/404701 co-relation queries the response was YES. [2024-06-14 13:06:30,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47370 conditions, 8181 events. 5206/8181 cut-off events. For 404695/404701 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 50232 event pairs, 2488 based on Foata normal form. 8/8189 useless extension candidates. Maximal degree in co-relation 47284. Up to 8016 conditions per place. [2024-06-14 13:06:30,970 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 24 changer transitions 0/200 dead transitions. [2024-06-14 13:06:30,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 200 transitions, 2271 flow [2024-06-14 13:06:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 13:06:30,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-14 13:06:30,973 INFO L175 Difference]: Start difference. First operand has 176 places, 176 transitions, 1773 flow. Second operand 7 states and 107 transitions. [2024-06-14 13:06:30,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 200 transitions, 2271 flow [2024-06-14 13:06:31,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 200 transitions, 2206 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:31,391 INFO L231 Difference]: Finished difference. Result has 178 places, 178 transitions, 1803 flow [2024-06-14 13:06:31,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1803, PETRI_PLACES=178, PETRI_TRANSITIONS=178} [2024-06-14 13:06:31,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 13:06:31,391 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 178 transitions, 1803 flow [2024-06-14 13:06:31,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:31,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:31,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:31,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:06:31,392 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:31,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash -726131366, now seen corresponding path program 1 times [2024-06-14 13:06:31,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:31,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794962222] [2024-06-14 13:06:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:34,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794962222] [2024-06-14 13:06:34,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794962222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:34,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:34,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:34,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423586355] [2024-06-14 13:06:34,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:34,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:34,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:34,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:34,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:34,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 178 transitions, 1803 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:34,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:34,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:36,708 INFO L124 PetriNetUnfolderBase]: 5234/8224 cut-off events. [2024-06-14 13:06:36,708 INFO L125 PetriNetUnfolderBase]: For 428774/428780 co-relation queries the response was YES. [2024-06-14 13:06:36,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48016 conditions, 8224 events. 5234/8224 cut-off events. For 428774/428780 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50383 event pairs, 2246 based on Foata normal form. 14/8238 useless extension candidates. Maximal degree in co-relation 47929. Up to 7948 conditions per place. [2024-06-14 13:06:36,772 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 26 changer transitions 0/220 dead transitions. [2024-06-14 13:06:36,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 220 transitions, 2463 flow [2024-06-14 13:06:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:06:36,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 13:06:36,774 INFO L175 Difference]: Start difference. First operand has 178 places, 178 transitions, 1803 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:06:36,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 220 transitions, 2463 flow [2024-06-14 13:06:37,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 220 transitions, 2384 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:37,248 INFO L231 Difference]: Finished difference. Result has 182 places, 179 transitions, 1792 flow [2024-06-14 13:06:37,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1792, PETRI_PLACES=182, PETRI_TRANSITIONS=179} [2024-06-14 13:06:37,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-14 13:06:37,249 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 179 transitions, 1792 flow [2024-06-14 13:06:37,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:37,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:37,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:37,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:06:37,250 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:37,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1078017548, now seen corresponding path program 2 times [2024-06-14 13:06:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626283591] [2024-06-14 13:06:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:37,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626283591] [2024-06-14 13:06:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626283591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:40,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:40,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:40,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793701307] [2024-06-14 13:06:40,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:40,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:40,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:40,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:40,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 179 transitions, 1792 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:40,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:40,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:40,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:42,613 INFO L124 PetriNetUnfolderBase]: 5278/8292 cut-off events. [2024-06-14 13:06:42,613 INFO L125 PetriNetUnfolderBase]: For 450753/450759 co-relation queries the response was YES. [2024-06-14 13:06:42,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48703 conditions, 8292 events. 5278/8292 cut-off events. For 450753/450759 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 51029 event pairs, 2402 based on Foata normal form. 18/8310 useless extension candidates. Maximal degree in co-relation 48615. Up to 8122 conditions per place. [2024-06-14 13:06:42,673 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 188 selfloop transitions, 23 changer transitions 0/214 dead transitions. [2024-06-14 13:06:42,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 214 transitions, 2324 flow [2024-06-14 13:06:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:06:42,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:06:42,675 INFO L175 Difference]: Start difference. First operand has 182 places, 179 transitions, 1792 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:06:42,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 214 transitions, 2324 flow [2024-06-14 13:06:43,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 214 transitions, 2250 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:43,242 INFO L231 Difference]: Finished difference. Result has 184 places, 180 transitions, 1785 flow [2024-06-14 13:06:43,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1785, PETRI_PLACES=184, PETRI_TRANSITIONS=180} [2024-06-14 13:06:43,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 13:06:43,243 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 180 transitions, 1785 flow [2024-06-14 13:06:43,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:43,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:43,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:43,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:06:43,244 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:43,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1072594904, now seen corresponding path program 1 times [2024-06-14 13:06:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:43,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306813087] [2024-06-14 13:06:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:43,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:45,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:45,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306813087] [2024-06-14 13:06:45,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306813087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:45,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:45,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:45,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744297688] [2024-06-14 13:06:45,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:45,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:45,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:45,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:45,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 180 transitions, 1785 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:45,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:45,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:45,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:48,499 INFO L124 PetriNetUnfolderBase]: 5274/8290 cut-off events. [2024-06-14 13:06:48,499 INFO L125 PetriNetUnfolderBase]: For 459088/459105 co-relation queries the response was YES. [2024-06-14 13:06:48,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48396 conditions, 8290 events. 5274/8290 cut-off events. For 459088/459105 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50764 event pairs, 1957 based on Foata normal form. 28/8318 useless extension candidates. Maximal degree in co-relation 48307. Up to 7500 conditions per place. [2024-06-14 13:06:48,554 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 173 selfloop transitions, 60 changer transitions 1/237 dead transitions. [2024-06-14 13:06:48,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 237 transitions, 2595 flow [2024-06-14 13:06:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:06:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:06:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:06:48,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 13:06:48,556 INFO L175 Difference]: Start difference. First operand has 184 places, 180 transitions, 1785 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:06:48,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 237 transitions, 2595 flow [2024-06-14 13:06:48,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 237 transitions, 2548 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:48,978 INFO L231 Difference]: Finished difference. Result has 187 places, 182 transitions, 1885 flow [2024-06-14 13:06:48,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1885, PETRI_PLACES=187, PETRI_TRANSITIONS=182} [2024-06-14 13:06:48,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-14 13:06:48,979 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 182 transitions, 1885 flow [2024-06-14 13:06:48,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:48,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:48,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:06:48,980 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:48,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1078308824, now seen corresponding path program 2 times [2024-06-14 13:06:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:48,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609805091] [2024-06-14 13:06:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:51,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:51,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609805091] [2024-06-14 13:06:51,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609805091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:51,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:51,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193820652] [2024-06-14 13:06:51,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:51,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:51,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:51,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:51,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 182 transitions, 1885 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:51,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:51,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:51,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:53,719 INFO L124 PetriNetUnfolderBase]: 5382/8442 cut-off events. [2024-06-14 13:06:53,719 INFO L125 PetriNetUnfolderBase]: For 484596/484613 co-relation queries the response was YES. [2024-06-14 13:06:53,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50505 conditions, 8442 events. 5382/8442 cut-off events. For 484596/484613 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51546 event pairs, 1952 based on Foata normal form. 20/8462 useless extension candidates. Maximal degree in co-relation 50415. Up to 7556 conditions per place. [2024-06-14 13:06:53,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 162 selfloop transitions, 66 changer transitions 1/232 dead transitions. [2024-06-14 13:06:53,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 232 transitions, 2731 flow [2024-06-14 13:06:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:06:53,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:06:53,915 INFO L175 Difference]: Start difference. First operand has 187 places, 182 transitions, 1885 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:06:53,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 232 transitions, 2731 flow [2024-06-14 13:06:54,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 232 transitions, 2615 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:54,527 INFO L231 Difference]: Finished difference. Result has 190 places, 188 transitions, 2010 flow [2024-06-14 13:06:54,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2010, PETRI_PLACES=190, PETRI_TRANSITIONS=188} [2024-06-14 13:06:54,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 13:06:54,528 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 188 transitions, 2010 flow [2024-06-14 13:06:54,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:54,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:54,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:54,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:06:54,529 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:54,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash -621989544, now seen corresponding path program 3 times [2024-06-14 13:06:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319526717] [2024-06-14 13:06:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:56,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:56,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319526717] [2024-06-14 13:06:56,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319526717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:56,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:56,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559328730] [2024-06-14 13:06:56,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:56,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:06:56,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 188 transitions, 2010 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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) [2024-06-14 13:06:56,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:56,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:06:56,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:00,314 INFO L124 PetriNetUnfolderBase]: 6464/9994 cut-off events. [2024-06-14 13:07:00,314 INFO L125 PetriNetUnfolderBase]: For 587080/587080 co-relation queries the response was YES. [2024-06-14 13:07:00,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62381 conditions, 9994 events. 6464/9994 cut-off events. For 587080/587080 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 61523 event pairs, 2842 based on Foata normal form. 12/10006 useless extension candidates. Maximal degree in co-relation 62289. Up to 8907 conditions per place. [2024-06-14 13:07:00,405 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 265 selfloop transitions, 83 changer transitions 1/352 dead transitions. [2024-06-14 13:07:00,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 352 transitions, 4517 flow [2024-06-14 13:07:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-14 13:07:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-14 13:07:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 249 transitions. [2024-06-14 13:07:00,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705357142857143 [2024-06-14 13:07:00,407 INFO L175 Difference]: Start difference. First operand has 190 places, 188 transitions, 2010 flow. Second operand 16 states and 249 transitions. [2024-06-14 13:07:00,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 352 transitions, 4517 flow [2024-06-14 13:07:01,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 352 transitions, 4318 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:01,192 INFO L231 Difference]: Finished difference. Result has 206 places, 267 transitions, 3219 flow [2024-06-14 13:07:01,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3219, PETRI_PLACES=206, PETRI_TRANSITIONS=267} [2024-06-14 13:07:01,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-14 13:07:01,192 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 267 transitions, 3219 flow [2024-06-14 13:07:01,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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) [2024-06-14 13:07:01,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:01,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:01,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:07:01,193 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:01,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash -430673156, now seen corresponding path program 3 times [2024-06-14 13:07:01,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:01,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992435589] [2024-06-14 13:07:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:01,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:03,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992435589] [2024-06-14 13:07:03,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992435589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:03,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:03,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:03,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606437550] [2024-06-14 13:07:03,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:03,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:03,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:03,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:03,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 267 transitions, 3219 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:03,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:03,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:03,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:06,227 INFO L124 PetriNetUnfolderBase]: 6428/9952 cut-off events. [2024-06-14 13:07:06,228 INFO L125 PetriNetUnfolderBase]: For 598459/598467 co-relation queries the response was YES. [2024-06-14 13:07:06,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63726 conditions, 9952 events. 6428/9952 cut-off events. For 598459/598467 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 61186 event pairs, 2839 based on Foata normal form. 20/9972 useless extension candidates. Maximal degree in co-relation 63628. Up to 9737 conditions per place. [2024-06-14 13:07:06,313 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 258 selfloop transitions, 29 changer transitions 0/290 dead transitions. [2024-06-14 13:07:06,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 290 transitions, 3873 flow [2024-06-14 13:07:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 13:07:06,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-14 13:07:06,315 INFO L175 Difference]: Start difference. First operand has 206 places, 267 transitions, 3219 flow. Second operand 7 states and 108 transitions. [2024-06-14 13:07:06,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 290 transitions, 3873 flow [2024-06-14 13:07:07,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 290 transitions, 3806 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:07,271 INFO L231 Difference]: Finished difference. Result has 209 places, 267 transitions, 3215 flow [2024-06-14 13:07:07,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3215, PETRI_PLACES=209, PETRI_TRANSITIONS=267} [2024-06-14 13:07:07,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 13:07:07,272 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 267 transitions, 3215 flow [2024-06-14 13:07:07,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:07,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:07,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:07,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:07:07,273 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:07,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1941660742, now seen corresponding path program 4 times [2024-06-14 13:07:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:07,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341619169] [2024-06-14 13:07:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:09,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:09,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341619169] [2024-06-14 13:07:09,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341619169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:09,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:09,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500122855] [2024-06-14 13:07:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:09,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:09,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 267 transitions, 3215 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:09,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:09,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:09,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:12,239 INFO L124 PetriNetUnfolderBase]: 6304/9780 cut-off events. [2024-06-14 13:07:12,240 INFO L125 PetriNetUnfolderBase]: For 601673/601679 co-relation queries the response was YES. [2024-06-14 13:07:12,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61334 conditions, 9780 events. 6304/9780 cut-off events. For 601673/601679 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 60057 event pairs, 2416 based on Foata normal form. 42/9822 useless extension candidates. Maximal degree in co-relation 61236. Up to 8284 conditions per place. [2024-06-14 13:07:12,307 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 116 changer transitions 2/303 dead transitions. [2024-06-14 13:07:12,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 303 transitions, 4025 flow [2024-06-14 13:07:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:07:12,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 13:07:12,309 INFO L175 Difference]: Start difference. First operand has 209 places, 267 transitions, 3215 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:07:12,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 303 transitions, 4025 flow [2024-06-14 13:07:13,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 303 transitions, 3949 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:13,112 INFO L231 Difference]: Finished difference. Result has 212 places, 265 transitions, 3360 flow [2024-06-14 13:07:13,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3360, PETRI_PLACES=212, PETRI_TRANSITIONS=265} [2024-06-14 13:07:13,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-14 13:07:13,113 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 265 transitions, 3360 flow [2024-06-14 13:07:13,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:13,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:13,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:13,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:07:13,114 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:13,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1797246976, now seen corresponding path program 5 times [2024-06-14 13:07:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:13,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911830576] [2024-06-14 13:07:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:15,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911830576] [2024-06-14 13:07:15,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911830576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:15,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:15,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396270662] [2024-06-14 13:07:15,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:15,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:15,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 265 transitions, 3360 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:15,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:15,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:18,263 INFO L124 PetriNetUnfolderBase]: 6180/9620 cut-off events. [2024-06-14 13:07:18,263 INFO L125 PetriNetUnfolderBase]: For 586584/586590 co-relation queries the response was YES. [2024-06-14 13:07:18,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60101 conditions, 9620 events. 6180/9620 cut-off events. For 586584/586590 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 59225 event pairs, 2348 based on Foata normal form. 42/9662 useless extension candidates. Maximal degree in co-relation 60002. Up to 8224 conditions per place. [2024-06-14 13:07:18,345 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 188 selfloop transitions, 121 changer transitions 2/314 dead transitions. [2024-06-14 13:07:18,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 314 transitions, 4316 flow [2024-06-14 13:07:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:07:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:07:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-14 13:07:18,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-14 13:07:18,347 INFO L175 Difference]: Start difference. First operand has 212 places, 265 transitions, 3360 flow. Second operand 11 states and 171 transitions. [2024-06-14 13:07:18,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 314 transitions, 4316 flow [2024-06-14 13:07:19,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 314 transitions, 4112 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:19,132 INFO L231 Difference]: Finished difference. Result has 215 places, 268 transitions, 3479 flow [2024-06-14 13:07:19,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3479, PETRI_PLACES=215, PETRI_TRANSITIONS=268} [2024-06-14 13:07:19,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-14 13:07:19,133 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 268 transitions, 3479 flow [2024-06-14 13:07:19,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:19,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:19,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:19,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:07:19,134 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:19,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1764230692, now seen corresponding path program 6 times [2024-06-14 13:07:19,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:19,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38142544] [2024-06-14 13:07:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:19,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:21,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:21,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38142544] [2024-06-14 13:07:21,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38142544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:21,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:21,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186795216] [2024-06-14 13:07:21,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:21,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:21,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:21,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 268 transitions, 3479 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:21,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:21,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:21,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:23,996 INFO L124 PetriNetUnfolderBase]: 5996/9341 cut-off events. [2024-06-14 13:07:23,996 INFO L125 PetriNetUnfolderBase]: For 535754/535780 co-relation queries the response was YES. [2024-06-14 13:07:24,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58356 conditions, 9341 events. 5996/9341 cut-off events. For 535754/535780 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 57403 event pairs, 2317 based on Foata normal form. 30/9371 useless extension candidates. Maximal degree in co-relation 58257. Up to 8988 conditions per place. [2024-06-14 13:07:24,072 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 69 changer transitions 3/293 dead transitions. [2024-06-14 13:07:24,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 293 transitions, 4136 flow [2024-06-14 13:07:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:07:24,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:07:24,074 INFO L175 Difference]: Start difference. First operand has 215 places, 268 transitions, 3479 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:07:24,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 293 transitions, 4136 flow [2024-06-14 13:07:25,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 293 transitions, 3878 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:07:25,047 INFO L231 Difference]: Finished difference. Result has 214 places, 265 transitions, 3316 flow [2024-06-14 13:07:25,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3316, PETRI_PLACES=214, PETRI_TRANSITIONS=265} [2024-06-14 13:07:25,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-14 13:07:25,048 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 265 transitions, 3316 flow [2024-06-14 13:07:25,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:25,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:25,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:25,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:07:25,049 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:25,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:25,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1764350662, now seen corresponding path program 7 times [2024-06-14 13:07:25,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:25,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859191290] [2024-06-14 13:07:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:25,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:27,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:27,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859191290] [2024-06-14 13:07:27,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859191290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:27,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:27,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:27,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547055497] [2024-06-14 13:07:27,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:27,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:27,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:27,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:27,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:27,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 265 transitions, 3316 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:27,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:27,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:27,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:29,687 INFO L124 PetriNetUnfolderBase]: 5624/8757 cut-off events. [2024-06-14 13:07:29,687 INFO L125 PetriNetUnfolderBase]: For 534040/534066 co-relation queries the response was YES. [2024-06-14 13:07:29,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55549 conditions, 8757 events. 5624/8757 cut-off events. For 534040/534066 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 53026 event pairs, 1707 based on Foata normal form. 20/8777 useless extension candidates. Maximal degree in co-relation 55449. Up to 7242 conditions per place. [2024-06-14 13:07:29,746 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 123 changer transitions 3/296 dead transitions. [2024-06-14 13:07:29,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 296 transitions, 3995 flow [2024-06-14 13:07:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:07:29,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 13:07:29,747 INFO L175 Difference]: Start difference. First operand has 214 places, 265 transitions, 3316 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:07:29,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 296 transitions, 3995 flow [2024-06-14 13:07:30,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 296 transitions, 3678 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 13:07:30,596 INFO L231 Difference]: Finished difference. Result has 212 places, 263 transitions, 3228 flow [2024-06-14 13:07:30,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3228, PETRI_PLACES=212, PETRI_TRANSITIONS=263} [2024-06-14 13:07:30,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-14 13:07:30,598 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 263 transitions, 3228 flow [2024-06-14 13:07:30,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:30,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:30,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:30,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:07:30,598 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:30,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:30,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2126278918, now seen corresponding path program 1 times [2024-06-14 13:07:30,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:30,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758024210] [2024-06-14 13:07:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:30,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:33,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:33,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758024210] [2024-06-14 13:07:33,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758024210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:33,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:33,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:33,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774138554] [2024-06-14 13:07:33,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:33,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:33,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:33,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:33,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 263 transitions, 3228 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:33,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:33,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:33,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:35,506 INFO L124 PetriNetUnfolderBase]: 5420/8444 cut-off events. [2024-06-14 13:07:35,506 INFO L125 PetriNetUnfolderBase]: For 556544/556550 co-relation queries the response was YES. [2024-06-14 13:07:35,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54988 conditions, 8444 events. 5420/8444 cut-off events. For 556544/556550 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 50822 event pairs, 2255 based on Foata normal form. 14/8458 useless extension candidates. Maximal degree in co-relation 54888. Up to 8131 conditions per place. [2024-06-14 13:07:35,580 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 254 selfloop transitions, 32 changer transitions 0/289 dead transitions. [2024-06-14 13:07:35,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 289 transitions, 3916 flow [2024-06-14 13:07:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:07:35,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-14 13:07:35,582 INFO L175 Difference]: Start difference. First operand has 212 places, 263 transitions, 3228 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:07:35,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 289 transitions, 3916 flow [2024-06-14 13:07:36,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 289 transitions, 3595 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:07:36,486 INFO L231 Difference]: Finished difference. Result has 210 places, 264 transitions, 3001 flow [2024-06-14 13:07:36,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3001, PETRI_PLACES=210, PETRI_TRANSITIONS=264} [2024-06-14 13:07:36,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-14 13:07:36,487 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 264 transitions, 3001 flow [2024-06-14 13:07:36,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:36,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:36,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:36,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:07:36,487 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:36,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 421847126, now seen corresponding path program 1 times [2024-06-14 13:07:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:36,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464913440] [2024-06-14 13:07:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:39,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464913440] [2024-06-14 13:07:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464913440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:39,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:39,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:39,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005411430] [2024-06-14 13:07:39,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:39,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:39,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:39,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:39,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:39,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:39,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 264 transitions, 3001 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:39,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:39,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:39,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:41,463 INFO L124 PetriNetUnfolderBase]: 5408/8428 cut-off events. [2024-06-14 13:07:41,463 INFO L125 PetriNetUnfolderBase]: For 557388/557394 co-relation queries the response was YES. [2024-06-14 13:07:41,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54153 conditions, 8428 events. 5408/8428 cut-off events. For 557388/557394 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 50850 event pairs, 2098 based on Foata normal form. 10/8438 useless extension candidates. Maximal degree in co-relation 54052. Up to 7976 conditions per place. [2024-06-14 13:07:41,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 80 changer transitions 0/299 dead transitions. [2024-06-14 13:07:41,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 299 transitions, 3814 flow [2024-06-14 13:07:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:07:41,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:07:41,553 INFO L175 Difference]: Start difference. First operand has 210 places, 264 transitions, 3001 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:07:41,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 299 transitions, 3814 flow [2024-06-14 13:07:42,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 299 transitions, 3730 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:42,645 INFO L231 Difference]: Finished difference. Result has 213 places, 264 transitions, 3083 flow [2024-06-14 13:07:42,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2917, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3083, PETRI_PLACES=213, PETRI_TRANSITIONS=264} [2024-06-14 13:07:42,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-14 13:07:42,646 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 264 transitions, 3083 flow [2024-06-14 13:07:42,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:42,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:42,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:07:42,646 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:42,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash 614014874, now seen corresponding path program 4 times [2024-06-14 13:07:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:42,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999566782] [2024-06-14 13:07:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:45,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:45,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999566782] [2024-06-14 13:07:45,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999566782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:45,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:45,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:45,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690096438] [2024-06-14 13:07:45,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:45,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:45,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:45,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 264 transitions, 3083 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:45,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:45,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:45,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:47,769 INFO L124 PetriNetUnfolderBase]: 5426/8458 cut-off events. [2024-06-14 13:07:47,770 INFO L125 PetriNetUnfolderBase]: For 584158/584164 co-relation queries the response was YES. [2024-06-14 13:07:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54558 conditions, 8458 events. 5426/8458 cut-off events. For 584158/584164 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 51030 event pairs, 2293 based on Foata normal form. 18/8476 useless extension candidates. Maximal degree in co-relation 54456. Up to 8219 conditions per place. [2024-06-14 13:07:47,828 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 32 changer transitions 0/290 dead transitions. [2024-06-14 13:07:47,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 290 transitions, 3769 flow [2024-06-14 13:07:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:07:47,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 13:07:47,829 INFO L175 Difference]: Start difference. First operand has 213 places, 264 transitions, 3083 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:07:47,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 290 transitions, 3769 flow [2024-06-14 13:07:48,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 290 transitions, 3576 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:48,789 INFO L231 Difference]: Finished difference. Result has 214 places, 265 transitions, 2987 flow [2024-06-14 13:07:48,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2987, PETRI_PLACES=214, PETRI_TRANSITIONS=265} [2024-06-14 13:07:48,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-14 13:07:48,791 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 265 transitions, 2987 flow [2024-06-14 13:07:48,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:48,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:48,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:48,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:07:48,792 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:48,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:48,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1828719810, now seen corresponding path program 8 times [2024-06-14 13:07:48,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:48,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325783939] [2024-06-14 13:07:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:51,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325783939] [2024-06-14 13:07:51,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325783939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:51,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:51,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:51,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372751638] [2024-06-14 13:07:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:51,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:51,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:51,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:51,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:51,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 265 transitions, 2987 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:51,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:51,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:51,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:53,670 INFO L124 PetriNetUnfolderBase]: 5486/8538 cut-off events. [2024-06-14 13:07:53,670 INFO L125 PetriNetUnfolderBase]: For 602134/602140 co-relation queries the response was YES. [2024-06-14 13:07:53,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54975 conditions, 8538 events. 5486/8538 cut-off events. For 602134/602140 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 51448 event pairs, 1965 based on Foata normal form. 18/8556 useless extension candidates. Maximal degree in co-relation 54872. Up to 6906 conditions per place. [2024-06-14 13:07:53,753 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 144 changer transitions 0/314 dead transitions. [2024-06-14 13:07:53,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 314 transitions, 4142 flow [2024-06-14 13:07:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:07:53,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-14 13:07:53,757 INFO L175 Difference]: Start difference. First operand has 214 places, 265 transitions, 2987 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:07:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 314 transitions, 4142 flow [2024-06-14 13:07:54,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 314 transitions, 4061 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:54,844 INFO L231 Difference]: Finished difference. Result has 218 places, 271 transitions, 3257 flow [2024-06-14 13:07:54,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3257, PETRI_PLACES=218, PETRI_TRANSITIONS=271} [2024-06-14 13:07:54,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 13:07:54,846 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 271 transitions, 3257 flow [2024-06-14 13:07:54,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:54,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:54,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:54,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:07:54,847 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:54,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:54,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1297676568, now seen corresponding path program 2 times [2024-06-14 13:07:54,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:54,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015121394] [2024-06-14 13:07:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:54,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:57,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015121394] [2024-06-14 13:07:57,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015121394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:57,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:57,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474825003] [2024-06-14 13:07:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:57,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:57,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:57,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:07:57,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 271 transitions, 3257 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:57,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:57,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:07:57,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:59,800 INFO L124 PetriNetUnfolderBase]: 5506/8566 cut-off events. [2024-06-14 13:07:59,801 INFO L125 PetriNetUnfolderBase]: For 610087/610093 co-relation queries the response was YES. [2024-06-14 13:07:59,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56184 conditions, 8566 events. 5506/8566 cut-off events. For 610087/610093 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 51656 event pairs, 2077 based on Foata normal form. 10/8576 useless extension candidates. Maximal degree in co-relation 56080. Up to 8106 conditions per place. [2024-06-14 13:07:59,870 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 81 changer transitions 0/302 dead transitions. [2024-06-14 13:07:59,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 302 transitions, 4100 flow [2024-06-14 13:07:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:07:59,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:07:59,872 INFO L175 Difference]: Start difference. First operand has 218 places, 271 transitions, 3257 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:07:59,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 302 transitions, 4100 flow [2024-06-14 13:08:00,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 302 transitions, 3884 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:00,853 INFO L231 Difference]: Finished difference. Result has 220 places, 274 transitions, 3247 flow [2024-06-14 13:08:00,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3247, PETRI_PLACES=220, PETRI_TRANSITIONS=274} [2024-06-14 13:08:00,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 13:08:00,854 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 274 transitions, 3247 flow [2024-06-14 13:08:00,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:00,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:00,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:08:00,855 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:00,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1465271302, now seen corresponding path program 9 times [2024-06-14 13:08:00,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:00,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754801354] [2024-06-14 13:08:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:00,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:03,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:03,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754801354] [2024-06-14 13:08:03,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754801354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:03,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:03,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:03,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687014969] [2024-06-14 13:08:03,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:03,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:03,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:03,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:03,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:03,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:03,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 274 transitions, 3247 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:03,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:03,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:03,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:05,623 INFO L124 PetriNetUnfolderBase]: 5494/8561 cut-off events. [2024-06-14 13:08:05,623 INFO L125 PetriNetUnfolderBase]: For 621918/621946 co-relation queries the response was YES. [2024-06-14 13:08:05,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55704 conditions, 8561 events. 5494/8561 cut-off events. For 621918/621946 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 51712 event pairs, 1921 based on Foata normal form. 16/8577 useless extension candidates. Maximal degree in co-relation 55599. Up to 6540 conditions per place. [2024-06-14 13:08:05,681 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 150 changer transitions 0/310 dead transitions. [2024-06-14 13:08:05,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 310 transitions, 4396 flow [2024-06-14 13:08:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:08:05,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:08:05,683 INFO L175 Difference]: Start difference. First operand has 220 places, 274 transitions, 3247 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:08:05,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 310 transitions, 4396 flow [2024-06-14 13:08:06,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 310 transitions, 4266 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:06,751 INFO L231 Difference]: Finished difference. Result has 224 places, 280 transitions, 3586 flow [2024-06-14 13:08:06,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3586, PETRI_PLACES=224, PETRI_TRANSITIONS=280} [2024-06-14 13:08:06,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-14 13:08:06,752 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 280 transitions, 3586 flow [2024-06-14 13:08:06,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:06,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:06,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:06,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:08:06,753 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:06,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1132112646, now seen corresponding path program 10 times [2024-06-14 13:08:06,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:06,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233030595] [2024-06-14 13:08:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:06,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:09,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:09,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233030595] [2024-06-14 13:08:09,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233030595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:09,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:09,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:09,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108162324] [2024-06-14 13:08:09,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:09,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:09,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:09,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:09,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 280 transitions, 3586 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:09,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:09,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:09,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:11,584 INFO L124 PetriNetUnfolderBase]: 5514/8585 cut-off events. [2024-06-14 13:08:11,584 INFO L125 PetriNetUnfolderBase]: For 651429/651457 co-relation queries the response was YES. [2024-06-14 13:08:11,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58348 conditions, 8585 events. 5514/8585 cut-off events. For 651429/651457 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51881 event pairs, 2115 based on Foata normal form. 22/8607 useless extension candidates. Maximal degree in co-relation 58241. Up to 8102 conditions per place. [2024-06-14 13:08:11,662 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 221 selfloop transitions, 84 changer transitions 0/308 dead transitions. [2024-06-14 13:08:11,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 308 transitions, 4437 flow [2024-06-14 13:08:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:08:11,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 13:08:11,664 INFO L175 Difference]: Start difference. First operand has 224 places, 280 transitions, 3586 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:08:11,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 308 transitions, 4437 flow [2024-06-14 13:08:12,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 308 transitions, 4273 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:12,946 INFO L231 Difference]: Finished difference. Result has 229 places, 283 transitions, 3642 flow [2024-06-14 13:08:12,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3642, PETRI_PLACES=229, PETRI_TRANSITIONS=283} [2024-06-14 13:08:12,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 13:08:12,962 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 283 transitions, 3642 flow [2024-06-14 13:08:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:12,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:12,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:08:12,963 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:12,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash 25833580, now seen corresponding path program 3 times [2024-06-14 13:08:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:12,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020859458] [2024-06-14 13:08:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:15,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:15,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020859458] [2024-06-14 13:08:15,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020859458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:15,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:15,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708255587] [2024-06-14 13:08:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:15,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:15,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:15,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 283 transitions, 3642 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:15,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:15,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:15,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:17,841 INFO L124 PetriNetUnfolderBase]: 5534/8613 cut-off events. [2024-06-14 13:08:17,841 INFO L125 PetriNetUnfolderBase]: For 671908/671936 co-relation queries the response was YES. [2024-06-14 13:08:17,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58947 conditions, 8613 events. 5534/8613 cut-off events. For 671908/671936 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 51995 event pairs, 2119 based on Foata normal form. 22/8635 useless extension candidates. Maximal degree in co-relation 58837. Up to 8134 conditions per place. [2024-06-14 13:08:17,910 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 84 changer transitions 0/313 dead transitions. [2024-06-14 13:08:17,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 313 transitions, 4521 flow [2024-06-14 13:08:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 13:08:17,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-14 13:08:17,912 INFO L175 Difference]: Start difference. First operand has 229 places, 283 transitions, 3642 flow. Second operand 9 states and 133 transitions. [2024-06-14 13:08:17,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 313 transitions, 4521 flow [2024-06-14 13:08:18,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 313 transitions, 4345 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:18,964 INFO L231 Difference]: Finished difference. Result has 232 places, 286 transitions, 3688 flow [2024-06-14 13:08:18,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3688, PETRI_PLACES=232, PETRI_TRANSITIONS=286} [2024-06-14 13:08:18,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-14 13:08:18,964 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 286 transitions, 3688 flow [2024-06-14 13:08:18,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:18,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:18,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:18,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:08:18,965 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:18,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:18,965 INFO L85 PathProgramCache]: Analyzing trace with hash -303674790, now seen corresponding path program 4 times [2024-06-14 13:08:18,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:18,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928077086] [2024-06-14 13:08:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:18,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:21,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:21,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928077086] [2024-06-14 13:08:21,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928077086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:21,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:21,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:21,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774533381] [2024-06-14 13:08:21,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:21,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:21,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:21,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:21,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:21,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 286 transitions, 3688 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:21,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:21,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:21,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:24,011 INFO L124 PetriNetUnfolderBase]: 5522/8597 cut-off events. [2024-06-14 13:08:24,012 INFO L125 PetriNetUnfolderBase]: For 683759/683787 co-relation queries the response was YES. [2024-06-14 13:08:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58906 conditions, 8597 events. 5522/8597 cut-off events. For 683759/683787 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 51900 event pairs, 2107 based on Foata normal form. 22/8619 useless extension candidates. Maximal degree in co-relation 58795. Up to 8126 conditions per place. [2024-06-14 13:08:24,072 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 220 selfloop transitions, 86 changer transitions 0/309 dead transitions. [2024-06-14 13:08:24,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 309 transitions, 4375 flow [2024-06-14 13:08:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:08:24,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 13:08:24,074 INFO L175 Difference]: Start difference. First operand has 232 places, 286 transitions, 3688 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:08:24,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 309 transitions, 4375 flow [2024-06-14 13:08:25,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 309 transitions, 4115 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:08:25,182 INFO L231 Difference]: Finished difference. Result has 232 places, 286 transitions, 3606 flow [2024-06-14 13:08:25,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3606, PETRI_PLACES=232, PETRI_TRANSITIONS=286} [2024-06-14 13:08:25,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-14 13:08:25,183 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 286 transitions, 3606 flow [2024-06-14 13:08:25,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:25,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:25,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:25,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:08:25,184 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:25,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:25,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1125683556, now seen corresponding path program 11 times [2024-06-14 13:08:25,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:25,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018405710] [2024-06-14 13:08:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:25,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:27,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:27,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018405710] [2024-06-14 13:08:27,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018405710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:27,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:27,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:27,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669192574] [2024-06-14 13:08:27,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:27,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:27,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:27,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:27,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:27,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:27,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 286 transitions, 3606 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:27,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:27,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:27,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:29,616 INFO L124 PetriNetUnfolderBase]: 5510/8581 cut-off events. [2024-06-14 13:08:29,616 INFO L125 PetriNetUnfolderBase]: For 695192/695220 co-relation queries the response was YES. [2024-06-14 13:08:29,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58564 conditions, 8581 events. 5510/8581 cut-off events. For 695192/695220 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 51856 event pairs, 2103 based on Foata normal form. 22/8603 useless extension candidates. Maximal degree in co-relation 58453. Up to 8046 conditions per place. [2024-06-14 13:08:29,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 213 selfloop transitions, 96 changer transitions 0/312 dead transitions. [2024-06-14 13:08:29,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 312 transitions, 4305 flow [2024-06-14 13:08:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 13:08:29,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-14 13:08:29,696 INFO L175 Difference]: Start difference. First operand has 232 places, 286 transitions, 3606 flow. Second operand 9 states and 133 transitions. [2024-06-14 13:08:29,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 312 transitions, 4305 flow [2024-06-14 13:08:31,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 312 transitions, 4080 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:08:31,018 INFO L231 Difference]: Finished difference. Result has 233 places, 286 transitions, 3579 flow [2024-06-14 13:08:31,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3381, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3579, PETRI_PLACES=233, PETRI_TRANSITIONS=286} [2024-06-14 13:08:31,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 13:08:31,019 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 286 transitions, 3579 flow [2024-06-14 13:08:31,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:31,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:31,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:31,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:08:31,020 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:31,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:31,020 INFO L85 PathProgramCache]: Analyzing trace with hash -480560480, now seen corresponding path program 2 times [2024-06-14 13:08:31,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:31,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421203739] [2024-06-14 13:08:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:31,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:34,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:34,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421203739] [2024-06-14 13:08:34,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421203739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:34,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:34,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:34,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58103875] [2024-06-14 13:08:34,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:34,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:34,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:34,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:34,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 286 transitions, 3579 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:34,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:34,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:34,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:36,285 INFO L124 PetriNetUnfolderBase]: 5538/8622 cut-off events. [2024-06-14 13:08:36,285 INFO L125 PetriNetUnfolderBase]: For 724822/724828 co-relation queries the response was YES. [2024-06-14 13:08:36,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59214 conditions, 8622 events. 5538/8622 cut-off events. For 724822/724828 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 52088 event pairs, 2285 based on Foata normal form. 14/8636 useless extension candidates. Maximal degree in co-relation 59102. Up to 8345 conditions per place. [2024-06-14 13:08:36,356 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 278 selfloop transitions, 34 changer transitions 0/315 dead transitions. [2024-06-14 13:08:36,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 315 transitions, 4337 flow [2024-06-14 13:08:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:08:36,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-14 13:08:36,358 INFO L175 Difference]: Start difference. First operand has 233 places, 286 transitions, 3579 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:08:36,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 315 transitions, 4337 flow [2024-06-14 13:08:37,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 315 transitions, 4005 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 13:08:37,726 INFO L231 Difference]: Finished difference. Result has 231 places, 287 transitions, 3349 flow [2024-06-14 13:08:37,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3349, PETRI_PLACES=231, PETRI_TRANSITIONS=287} [2024-06-14 13:08:37,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 13:08:37,726 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 287 transitions, 3349 flow [2024-06-14 13:08:37,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:37,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:37,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:37,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:08:37,727 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:37,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1127367742, now seen corresponding path program 3 times [2024-06-14 13:08:37,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:37,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216194160] [2024-06-14 13:08:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:40,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:40,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216194160] [2024-06-14 13:08:40,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216194160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:40,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:40,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:40,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808638146] [2024-06-14 13:08:40,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:40,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:40,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:40,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:40,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:40,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 287 transitions, 3349 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:40,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:40,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:40,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:42,965 INFO L124 PetriNetUnfolderBase]: 5520/8596 cut-off events. [2024-06-14 13:08:42,966 INFO L125 PetriNetUnfolderBase]: For 724806/724812 co-relation queries the response was YES. [2024-06-14 13:08:43,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58275 conditions, 8596 events. 5520/8596 cut-off events. For 724806/724812 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51860 event pairs, 2245 based on Foata normal form. 14/8610 useless extension candidates. Maximal degree in co-relation 58162. Up to 8129 conditions per place. [2024-06-14 13:08:43,031 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 270 selfloop transitions, 41 changer transitions 0/314 dead transitions. [2024-06-14 13:08:43,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 314 transitions, 4073 flow [2024-06-14 13:08:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:08:43,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:08:43,033 INFO L175 Difference]: Start difference. First operand has 231 places, 287 transitions, 3349 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:08:43,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 314 transitions, 4073 flow [2024-06-14 13:08:44,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 314 transitions, 3985 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:44,153 INFO L231 Difference]: Finished difference. Result has 233 places, 287 transitions, 3347 flow [2024-06-14 13:08:44,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3347, PETRI_PLACES=233, PETRI_TRANSITIONS=287} [2024-06-14 13:08:44,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 13:08:44,154 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 287 transitions, 3347 flow [2024-06-14 13:08:44,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:44,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:44,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:44,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:08:44,155 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:44,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2103563630, now seen corresponding path program 1 times [2024-06-14 13:08:44,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:44,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977511629] [2024-06-14 13:08:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:44,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:47,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:47,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977511629] [2024-06-14 13:08:47,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977511629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:47,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:47,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266334497] [2024-06-14 13:08:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:47,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:47,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 287 transitions, 3347 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:47,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:47,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:47,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:49,520 INFO L124 PetriNetUnfolderBase]: 5568/8674 cut-off events. [2024-06-14 13:08:49,520 INFO L125 PetriNetUnfolderBase]: For 754871/754871 co-relation queries the response was YES. [2024-06-14 13:08:49,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59134 conditions, 8674 events. 5568/8674 cut-off events. For 754871/754871 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 52479 event pairs, 2424 based on Foata normal form. 8/8682 useless extension candidates. Maximal degree in co-relation 59020. Up to 8394 conditions per place. [2024-06-14 13:08:49,587 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 298 selfloop transitions, 21 changer transitions 0/322 dead transitions. [2024-06-14 13:08:49,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 322 transitions, 4273 flow [2024-06-14 13:08:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:08:49,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 13:08:49,589 INFO L175 Difference]: Start difference. First operand has 233 places, 287 transitions, 3347 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:08:49,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 322 transitions, 4273 flow [2024-06-14 13:08:50,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 322 transitions, 4020 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:08:50,792 INFO L231 Difference]: Finished difference. Result has 231 places, 289 transitions, 3170 flow [2024-06-14 13:08:50,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3170, PETRI_PLACES=231, PETRI_TRANSITIONS=289} [2024-06-14 13:08:50,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 13:08:50,793 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 289 transitions, 3170 flow [2024-06-14 13:08:50,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:50,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:50,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:50,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:08:50,794 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:50,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1828289096, now seen corresponding path program 1 times [2024-06-14 13:08:50,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:50,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132079466] [2024-06-14 13:08:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:50,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:54,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:54,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132079466] [2024-06-14 13:08:54,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132079466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:54,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:54,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021006323] [2024-06-14 13:08:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:54,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:54,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:54,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:08:54,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 289 transitions, 3170 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:54,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:54,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:08:54,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:56,277 INFO L124 PetriNetUnfolderBase]: 5550/8648 cut-off events. [2024-06-14 13:08:56,278 INFO L125 PetriNetUnfolderBase]: For 753405/753405 co-relation queries the response was YES. [2024-06-14 13:08:56,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57954 conditions, 8648 events. 5550/8648 cut-off events. For 753405/753405 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 52335 event pairs, 2414 based on Foata normal form. 8/8656 useless extension candidates. Maximal degree in co-relation 57842. Up to 8386 conditions per place. [2024-06-14 13:08:56,347 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 296 selfloop transitions, 22 changer transitions 0/321 dead transitions. [2024-06-14 13:08:56,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 321 transitions, 3928 flow [2024-06-14 13:08:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:08:56,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 13:08:56,349 INFO L175 Difference]: Start difference. First operand has 231 places, 289 transitions, 3170 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:08:56,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 321 transitions, 3928 flow [2024-06-14 13:08:57,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 321 transitions, 3896 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:57,957 INFO L231 Difference]: Finished difference. Result has 235 places, 289 transitions, 3187 flow [2024-06-14 13:08:57,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3187, PETRI_PLACES=235, PETRI_TRANSITIONS=289} [2024-06-14 13:08:57,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-14 13:08:57,964 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 289 transitions, 3187 flow [2024-06-14 13:08:57,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:57,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:57,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:57,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:08:57,964 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:57,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:57,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1051413738, now seen corresponding path program 2 times [2024-06-14 13:08:57,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:57,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880723736] [2024-06-14 13:08:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:57,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:00,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880723736] [2024-06-14 13:09:00,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880723736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:00,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:00,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:00,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914879875] [2024-06-14 13:09:00,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:00,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:00,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:00,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:00,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 289 transitions, 3187 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:00,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:00,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:00,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:03,094 INFO L124 PetriNetUnfolderBase]: 5532/8625 cut-off events. [2024-06-14 13:09:03,094 INFO L125 PetriNetUnfolderBase]: For 755659/755665 co-relation queries the response was YES. [2024-06-14 13:09:03,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57649 conditions, 8625 events. 5532/8625 cut-off events. For 755659/755665 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 52175 event pairs, 2374 based on Foata normal form. 14/8639 useless extension candidates. Maximal degree in co-relation 57535. Up to 8314 conditions per place. [2024-06-14 13:09:03,156 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 292 selfloop transitions, 23 changer transitions 0/318 dead transitions. [2024-06-14 13:09:03,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 318 transitions, 3929 flow [2024-06-14 13:09:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:09:03,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:09:03,158 INFO L175 Difference]: Start difference. First operand has 235 places, 289 transitions, 3187 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:09:03,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 318 transitions, 3929 flow [2024-06-14 13:09:04,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 318 transitions, 3873 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:04,614 INFO L231 Difference]: Finished difference. Result has 236 places, 289 transitions, 3181 flow [2024-06-14 13:09:04,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3181, PETRI_PLACES=236, PETRI_TRANSITIONS=289} [2024-06-14 13:09:04,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-14 13:09:04,615 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 289 transitions, 3181 flow [2024-06-14 13:09:04,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:04,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:04,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:04,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:09:04,615 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:04,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash -661442848, now seen corresponding path program 1 times [2024-06-14 13:09:04,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:04,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045370367] [2024-06-14 13:09:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:04,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:08,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:08,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045370367] [2024-06-14 13:09:08,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045370367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:08,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:08,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:08,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251864462] [2024-06-14 13:09:08,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:08,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:08,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:08,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:08,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 289 transitions, 3181 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:08,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:08,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:08,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:10,738 INFO L124 PetriNetUnfolderBase]: 5584/8700 cut-off events. [2024-06-14 13:09:10,738 INFO L125 PetriNetUnfolderBase]: For 793504/793508 co-relation queries the response was YES. [2024-06-14 13:09:10,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58435 conditions, 8700 events. 5584/8700 cut-off events. For 793504/793508 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 52647 event pairs, 2137 based on Foata normal form. 18/8718 useless extension candidates. Maximal degree in co-relation 58320. Up to 8234 conditions per place. [2024-06-14 13:09:10,801 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 72 changer transitions 0/325 dead transitions. [2024-06-14 13:09:10,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 325 transitions, 3998 flow [2024-06-14 13:09:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:09:10,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 13:09:10,811 INFO L175 Difference]: Start difference. First operand has 236 places, 289 transitions, 3181 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:09:10,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 325 transitions, 3998 flow [2024-06-14 13:09:12,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 325 transitions, 3929 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:12,256 INFO L231 Difference]: Finished difference. Result has 239 places, 291 transitions, 3327 flow [2024-06-14 13:09:12,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3327, PETRI_PLACES=239, PETRI_TRANSITIONS=291} [2024-06-14 13:09:12,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-14 13:09:12,258 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 291 transitions, 3327 flow [2024-06-14 13:09:12,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:12,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:12,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:12,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:09:12,259 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:12,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1151055520, now seen corresponding path program 2 times [2024-06-14 13:09:12,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:12,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274668843] [2024-06-14 13:09:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:15,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:15,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274668843] [2024-06-14 13:09:15,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274668843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:15,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:15,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812460336] [2024-06-14 13:09:15,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:15,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:15,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:15,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 291 transitions, 3327 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:15,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:15,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:15,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:17,884 INFO L124 PetriNetUnfolderBase]: 5605/8728 cut-off events. [2024-06-14 13:09:17,884 INFO L125 PetriNetUnfolderBase]: For 790187/790211 co-relation queries the response was YES. [2024-06-14 13:09:17,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59328 conditions, 8728 events. 5605/8728 cut-off events. For 790187/790211 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 52831 event pairs, 2004 based on Foata normal form. 22/8750 useless extension candidates. Maximal degree in co-relation 59213. Up to 8218 conditions per place. [2024-06-14 13:09:17,966 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 77 changer transitions 0/325 dead transitions. [2024-06-14 13:09:17,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 325 transitions, 4330 flow [2024-06-14 13:09:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:09:17,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:09:17,968 INFO L175 Difference]: Start difference. First operand has 239 places, 291 transitions, 3327 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:09:17,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 325 transitions, 4330 flow [2024-06-14 13:09:19,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 325 transitions, 4141 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:19,580 INFO L231 Difference]: Finished difference. Result has 240 places, 295 transitions, 3418 flow [2024-06-14 13:09:19,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3418, PETRI_PLACES=240, PETRI_TRANSITIONS=295} [2024-06-14 13:09:19,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-14 13:09:19,580 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 295 transitions, 3418 flow [2024-06-14 13:09:19,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:19,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:19,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:19,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:09:19,581 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:19,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:19,582 INFO L85 PathProgramCache]: Analyzing trace with hash -696214530, now seen corresponding path program 3 times [2024-06-14 13:09:19,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:19,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224404864] [2024-06-14 13:09:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:19,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:22,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224404864] [2024-06-14 13:09:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224404864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:22,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:22,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103042063] [2024-06-14 13:09:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:22,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:22,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:22,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:23,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:23,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 295 transitions, 3418 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:23,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:23,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:23,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:25,102 INFO L124 PetriNetUnfolderBase]: 5600/8721 cut-off events. [2024-06-14 13:09:25,103 INFO L125 PetriNetUnfolderBase]: For 745852/745876 co-relation queries the response was YES. [2024-06-14 13:09:25,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58365 conditions, 8721 events. 5600/8721 cut-off events. For 745852/745876 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 52835 event pairs, 2079 based on Foata normal form. 22/8743 useless extension candidates. Maximal degree in co-relation 58249. Up to 8386 conditions per place. [2024-06-14 13:09:25,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 247 selfloop transitions, 69 changer transitions 0/319 dead transitions. [2024-06-14 13:09:25,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 319 transitions, 4123 flow [2024-06-14 13:09:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:09:25,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 13:09:25,184 INFO L175 Difference]: Start difference. First operand has 240 places, 295 transitions, 3418 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:09:25,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 319 transitions, 4123 flow [2024-06-14 13:09:26,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 319 transitions, 3964 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:26,284 INFO L231 Difference]: Finished difference. Result has 244 places, 295 transitions, 3406 flow [2024-06-14 13:09:26,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3406, PETRI_PLACES=244, PETRI_TRANSITIONS=295} [2024-06-14 13:09:26,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-14 13:09:26,288 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 295 transitions, 3406 flow [2024-06-14 13:09:26,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:26,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:26,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:26,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:09:26,288 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:26,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:26,289 INFO L85 PathProgramCache]: Analyzing trace with hash 94164777, now seen corresponding path program 1 times [2024-06-14 13:09:26,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:26,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389978493] [2024-06-14 13:09:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:26,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:29,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:29,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389978493] [2024-06-14 13:09:29,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389978493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:29,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:29,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:29,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328270767] [2024-06-14 13:09:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:29,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:29,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:29,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 295 transitions, 3406 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:29,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:29,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:29,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:32,002 INFO L124 PetriNetUnfolderBase]: 5640/8772 cut-off events. [2024-06-14 13:09:32,002 INFO L125 PetriNetUnfolderBase]: For 780112/780116 co-relation queries the response was YES. [2024-06-14 13:09:32,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59010 conditions, 8772 events. 5640/8772 cut-off events. For 780112/780116 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 53234 event pairs, 1952 based on Foata normal form. 12/8784 useless extension candidates. Maximal degree in co-relation 58892. Up to 7076 conditions per place. [2024-06-14 13:09:32,076 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 205 selfloop transitions, 158 changer transitions 0/366 dead transitions. [2024-06-14 13:09:32,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 366 transitions, 4645 flow [2024-06-14 13:09:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:09:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:09:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 213 transitions. [2024-06-14 13:09:32,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2024-06-14 13:09:32,080 INFO L175 Difference]: Start difference. First operand has 244 places, 295 transitions, 3406 flow. Second operand 13 states and 213 transitions. [2024-06-14 13:09:32,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 366 transitions, 4645 flow [2024-06-14 13:09:33,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 366 transitions, 4477 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:33,223 INFO L231 Difference]: Finished difference. Result has 250 places, 298 transitions, 3586 flow [2024-06-14 13:09:33,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3586, PETRI_PLACES=250, PETRI_TRANSITIONS=298} [2024-06-14 13:09:33,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 13:09:33,224 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 298 transitions, 3586 flow [2024-06-14 13:09:33,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:33,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:33,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:33,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:09:33,225 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:33,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash 192360647, now seen corresponding path program 2 times [2024-06-14 13:09:33,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:33,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366603489] [2024-06-14 13:09:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:33,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:36,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:36,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366603489] [2024-06-14 13:09:36,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366603489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:36,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:36,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:36,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011510104] [2024-06-14 13:09:36,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:36,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:36,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:36,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:36,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:36,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:36,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 298 transitions, 3586 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:36,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:36,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:36,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:39,057 INFO L124 PetriNetUnfolderBase]: 5616/8740 cut-off events. [2024-06-14 13:09:39,058 INFO L125 PetriNetUnfolderBase]: For 783790/783794 co-relation queries the response was YES. [2024-06-14 13:09:39,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59395 conditions, 8740 events. 5616/8740 cut-off events. For 783790/783794 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 53059 event pairs, 1938 based on Foata normal form. 12/8752 useless extension candidates. Maximal degree in co-relation 59276. Up to 7064 conditions per place. [2024-06-14 13:09:39,139 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 204 selfloop transitions, 158 changer transitions 0/365 dead transitions. [2024-06-14 13:09:39,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 365 transitions, 4657 flow [2024-06-14 13:09:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:09:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:09:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-14 13:09:39,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882783882783883 [2024-06-14 13:09:39,142 INFO L175 Difference]: Start difference. First operand has 250 places, 298 transitions, 3586 flow. Second operand 13 states and 212 transitions. [2024-06-14 13:09:39,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 365 transitions, 4657 flow [2024-06-14 13:09:40,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 365 transitions, 4293 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 13:09:40,739 INFO L231 Difference]: Finished difference. Result has 252 places, 298 transitions, 3544 flow [2024-06-14 13:09:40,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3544, PETRI_PLACES=252, PETRI_TRANSITIONS=298} [2024-06-14 13:09:40,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-14 13:09:40,740 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 298 transitions, 3544 flow [2024-06-14 13:09:40,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:40,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:40,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:40,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:09:40,740 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:40,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash -168775810, now seen corresponding path program 4 times [2024-06-14 13:09:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:40,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159437575] [2024-06-14 13:09:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:44,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:44,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159437575] [2024-06-14 13:09:44,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159437575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:44,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:44,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:44,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240609361] [2024-06-14 13:09:44,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:44,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:44,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:44,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:44,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 298 transitions, 3544 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:44,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:44,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:44,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:46,614 INFO L124 PetriNetUnfolderBase]: 5668/8824 cut-off events. [2024-06-14 13:09:46,614 INFO L125 PetriNetUnfolderBase]: For 821721/821725 co-relation queries the response was YES. [2024-06-14 13:09:46,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60110 conditions, 8824 events. 5668/8824 cut-off events. For 821721/821725 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 53560 event pairs, 2069 based on Foata normal form. 18/8842 useless extension candidates. Maximal degree in co-relation 59990. Up to 8302 conditions per place. [2024-06-14 13:09:46,700 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 86 changer transitions 0/331 dead transitions. [2024-06-14 13:09:46,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 331 transitions, 4373 flow [2024-06-14 13:09:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:09:46,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:09:46,702 INFO L175 Difference]: Start difference. First operand has 252 places, 298 transitions, 3544 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:09:46,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 331 transitions, 4373 flow [2024-06-14 13:09:48,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 331 transitions, 4057 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 13:09:48,295 INFO L231 Difference]: Finished difference. Result has 248 places, 300 transitions, 3466 flow [2024-06-14 13:09:48,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3228, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3466, PETRI_PLACES=248, PETRI_TRANSITIONS=300} [2024-06-14 13:09:48,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-14 13:09:48,296 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 300 transitions, 3466 flow [2024-06-14 13:09:48,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:48,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:48,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:48,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:09:48,297 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:48,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash -168330340, now seen corresponding path program 5 times [2024-06-14 13:09:48,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:48,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233299497] [2024-06-14 13:09:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:48,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:51,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233299497] [2024-06-14 13:09:51,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233299497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:51,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:51,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:51,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118715519] [2024-06-14 13:09:51,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:51,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:51,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:51,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:51,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:51,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:51,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 300 transitions, 3466 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:51,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:51,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:51,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:54,106 INFO L124 PetriNetUnfolderBase]: 5792/9012 cut-off events. [2024-06-14 13:09:54,106 INFO L125 PetriNetUnfolderBase]: For 878181/878185 co-relation queries the response was YES. [2024-06-14 13:09:54,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62029 conditions, 9012 events. 5792/9012 cut-off events. For 878181/878185 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 54879 event pairs, 2077 based on Foata normal form. 18/9030 useless extension candidates. Maximal degree in co-relation 61908. Up to 8192 conditions per place. [2024-06-14 13:09:54,184 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 92 changer transitions 0/339 dead transitions. [2024-06-14 13:09:54,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 339 transitions, 4519 flow [2024-06-14 13:09:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:09:54,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:09:54,186 INFO L175 Difference]: Start difference. First operand has 248 places, 300 transitions, 3466 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:09:54,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 339 transitions, 4519 flow [2024-06-14 13:09:55,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 339 transitions, 4301 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:55,768 INFO L231 Difference]: Finished difference. Result has 250 places, 303 transitions, 3527 flow [2024-06-14 13:09:55,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3527, PETRI_PLACES=250, PETRI_TRANSITIONS=303} [2024-06-14 13:09:55,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 13:09:55,768 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 303 transitions, 3527 flow [2024-06-14 13:09:55,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:55,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:55,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:55,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:09:55,769 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:55,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash -89658413, now seen corresponding path program 3 times [2024-06-14 13:09:55,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:55,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089822166] [2024-06-14 13:09:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:55,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:58,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:58,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089822166] [2024-06-14 13:09:58,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089822166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:58,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:58,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:58,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038326987] [2024-06-14 13:09:58,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:58,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:58,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:58,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:58,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:58,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:09:58,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 303 transitions, 3527 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:58,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:58,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:09:58,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:01,635 INFO L124 PetriNetUnfolderBase]: 5896/9156 cut-off events. [2024-06-14 13:10:01,635 INFO L125 PetriNetUnfolderBase]: For 906786/906790 co-relation queries the response was YES. [2024-06-14 13:10:01,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63418 conditions, 9156 events. 5896/9156 cut-off events. For 906786/906790 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 55687 event pairs, 1997 based on Foata normal form. 12/9168 useless extension candidates. Maximal degree in co-relation 63296. Up to 7392 conditions per place. [2024-06-14 13:10:01,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 161 changer transitions 0/362 dead transitions. [2024-06-14 13:10:01,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 362 transitions, 4762 flow [2024-06-14 13:10:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:10:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:10:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2024-06-14 13:10:01,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36446886446886445 [2024-06-14 13:10:01,726 INFO L175 Difference]: Start difference. First operand has 250 places, 303 transitions, 3527 flow. Second operand 13 states and 199 transitions. [2024-06-14 13:10:01,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 362 transitions, 4762 flow [2024-06-14 13:10:03,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 362 transitions, 4606 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:03,263 INFO L231 Difference]: Finished difference. Result has 259 places, 309 transitions, 3757 flow [2024-06-14 13:10:03,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3757, PETRI_PLACES=259, PETRI_TRANSITIONS=309} [2024-06-14 13:10:03,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:10:03,264 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 309 transitions, 3757 flow [2024-06-14 13:10:03,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:03,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:03,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:03,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:10:03,265 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:03,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash 920525861, now seen corresponding path program 4 times [2024-06-14 13:10:03,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:03,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018351995] [2024-06-14 13:10:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:03,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:06,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:06,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018351995] [2024-06-14 13:10:06,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018351995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:06,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:06,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:06,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721522394] [2024-06-14 13:10:06,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:06,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:06,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:06,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:06,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:06,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:10:06,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 309 transitions, 3757 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:06,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:06,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:10:06,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:09,156 INFO L124 PetriNetUnfolderBase]: 5872/9124 cut-off events. [2024-06-14 13:10:09,156 INFO L125 PetriNetUnfolderBase]: For 908400/908404 co-relation queries the response was YES. [2024-06-14 13:10:09,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63686 conditions, 9124 events. 5872/9124 cut-off events. For 908400/908404 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 55545 event pairs, 1993 based on Foata normal form. 12/9136 useless extension candidates. Maximal degree in co-relation 63562. Up to 7380 conditions per place. [2024-06-14 13:10:09,246 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 161 changer transitions 0/361 dead transitions. [2024-06-14 13:10:09,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 361 transitions, 4784 flow [2024-06-14 13:10:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:10:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:10:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 198 transitions. [2024-06-14 13:10:09,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2024-06-14 13:10:09,248 INFO L175 Difference]: Start difference. First operand has 259 places, 309 transitions, 3757 flow. Second operand 13 states and 198 transitions. [2024-06-14 13:10:09,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 361 transitions, 4784 flow [2024-06-14 13:10:10,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 361 transitions, 4509 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:10:10,957 INFO L231 Difference]: Finished difference. Result has 263 places, 309 transitions, 3810 flow [2024-06-14 13:10:10,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3810, PETRI_PLACES=263, PETRI_TRANSITIONS=309} [2024-06-14 13:10:10,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 13:10:10,958 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 309 transitions, 3810 flow [2024-06-14 13:10:10,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:10,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:10,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:10,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:10:10,959 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:10,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:10,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1508960420, now seen corresponding path program 6 times [2024-06-14 13:10:10,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:10,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733447284] [2024-06-14 13:10:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:10,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:14,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:14,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733447284] [2024-06-14 13:10:14,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733447284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:14,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:14,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:14,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378492635] [2024-06-14 13:10:14,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:14,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:14,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:14,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:14,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:14,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:10:14,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 309 transitions, 3810 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:14,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:14,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:10:14,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:16,674 INFO L124 PetriNetUnfolderBase]: 5880/9143 cut-off events. [2024-06-14 13:10:16,674 INFO L125 PetriNetUnfolderBase]: For 916814/916840 co-relation queries the response was YES. [2024-06-14 13:10:16,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64212 conditions, 9143 events. 5880/9143 cut-off events. For 916814/916840 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 55868 event pairs, 2153 based on Foata normal form. 18/9161 useless extension candidates. Maximal degree in co-relation 64087. Up to 8666 conditions per place. [2024-06-14 13:10:16,753 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 88 changer transitions 0/333 dead transitions. [2024-06-14 13:10:16,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 333 transitions, 4603 flow [2024-06-14 13:10:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:10:16,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 13:10:16,755 INFO L175 Difference]: Start difference. First operand has 263 places, 309 transitions, 3810 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:10:16,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 333 transitions, 4603 flow [2024-06-14 13:10:18,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 333 transitions, 4281 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 13:10:18,318 INFO L231 Difference]: Finished difference. Result has 259 places, 311 transitions, 3737 flow [2024-06-14 13:10:18,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3737, PETRI_PLACES=259, PETRI_TRANSITIONS=311} [2024-06-14 13:10:18,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:10:18,318 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 311 transitions, 3737 flow [2024-06-14 13:10:18,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:18,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:18,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:10:18,319 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:18,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1959324734, now seen corresponding path program 7 times [2024-06-14 13:10:18,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:18,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440050281] [2024-06-14 13:10:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:18,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:21,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:21,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440050281] [2024-06-14 13:10:21,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440050281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:21,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:21,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:21,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180653400] [2024-06-14 13:10:21,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:21,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:21,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:10:21,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 311 transitions, 3737 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:21,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:21,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:10:21,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:23,947 INFO L124 PetriNetUnfolderBase]: 5901/9174 cut-off events. [2024-06-14 13:10:23,947 INFO L125 PetriNetUnfolderBase]: For 946222/946248 co-relation queries the response was YES. [2024-06-14 13:10:23,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64419 conditions, 9174 events. 5901/9174 cut-off events. For 946222/946248 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56061 event pairs, 2168 based on Foata normal form. 18/9192 useless extension candidates. Maximal degree in co-relation 64293. Up to 8666 conditions per place. [2024-06-14 13:10:24,018 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 95 changer transitions 0/338 dead transitions. [2024-06-14 13:10:24,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 338 transitions, 4766 flow [2024-06-14 13:10:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:10:24,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:10:24,020 INFO L175 Difference]: Start difference. First operand has 259 places, 311 transitions, 3737 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:10:24,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 338 transitions, 4766 flow [2024-06-14 13:10:25,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 338 transitions, 4533 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:25,312 INFO L231 Difference]: Finished difference. Result has 261 places, 315 transitions, 3839 flow [2024-06-14 13:10:25,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3839, PETRI_PLACES=261, PETRI_TRANSITIONS=315} [2024-06-14 13:10:25,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-14 13:10:25,313 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 315 transitions, 3839 flow [2024-06-14 13:10:25,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:25,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:25,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:25,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:10:25,314 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:25,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash -823987849, now seen corresponding path program 5 times [2024-06-14 13:10:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:25,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200662318] [2024-06-14 13:10:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:25,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:28,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:28,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200662318] [2024-06-14 13:10:28,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200662318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:28,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:28,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:28,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568813318] [2024-06-14 13:10:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:28,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:28,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:28,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:28,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:28,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:10:28,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 315 transitions, 3839 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:28,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:28,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:10:28,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:30,770 INFO L124 PetriNetUnfolderBase]: 6005/9318 cut-off events. [2024-06-14 13:10:30,770 INFO L125 PetriNetUnfolderBase]: For 1013748/1013774 co-relation queries the response was YES. [2024-06-14 13:10:30,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65942 conditions, 9318 events. 6005/9318 cut-off events. For 1013748/1013774 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 56822 event pairs, 2166 based on Foata normal form. 24/9342 useless extension candidates. Maximal degree in co-relation 65815. Up to 8683 conditions per place. [2024-06-14 13:10:30,864 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 102 changer transitions 0/359 dead transitions. [2024-06-14 13:10:30,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 359 transitions, 4888 flow [2024-06-14 13:10:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:10:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:10:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 172 transitions. [2024-06-14 13:10:30,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-14 13:10:30,866 INFO L175 Difference]: Start difference. First operand has 261 places, 315 transitions, 3839 flow. Second operand 12 states and 172 transitions. [2024-06-14 13:10:30,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 359 transitions, 4888 flow [2024-06-14 13:10:32,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 359 transitions, 4642 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:32,537 INFO L231 Difference]: Finished difference. Result has 268 places, 321 transitions, 3873 flow [2024-06-14 13:10:32,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3873, PETRI_PLACES=268, PETRI_TRANSITIONS=321} [2024-06-14 13:10:32,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 13:10:32,537 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 321 transitions, 3873 flow [2024-06-14 13:10:32,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:32,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:32,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:32,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:10:32,538 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:32,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -823982269, now seen corresponding path program 6 times [2024-06-14 13:10:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:32,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365592137] [2024-06-14 13:10:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:32,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:35,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:35,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365592137] [2024-06-14 13:10:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365592137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:35,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642504984] [2024-06-14 13:10:35,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:35,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:35,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:35,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:10:35,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 321 transitions, 3873 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:35,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:35,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:10:35,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:38,242 INFO L124 PetriNetUnfolderBase]: 5981/9286 cut-off events. [2024-06-14 13:10:38,243 INFO L125 PetriNetUnfolderBase]: For 1011610/1011634 co-relation queries the response was YES. [2024-06-14 13:10:38,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65549 conditions, 9286 events. 5981/9286 cut-off events. For 1011610/1011634 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 56706 event pairs, 2162 based on Foata normal form. 24/9310 useless extension candidates. Maximal degree in co-relation 65421. Up to 8671 conditions per place. [2024-06-14 13:10:38,322 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 253 selfloop transitions, 102 changer transitions 0/358 dead transitions. [2024-06-14 13:10:38,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 358 transitions, 4698 flow [2024-06-14 13:10:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:10:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:10:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 171 transitions. [2024-06-14 13:10:38,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-14 13:10:38,324 INFO L175 Difference]: Start difference. First operand has 268 places, 321 transitions, 3873 flow. Second operand 12 states and 171 transitions. [2024-06-14 13:10:38,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 358 transitions, 4698 flow [2024-06-14 13:10:40,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 358 transitions, 4562 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:40,128 INFO L231 Difference]: Finished difference. Result has 272 places, 321 transitions, 3947 flow [2024-06-14 13:10:40,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3737, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3947, PETRI_PLACES=272, PETRI_TRANSITIONS=321} [2024-06-14 13:10:40,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-14 13:10:40,129 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 321 transitions, 3947 flow [2024-06-14 13:10:40,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:40,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:40,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:40,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:10:40,129 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:40,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:40,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2019884114, now seen corresponding path program 8 times [2024-06-14 13:10:40,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:40,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236952010] [2024-06-14 13:10:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:40,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:43,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236952010] [2024-06-14 13:10:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236952010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:43,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:43,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:43,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774748347] [2024-06-14 13:10:43,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:43,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:43,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:43,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:10:43,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 321 transitions, 3947 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:43,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:43,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:10:43,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:45,796 INFO L124 PetriNetUnfolderBase]: 5976/9279 cut-off events. [2024-06-14 13:10:45,796 INFO L125 PetriNetUnfolderBase]: For 1010467/1010491 co-relation queries the response was YES. [2024-06-14 13:10:45,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66009 conditions, 9279 events. 5976/9279 cut-off events. For 1010467/1010491 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 56704 event pairs, 2173 based on Foata normal form. 18/9297 useless extension candidates. Maximal degree in co-relation 65879. Up to 8802 conditions per place. [2024-06-14 13:10:45,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 86 changer transitions 0/344 dead transitions. [2024-06-14 13:10:45,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 344 transitions, 4702 flow [2024-06-14 13:10:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:10:45,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:10:45,871 INFO L175 Difference]: Start difference. First operand has 272 places, 321 transitions, 3947 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:10:45,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 344 transitions, 4702 flow [2024-06-14 13:10:47,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 344 transitions, 4468 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-14 13:10:47,525 INFO L231 Difference]: Finished difference. Result has 269 places, 321 transitions, 3890 flow [2024-06-14 13:10:47,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3890, PETRI_PLACES=269, PETRI_TRANSITIONS=321} [2024-06-14 13:10:47,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-14 13:10:47,526 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 321 transitions, 3890 flow [2024-06-14 13:10:47,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:47,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:47,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:47,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:10:47,527 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:47,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:47,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413910, now seen corresponding path program 9 times [2024-06-14 13:10:47,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:47,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515032333] [2024-06-14 13:10:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:47,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:50,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:50,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515032333] [2024-06-14 13:10:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515032333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:50,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:50,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725325595] [2024-06-14 13:10:50,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:50,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:50,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:10:50,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 321 transitions, 3890 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:50,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:50,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:10:50,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:53,296 INFO L124 PetriNetUnfolderBase]: 5984/9291 cut-off events. [2024-06-14 13:10:53,296 INFO L125 PetriNetUnfolderBase]: For 1034949/1034973 co-relation queries the response was YES. [2024-06-14 13:10:53,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66332 conditions, 9291 events. 5984/9291 cut-off events. For 1034949/1034973 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 56779 event pairs, 2171 based on Foata normal form. 18/9309 useless extension candidates. Maximal degree in co-relation 66201. Up to 8736 conditions per place. [2024-06-14 13:10:53,391 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 93 changer transitions 0/351 dead transitions. [2024-06-14 13:10:53,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 351 transitions, 4763 flow [2024-06-14 13:10:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:10:53,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:10:53,392 INFO L175 Difference]: Start difference. First operand has 269 places, 321 transitions, 3890 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:10:53,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 351 transitions, 4763 flow [2024-06-14 13:10:55,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 351 transitions, 4571 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:55,655 INFO L231 Difference]: Finished difference. Result has 270 places, 323 transitions, 3963 flow [2024-06-14 13:10:55,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3963, PETRI_PLACES=270, PETRI_TRANSITIONS=323} [2024-06-14 13:10:55,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-14 13:10:55,656 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 323 transitions, 3963 flow [2024-06-14 13:10:55,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:55,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:55,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:55,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:10:55,656 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:55,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2020097673, now seen corresponding path program 7 times [2024-06-14 13:10:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:55,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532939671] [2024-06-14 13:10:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:58,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:58,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532939671] [2024-06-14 13:10:58,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532939671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:58,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:58,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:58,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462807549] [2024-06-14 13:10:58,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:58,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:58,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:58,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:58,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:58,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:10:58,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 323 transitions, 3963 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:58,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:58,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:10:58,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:01,254 INFO L124 PetriNetUnfolderBase]: 6024/9347 cut-off events. [2024-06-14 13:11:01,254 INFO L125 PetriNetUnfolderBase]: For 1081340/1081364 co-relation queries the response was YES. [2024-06-14 13:11:01,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67007 conditions, 9347 events. 6024/9347 cut-off events. For 1081340/1081364 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 57123 event pairs, 2157 based on Foata normal form. 24/9371 useless extension candidates. Maximal degree in co-relation 66875. Up to 8760 conditions per place. [2024-06-14 13:11:01,348 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 265 selfloop transitions, 93 changer transitions 0/361 dead transitions. [2024-06-14 13:11:01,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 361 transitions, 4992 flow [2024-06-14 13:11:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-06-14 13:11:01,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463203463203463 [2024-06-14 13:11:01,350 INFO L175 Difference]: Start difference. First operand has 270 places, 323 transitions, 3963 flow. Second operand 11 states and 160 transitions. [2024-06-14 13:11:01,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 361 transitions, 4992 flow [2024-06-14 13:11:03,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 361 transitions, 4743 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:03,174 INFO L231 Difference]: Finished difference. Result has 275 places, 326 transitions, 3944 flow [2024-06-14 13:11:03,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3944, PETRI_PLACES=275, PETRI_TRANSITIONS=326} [2024-06-14 13:11:03,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 13:11:03,175 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 326 transitions, 3944 flow [2024-06-14 13:11:03,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:03,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:03,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:11:03,175 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:03,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2020092093, now seen corresponding path program 8 times [2024-06-14 13:11:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:03,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135488013] [2024-06-14 13:11:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:06,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:06,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135488013] [2024-06-14 13:11:06,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135488013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:06,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:06,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:06,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254697484] [2024-06-14 13:11:06,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:06,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:06,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:06,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:11:06,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 326 transitions, 3944 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:06,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:06,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:11:06,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:09,109 INFO L124 PetriNetUnfolderBase]: 6000/9315 cut-off events. [2024-06-14 13:11:09,110 INFO L125 PetriNetUnfolderBase]: For 1078193/1078217 co-relation queries the response was YES. [2024-06-14 13:11:09,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66410 conditions, 9315 events. 6000/9315 cut-off events. For 1078193/1078217 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 56973 event pairs, 2153 based on Foata normal form. 24/9339 useless extension candidates. Maximal degree in co-relation 66277. Up to 8748 conditions per place. [2024-06-14 13:11:09,188 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 93 changer transitions 0/363 dead transitions. [2024-06-14 13:11:09,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 363 transitions, 4781 flow [2024-06-14 13:11:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:11:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:11:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 170 transitions. [2024-06-14 13:11:09,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373015873015873 [2024-06-14 13:11:09,189 INFO L175 Difference]: Start difference. First operand has 275 places, 326 transitions, 3944 flow. Second operand 12 states and 170 transitions. [2024-06-14 13:11:09,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 363 transitions, 4781 flow [2024-06-14 13:11:10,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 363 transitions, 4521 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 13:11:10,940 INFO L231 Difference]: Finished difference. Result has 278 places, 326 transitions, 3876 flow [2024-06-14 13:11:10,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3876, PETRI_PLACES=278, PETRI_TRANSITIONS=326} [2024-06-14 13:11:10,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 13:11:10,941 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 326 transitions, 3876 flow [2024-06-14 13:11:10,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:10,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:10,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:10,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:11:10,942 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:10,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2079142052, now seen corresponding path program 10 times [2024-06-14 13:11:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:10,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934348835] [2024-06-14 13:11:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:10,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:14,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:14,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934348835] [2024-06-14 13:11:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934348835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:14,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:14,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:14,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699624863] [2024-06-14 13:11:14,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:14,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:11:14,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 326 transitions, 3876 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:14,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:14,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:11:14,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:17,069 INFO L124 PetriNetUnfolderBase]: 6008/9327 cut-off events. [2024-06-14 13:11:17,069 INFO L125 PetriNetUnfolderBase]: For 1081556/1081580 co-relation queries the response was YES. [2024-06-14 13:11:17,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66729 conditions, 9327 events. 6008/9327 cut-off events. For 1081556/1081580 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 57073 event pairs, 2096 based on Foata normal form. 18/9345 useless extension candidates. Maximal degree in co-relation 66595. Up to 8395 conditions per place. [2024-06-14 13:11:17,145 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 114 changer transitions 0/359 dead transitions. [2024-06-14 13:11:17,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 359 transitions, 5177 flow [2024-06-14 13:11:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:11:17,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:11:17,147 INFO L175 Difference]: Start difference. First operand has 278 places, 326 transitions, 3876 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:11:17,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 359 transitions, 5177 flow [2024-06-14 13:11:19,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 359 transitions, 4855 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-14 13:11:19,149 INFO L231 Difference]: Finished difference. Result has 273 places, 330 transitions, 3939 flow [2024-06-14 13:11:19,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3554, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3939, PETRI_PLACES=273, PETRI_TRANSITIONS=330} [2024-06-14 13:11:19,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-14 13:11:19,150 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 330 transitions, 3939 flow [2024-06-14 13:11:19,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:19,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:19,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:19,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:11:19,151 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:19,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2023816743, now seen corresponding path program 9 times [2024-06-14 13:11:19,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:19,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718382513] [2024-06-14 13:11:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:19,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718382513] [2024-06-14 13:11:21,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718382513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:21,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:21,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92073527] [2024-06-14 13:11:21,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:21,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:21,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:11:21,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 330 transitions, 3939 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:21,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:21,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:11:21,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:25,150 INFO L124 PetriNetUnfolderBase]: 5984/9299 cut-off events. [2024-06-14 13:11:25,150 INFO L125 PetriNetUnfolderBase]: For 1097701/1097725 co-relation queries the response was YES. [2024-06-14 13:11:25,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65883 conditions, 9299 events. 5984/9299 cut-off events. For 1097701/1097725 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 56739 event pairs, 1923 based on Foata normal form. 18/9317 useless extension candidates. Maximal degree in co-relation 65749. Up to 7130 conditions per place. [2024-06-14 13:11:25,250 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 188 selfloop transitions, 176 changer transitions 0/367 dead transitions. [2024-06-14 13:11:25,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 367 transitions, 4780 flow [2024-06-14 13:11:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-14 13:11:25,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-14 13:11:25,252 INFO L175 Difference]: Start difference. First operand has 273 places, 330 transitions, 3939 flow. Second operand 11 states and 166 transitions. [2024-06-14 13:11:25,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 367 transitions, 4780 flow [2024-06-14 13:11:27,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 367 transitions, 4399 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:27,340 INFO L231 Difference]: Finished difference. Result has 278 places, 330 transitions, 3916 flow [2024-06-14 13:11:27,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3558, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3916, PETRI_PLACES=278, PETRI_TRANSITIONS=330} [2024-06-14 13:11:27,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 13:11:27,341 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 330 transitions, 3916 flow [2024-06-14 13:11:27,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:27,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:27,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:27,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:11:27,342 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:27,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2084855972, now seen corresponding path program 11 times [2024-06-14 13:11:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:27,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897617293] [2024-06-14 13:11:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:27,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:30,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:30,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897617293] [2024-06-14 13:11:30,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897617293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:30,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:30,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:30,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020508144] [2024-06-14 13:11:30,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:30,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:30,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:30,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:30,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:11:30,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 330 transitions, 3916 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:30,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:30,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:11:30,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:32,832 INFO L124 PetriNetUnfolderBase]: 5979/9288 cut-off events. [2024-06-14 13:11:32,832 INFO L125 PetriNetUnfolderBase]: For 1092591/1092615 co-relation queries the response was YES. [2024-06-14 13:11:32,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65875 conditions, 9288 events. 5979/9288 cut-off events. For 1092591/1092615 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 56839 event pairs, 2068 based on Foata normal form. 18/9306 useless extension candidates. Maximal degree in co-relation 65741. Up to 8359 conditions per place. [2024-06-14 13:11:32,928 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 114 changer transitions 0/363 dead transitions. [2024-06-14 13:11:32,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 363 transitions, 4947 flow [2024-06-14 13:11:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:11:32,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 13:11:32,930 INFO L175 Difference]: Start difference. First operand has 278 places, 330 transitions, 3916 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:11:32,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 363 transitions, 4947 flow [2024-06-14 13:11:35,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 363 transitions, 4454 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-14 13:11:35,335 INFO L231 Difference]: Finished difference. Result has 276 places, 330 transitions, 3656 flow [2024-06-14 13:11:35,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3656, PETRI_PLACES=276, PETRI_TRANSITIONS=330} [2024-06-14 13:11:35,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 13:11:35,336 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 330 transitions, 3656 flow [2024-06-14 13:11:35,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:35,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:35,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:35,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:11:35,336 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:35,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1878121247, now seen corresponding path program 1 times [2024-06-14 13:11:35,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:35,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853099600] [2024-06-14 13:11:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:38,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:38,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853099600] [2024-06-14 13:11:38,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853099600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:38,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:38,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:38,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826633318] [2024-06-14 13:11:38,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:38,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:38,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:38,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:38,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:11:38,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 330 transitions, 3656 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:38,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:38,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:11:38,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:41,446 INFO L124 PetriNetUnfolderBase]: 5943/9226 cut-off events. [2024-06-14 13:11:41,446 INFO L125 PetriNetUnfolderBase]: For 1134569/1134591 co-relation queries the response was YES. [2024-06-14 13:11:41,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62491 conditions, 9226 events. 5943/9226 cut-off events. For 1134569/1134591 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 56014 event pairs, 1441 based on Foata normal form. 60/9286 useless extension candidates. Maximal degree in co-relation 62357. Up to 3507 conditions per place. [2024-06-14 13:11:41,534 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 128 changer transitions 17/405 dead transitions. [2024-06-14 13:11:41,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 405 transitions, 5114 flow [2024-06-14 13:11:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 13:11:41,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-14 13:11:41,536 INFO L175 Difference]: Start difference. First operand has 276 places, 330 transitions, 3656 flow. Second operand 10 states and 187 transitions. [2024-06-14 13:11:41,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 405 transitions, 5114 flow [2024-06-14 13:11:43,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 405 transitions, 4867 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:43,564 INFO L231 Difference]: Finished difference. Result has 279 places, 326 transitions, 3637 flow [2024-06-14 13:11:43,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3637, PETRI_PLACES=279, PETRI_TRANSITIONS=326} [2024-06-14 13:11:43,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-14 13:11:43,565 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 326 transitions, 3637 flow [2024-06-14 13:11:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:43,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:43,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:11:43,566 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:43,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:43,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1369114521, now seen corresponding path program 2 times [2024-06-14 13:11:43,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:43,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585920811] [2024-06-14 13:11:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:47,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:47,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585920811] [2024-06-14 13:11:47,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585920811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:47,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:47,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661964592] [2024-06-14 13:11:47,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:47,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:47,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:47,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:47,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:47,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:11:47,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 326 transitions, 3637 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:47,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:47,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:11:47,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:50,108 INFO L124 PetriNetUnfolderBase]: 6343/9838 cut-off events. [2024-06-14 13:11:50,108 INFO L125 PetriNetUnfolderBase]: For 1475307/1475329 co-relation queries the response was YES. [2024-06-14 13:11:50,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75080 conditions, 9838 events. 6343/9838 cut-off events. For 1475307/1475329 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60258 event pairs, 1405 based on Foata normal form. 28/9866 useless extension candidates. Maximal degree in co-relation 74945. Up to 3788 conditions per place. [2024-06-14 13:11:50,193 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 133 changer transitions 13/396 dead transitions. [2024-06-14 13:11:50,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 396 transitions, 5077 flow [2024-06-14 13:11:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:11:50,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:11:50,195 INFO L175 Difference]: Start difference. First operand has 279 places, 326 transitions, 3637 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:11:50,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 396 transitions, 5077 flow [2024-06-14 13:11:52,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 396 transitions, 4804 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:11:52,311 INFO L231 Difference]: Finished difference. Result has 279 places, 325 transitions, 3659 flow [2024-06-14 13:11:52,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3659, PETRI_PLACES=279, PETRI_TRANSITIONS=325} [2024-06-14 13:11:52,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-14 13:11:52,312 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 325 transitions, 3659 flow [2024-06-14 13:11:52,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:52,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:52,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:11:52,313 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:52,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1165171521, now seen corresponding path program 3 times [2024-06-14 13:11:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:52,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40446999] [2024-06-14 13:11:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:56,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:56,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40446999] [2024-06-14 13:11:56,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40446999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:56,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:56,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:56,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766776818] [2024-06-14 13:11:56,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:56,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:56,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:11:56,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 325 transitions, 3659 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:56,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:56,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:11:56,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:59,323 INFO L124 PetriNetUnfolderBase]: 6147/9534 cut-off events. [2024-06-14 13:11:59,324 INFO L125 PetriNetUnfolderBase]: For 1413534/1413556 co-relation queries the response was YES. [2024-06-14 13:11:59,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68936 conditions, 9534 events. 6147/9534 cut-off events. For 1413534/1413556 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 58081 event pairs, 1693 based on Foata normal form. 76/9610 useless extension candidates. Maximal degree in co-relation 68801. Up to 6437 conditions per place. [2024-06-14 13:11:59,411 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 124 changer transitions 22/396 dead transitions. [2024-06-14 13:11:59,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 396 transitions, 4885 flow [2024-06-14 13:11:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-14 13:11:59,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-14 13:11:59,413 INFO L175 Difference]: Start difference. First operand has 279 places, 325 transitions, 3659 flow. Second operand 11 states and 194 transitions. [2024-06-14 13:11:59,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 396 transitions, 4885 flow [2024-06-14 13:12:01,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 396 transitions, 4610 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 13:12:01,558 INFO L231 Difference]: Finished difference. Result has 277 places, 317 transitions, 3556 flow [2024-06-14 13:12:01,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3556, PETRI_PLACES=277, PETRI_TRANSITIONS=317} [2024-06-14 13:12:01,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 13:12:01,559 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 317 transitions, 3556 flow [2024-06-14 13:12:01,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:01,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:01,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:12:01,560 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:01,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1164932511, now seen corresponding path program 4 times [2024-06-14 13:12:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:01,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050507979] [2024-06-14 13:12:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:01,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:05,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:05,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050507979] [2024-06-14 13:12:05,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050507979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:05,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:05,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:05,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791749034] [2024-06-14 13:12:05,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:05,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:05,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:05,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:05,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:12:05,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 317 transitions, 3556 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:05,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:05,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:12:05,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:08,241 INFO L124 PetriNetUnfolderBase]: 5665/8776 cut-off events. [2024-06-14 13:12:08,241 INFO L125 PetriNetUnfolderBase]: For 1190586/1190608 co-relation queries the response was YES. [2024-06-14 13:12:08,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60720 conditions, 8776 events. 5665/8776 cut-off events. For 1190586/1190608 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 52665 event pairs, 1629 based on Foata normal form. 88/8864 useless extension candidates. Maximal degree in co-relation 60587. Up to 6933 conditions per place. [2024-06-14 13:12:08,315 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 118 changer transitions 33/378 dead transitions. [2024-06-14 13:12:08,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 378 transitions, 4526 flow [2024-06-14 13:12:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:12:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:12:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 13:12:08,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-14 13:12:08,317 INFO L175 Difference]: Start difference. First operand has 277 places, 317 transitions, 3556 flow. Second operand 11 states and 182 transitions. [2024-06-14 13:12:08,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 378 transitions, 4526 flow [2024-06-14 13:12:09,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 378 transitions, 4271 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 13:12:09,926 INFO L231 Difference]: Finished difference. Result has 274 places, 310 transitions, 3483 flow [2024-06-14 13:12:09,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3483, PETRI_PLACES=274, PETRI_TRANSITIONS=310} [2024-06-14 13:12:09,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-14 13:12:09,927 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 310 transitions, 3483 flow [2024-06-14 13:12:09,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:09,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:09,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:09,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:12:09,928 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:09,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1642658267, now seen corresponding path program 5 times [2024-06-14 13:12:09,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:09,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504769548] [2024-06-14 13:12:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:13,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:13,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504769548] [2024-06-14 13:12:13,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504769548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:13,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:13,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:13,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965955317] [2024-06-14 13:12:13,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:13,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:13,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:13,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:12:13,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 310 transitions, 3483 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:13,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:13,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:12:13,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:15,986 INFO L124 PetriNetUnfolderBase]: 5369/8308 cut-off events. [2024-06-14 13:12:15,986 INFO L125 PetriNetUnfolderBase]: For 941038/941059 co-relation queries the response was YES. [2024-06-14 13:12:16,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58392 conditions, 8308 events. 5369/8308 cut-off events. For 941038/941059 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 49310 event pairs, 1545 based on Foata normal form. 31/8339 useless extension candidates. Maximal degree in co-relation 58261. Up to 6925 conditions per place. [2024-06-14 13:12:16,070 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 118 changer transitions 14/357 dead transitions. [2024-06-14 13:12:16,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 357 transitions, 4359 flow [2024-06-14 13:12:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 13:12:16,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-14 13:12:16,072 INFO L175 Difference]: Start difference. First operand has 274 places, 310 transitions, 3483 flow. Second operand 10 states and 159 transitions. [2024-06-14 13:12:16,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 357 transitions, 4359 flow [2024-06-14 13:12:17,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 357 transitions, 4111 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 13:12:17,830 INFO L231 Difference]: Finished difference. Result has 267 places, 307 transitions, 3450 flow [2024-06-14 13:12:17,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3450, PETRI_PLACES=267, PETRI_TRANSITIONS=307} [2024-06-14 13:12:17,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 13:12:17,830 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 307 transitions, 3450 flow [2024-06-14 13:12:17,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:17,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:17,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:17,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:12:17,831 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:17,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1792184757, now seen corresponding path program 6 times [2024-06-14 13:12:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:17,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909608759] [2024-06-14 13:12:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:17,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:21,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909608759] [2024-06-14 13:12:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909608759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:21,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:21,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:21,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045034733] [2024-06-14 13:12:21,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:21,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:21,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:21,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:12:21,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 307 transitions, 3450 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:21,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:21,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:12:21,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:24,062 INFO L124 PetriNetUnfolderBase]: 5725/8860 cut-off events. [2024-06-14 13:12:24,063 INFO L125 PetriNetUnfolderBase]: For 1094056/1094077 co-relation queries the response was YES. [2024-06-14 13:12:24,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65103 conditions, 8860 events. 5725/8860 cut-off events. For 1094056/1094077 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 53303 event pairs, 1627 based on Foata normal form. 31/8891 useless extension candidates. Maximal degree in co-relation 64975. Up to 6757 conditions per place. [2024-06-14 13:12:24,162 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 114 changer transitions 18/363 dead transitions. [2024-06-14 13:12:24,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 363 transitions, 4562 flow [2024-06-14 13:12:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:12:24,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-14 13:12:24,164 INFO L175 Difference]: Start difference. First operand has 267 places, 307 transitions, 3450 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:12:24,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 363 transitions, 4562 flow [2024-06-14 13:12:25,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 363 transitions, 4316 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 13:12:25,991 INFO L231 Difference]: Finished difference. Result has 266 places, 302 transitions, 3410 flow [2024-06-14 13:12:25,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3410, PETRI_PLACES=266, PETRI_TRANSITIONS=302} [2024-06-14 13:12:25,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 13:12:25,992 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 302 transitions, 3410 flow [2024-06-14 13:12:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:25,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:25,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:25,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:12:25,992 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:25,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash -781568131, now seen corresponding path program 7 times [2024-06-14 13:12:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:25,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779740633] [2024-06-14 13:12:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:29,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:29,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779740633] [2024-06-14 13:12:29,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779740633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:29,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:29,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326032348] [2024-06-14 13:12:29,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:29,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:29,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:12:29,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 302 transitions, 3410 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:29,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:29,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:12:29,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:32,105 INFO L124 PetriNetUnfolderBase]: 5477/8483 cut-off events. [2024-06-14 13:12:32,105 INFO L125 PetriNetUnfolderBase]: For 1031371/1031371 co-relation queries the response was YES. [2024-06-14 13:12:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58928 conditions, 8483 events. 5477/8483 cut-off events. For 1031371/1031371 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 50919 event pairs, 1574 based on Foata normal form. 56/8539 useless extension candidates. Maximal degree in co-relation 58800. Up to 4543 conditions per place. [2024-06-14 13:12:32,184 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 89 changer transitions 40/354 dead transitions. [2024-06-14 13:12:32,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 354 transitions, 4480 flow [2024-06-14 13:12:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:12:32,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:12:32,186 INFO L175 Difference]: Start difference. First operand has 266 places, 302 transitions, 3410 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:12:32,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 354 transitions, 4480 flow [2024-06-14 13:12:33,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 354 transitions, 4245 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:12:33,871 INFO L231 Difference]: Finished difference. Result has 262 places, 276 transitions, 2998 flow [2024-06-14 13:12:33,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2998, PETRI_PLACES=262, PETRI_TRANSITIONS=276} [2024-06-14 13:12:33,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-14 13:12:33,871 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 276 transitions, 2998 flow [2024-06-14 13:12:33,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:33,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:33,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:33,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:12:33,872 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:33,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1751189549, now seen corresponding path program 1 times [2024-06-14 13:12:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:33,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349232401] [2024-06-14 13:12:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:33,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349232401] [2024-06-14 13:12:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349232401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:37,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:37,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:37,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924058178] [2024-06-14 13:12:37,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:37,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:37,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:12:37,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 276 transitions, 2998 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:37,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:37,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:12:37,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:39,510 INFO L124 PetriNetUnfolderBase]: 4887/7617 cut-off events. [2024-06-14 13:12:39,510 INFO L125 PetriNetUnfolderBase]: For 861393/861393 co-relation queries the response was YES. [2024-06-14 13:12:39,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54726 conditions, 7617 events. 4887/7617 cut-off events. For 861393/861393 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 45537 event pairs, 1650 based on Foata normal form. 8/7625 useless extension candidates. Maximal degree in co-relation 54600. Up to 6929 conditions per place. [2024-06-14 13:12:39,572 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 76 changer transitions 0/314 dead transitions. [2024-06-14 13:12:39,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 314 transitions, 3968 flow [2024-06-14 13:12:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:12:39,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 13:12:39,574 INFO L175 Difference]: Start difference. First operand has 262 places, 276 transitions, 2998 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:12:39,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 314 transitions, 3968 flow [2024-06-14 13:12:40,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 314 transitions, 3778 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-14 13:12:40,691 INFO L231 Difference]: Finished difference. Result has 253 places, 278 transitions, 3036 flow [2024-06-14 13:12:40,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3036, PETRI_PLACES=253, PETRI_TRANSITIONS=278} [2024-06-14 13:12:40,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-14 13:12:40,691 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 278 transitions, 3036 flow [2024-06-14 13:12:40,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:40,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:40,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:12:40,692 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:40,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1928445317, now seen corresponding path program 8 times [2024-06-14 13:12:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155173062] [2024-06-14 13:12:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:44,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:44,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155173062] [2024-06-14 13:12:44,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155173062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:44,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:44,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:44,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791361748] [2024-06-14 13:12:44,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:44,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:44,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:44,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:44,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:12:44,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 278 transitions, 3036 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:44,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:44,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:12:44,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:47,202 INFO L124 PetriNetUnfolderBase]: 4739/7401 cut-off events. [2024-06-14 13:12:47,203 INFO L125 PetriNetUnfolderBase]: For 775809/775809 co-relation queries the response was YES. [2024-06-14 13:12:47,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48163 conditions, 7401 events. 4739/7401 cut-off events. For 775809/775809 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43931 event pairs, 1456 based on Foata normal form. 68/7469 useless extension candidates. Maximal degree in co-relation 48042. Up to 5721 conditions per place. [2024-06-14 13:12:47,282 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 200 selfloop transitions, 69 changer transitions 47/319 dead transitions. [2024-06-14 13:12:47,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 319 transitions, 3818 flow [2024-06-14 13:12:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-14 13:12:47,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 13:12:47,284 INFO L175 Difference]: Start difference. First operand has 253 places, 278 transitions, 3036 flow. Second operand 10 states and 155 transitions. [2024-06-14 13:12:47,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 319 transitions, 3818 flow [2024-06-14 13:12:48,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 319 transitions, 3703 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:48,167 INFO L231 Difference]: Finished difference. Result has 257 places, 250 transitions, 2666 flow [2024-06-14 13:12:48,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2666, PETRI_PLACES=257, PETRI_TRANSITIONS=250} [2024-06-14 13:12:48,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-14 13:12:48,168 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 250 transitions, 2666 flow [2024-06-14 13:12:48,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:48,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:48,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:48,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:12:48,169 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:48,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash -656578901, now seen corresponding path program 9 times [2024-06-14 13:12:48,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:48,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848224360] [2024-06-14 13:12:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:48,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:52,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:52,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848224360] [2024-06-14 13:12:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848224360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:52,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798099116] [2024-06-14 13:12:52,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:52,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:52,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:52,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:52,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:12:52,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 250 transitions, 2666 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:52,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:52,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:12:52,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:54,203 INFO L124 PetriNetUnfolderBase]: 3915/6103 cut-off events. [2024-06-14 13:12:54,203 INFO L125 PetriNetUnfolderBase]: For 616573/616573 co-relation queries the response was YES. [2024-06-14 13:12:54,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38292 conditions, 6103 events. 3915/6103 cut-off events. For 616573/616573 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 35234 event pairs, 1222 based on Foata normal form. 68/6171 useless extension candidates. Maximal degree in co-relation 38170. Up to 5153 conditions per place. [2024-06-14 13:12:54,257 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 201 selfloop transitions, 57 changer transitions 29/290 dead transitions. [2024-06-14 13:12:54,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 290 transitions, 3397 flow [2024-06-14 13:12:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:12:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:12:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-14 13:12:54,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34415584415584416 [2024-06-14 13:12:54,259 INFO L175 Difference]: Start difference. First operand has 257 places, 250 transitions, 2666 flow. Second operand 11 states and 159 transitions. [2024-06-14 13:12:54,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 290 transitions, 3397 flow [2024-06-14 13:12:54,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 290 transitions, 3218 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-14 13:12:54,924 INFO L231 Difference]: Finished difference. Result has 245 places, 236 transitions, 2419 flow [2024-06-14 13:12:54,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2419, PETRI_PLACES=245, PETRI_TRANSITIONS=236} [2024-06-14 13:12:54,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-14 13:12:54,928 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 236 transitions, 2419 flow [2024-06-14 13:12:54,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:54,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:54,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:54,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:12:54,929 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:54,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:54,929 INFO L85 PathProgramCache]: Analyzing trace with hash -69434201, now seen corresponding path program 1 times [2024-06-14 13:12:54,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:54,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872543282] [2024-06-14 13:12:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:54,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:58,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:58,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872543282] [2024-06-14 13:12:58,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872543282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:58,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:58,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:58,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3317842] [2024-06-14 13:12:58,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:58,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:58,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:58,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:58,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:59,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:12:59,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 236 transitions, 2419 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:59,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:59,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:12:59,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:01,122 INFO L124 PetriNetUnfolderBase]: 3671/5763 cut-off events. [2024-06-14 13:13:01,122 INFO L125 PetriNetUnfolderBase]: For 523131/523131 co-relation queries the response was YES. [2024-06-14 13:13:01,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35563 conditions, 5763 events. 3671/5763 cut-off events. For 523131/523131 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33374 event pairs, 1164 based on Foata normal form. 56/5819 useless extension candidates. Maximal degree in co-relation 35448. Up to 4975 conditions per place. [2024-06-14 13:13:01,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 55 changer transitions 13/279 dead transitions. [2024-06-14 13:13:01,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 279 transitions, 3178 flow [2024-06-14 13:13:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:13:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:13:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-06-14 13:13:01,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-14 13:13:01,173 INFO L175 Difference]: Start difference. First operand has 245 places, 236 transitions, 2419 flow. Second operand 11 states and 161 transitions. [2024-06-14 13:13:01,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 279 transitions, 3178 flow [2024-06-14 13:13:01,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 279 transitions, 3058 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:13:01,797 INFO L231 Difference]: Finished difference. Result has 242 places, 230 transitions, 2348 flow [2024-06-14 13:13:01,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2348, PETRI_PLACES=242, PETRI_TRANSITIONS=230} [2024-06-14 13:13:01,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 13:13:01,798 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 230 transitions, 2348 flow [2024-06-14 13:13:01,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:01,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:01,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:01,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:13:01,799 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:01,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:01,799 INFO L85 PathProgramCache]: Analyzing trace with hash -656209753, now seen corresponding path program 1 times [2024-06-14 13:13:01,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:01,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698702068] [2024-06-14 13:13:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:01,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:05,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698702068] [2024-06-14 13:13:05,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698702068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:05,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:05,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:05,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434584456] [2024-06-14 13:13:05,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:05,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:05,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:05,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:05,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 230 transitions, 2348 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:05,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:05,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:05,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:07,351 INFO L124 PetriNetUnfolderBase]: 3401/5337 cut-off events. [2024-06-14 13:13:07,351 INFO L125 PetriNetUnfolderBase]: For 371724/371724 co-relation queries the response was YES. [2024-06-14 13:13:07,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32986 conditions, 5337 events. 3401/5337 cut-off events. For 371724/371724 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30547 event pairs, 1084 based on Foata normal form. 8/5345 useless extension candidates. Maximal degree in co-relation 32872. Up to 4805 conditions per place. [2024-06-14 13:13:07,399 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 59 changer transitions 0/264 dead transitions. [2024-06-14 13:13:07,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 264 transitions, 2996 flow [2024-06-14 13:13:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:13:07,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-14 13:13:07,401 INFO L175 Difference]: Start difference. First operand has 242 places, 230 transitions, 2348 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:13:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 264 transitions, 2996 flow [2024-06-14 13:13:07,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 264 transitions, 2836 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-14 13:13:07,912 INFO L231 Difference]: Finished difference. Result has 241 places, 230 transitions, 2314 flow [2024-06-14 13:13:07,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2314, PETRI_PLACES=241, PETRI_TRANSITIONS=230} [2024-06-14 13:13:07,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-14 13:13:07,913 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 230 transitions, 2314 flow [2024-06-14 13:13:07,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:07,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:07,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:07,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:13:07,914 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:07,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -997757025, now seen corresponding path program 10 times [2024-06-14 13:13:07,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:07,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766899370] [2024-06-14 13:13:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:11,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:11,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766899370] [2024-06-14 13:13:11,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766899370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:11,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:11,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117472040] [2024-06-14 13:13:11,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:11,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:11,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:11,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:11,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:11,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 230 transitions, 2314 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:11,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:11,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:11,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:13,299 INFO L124 PetriNetUnfolderBase]: 3321/5198 cut-off events. [2024-06-14 13:13:13,299 INFO L125 PetriNetUnfolderBase]: For 362202/362207 co-relation queries the response was YES. [2024-06-14 13:13:13,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31455 conditions, 5198 events. 3321/5198 cut-off events. For 362202/362207 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29426 event pairs, 1065 based on Foata normal form. 16/5214 useless extension candidates. Maximal degree in co-relation 31341. Up to 4849 conditions per place. [2024-06-14 13:13:13,344 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 41 changer transitions 17/256 dead transitions. [2024-06-14 13:13:13,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 256 transitions, 2916 flow [2024-06-14 13:13:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-14 13:13:13,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335978835978836 [2024-06-14 13:13:13,346 INFO L175 Difference]: Start difference. First operand has 241 places, 230 transitions, 2314 flow. Second operand 9 states and 127 transitions. [2024-06-14 13:13:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 256 transitions, 2916 flow [2024-06-14 13:13:13,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 256 transitions, 2766 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:13:13,875 INFO L231 Difference]: Finished difference. Result has 241 places, 223 transitions, 2159 flow [2024-06-14 13:13:13,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2159, PETRI_PLACES=241, PETRI_TRANSITIONS=223} [2024-06-14 13:13:13,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-14 13:13:13,876 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 223 transitions, 2159 flow [2024-06-14 13:13:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:13,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:13,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:13:13,877 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:13,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash 968352379, now seen corresponding path program 11 times [2024-06-14 13:13:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751559121] [2024-06-14 13:13:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:17,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:17,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751559121] [2024-06-14 13:13:17,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751559121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:17,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:17,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:17,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558462654] [2024-06-14 13:13:17,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:17,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:17,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:17,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:17,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 223 transitions, 2159 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:17,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:17,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:17,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:18,750 INFO L124 PetriNetUnfolderBase]: 3013/4694 cut-off events. [2024-06-14 13:13:18,750 INFO L125 PetriNetUnfolderBase]: For 331114/331119 co-relation queries the response was YES. [2024-06-14 13:13:18,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28375 conditions, 4694 events. 3013/4694 cut-off events. For 331114/331119 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25802 event pairs, 907 based on Foata normal form. 16/4710 useless extension candidates. Maximal degree in co-relation 28261. Up to 4345 conditions per place. [2024-06-14 13:13:18,789 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 194 selfloop transitions, 39 changer transitions 14/250 dead transitions. [2024-06-14 13:13:18,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 250 transitions, 2751 flow [2024-06-14 13:13:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-14 13:13:18,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3386243386243386 [2024-06-14 13:13:18,791 INFO L175 Difference]: Start difference. First operand has 241 places, 223 transitions, 2159 flow. Second operand 9 states and 128 transitions. [2024-06-14 13:13:18,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 250 transitions, 2751 flow [2024-06-14 13:13:19,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 250 transitions, 2659 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 13:13:19,372 INFO L231 Difference]: Finished difference. Result has 234 places, 219 transitions, 2112 flow [2024-06-14 13:13:19,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2112, PETRI_PLACES=234, PETRI_TRANSITIONS=219} [2024-06-14 13:13:19,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 13:13:19,373 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 219 transitions, 2112 flow [2024-06-14 13:13:19,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:19,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:19,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:19,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:13:19,374 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:19,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash -107812321, now seen corresponding path program 2 times [2024-06-14 13:13:19,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:19,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816112344] [2024-06-14 13:13:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:22,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816112344] [2024-06-14 13:13:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816112344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:22,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:22,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863706060] [2024-06-14 13:13:22,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:22,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:22,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:22,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 219 transitions, 2112 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:22,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:22,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:22,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:24,275 INFO L124 PetriNetUnfolderBase]: 2825/4394 cut-off events. [2024-06-14 13:13:24,275 INFO L125 PetriNetUnfolderBase]: For 303306/303311 co-relation queries the response was YES. [2024-06-14 13:13:24,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27212 conditions, 4394 events. 2825/4394 cut-off events. For 303306/303311 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23851 event pairs, 869 based on Foata normal form. 12/4406 useless extension candidates. Maximal degree in co-relation 27101. Up to 4091 conditions per place. [2024-06-14 13:13:24,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 194 selfloop transitions, 46 changer transitions 0/243 dead transitions. [2024-06-14 13:13:24,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 243 transitions, 2700 flow [2024-06-14 13:13:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-14 13:13:24,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.328042328042328 [2024-06-14 13:13:24,310 INFO L175 Difference]: Start difference. First operand has 234 places, 219 transitions, 2112 flow. Second operand 9 states and 124 transitions. [2024-06-14 13:13:24,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 243 transitions, 2700 flow [2024-06-14 13:13:24,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 243 transitions, 2608 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 13:13:24,758 INFO L231 Difference]: Finished difference. Result has 226 places, 220 transitions, 2152 flow [2024-06-14 13:13:24,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2152, PETRI_PLACES=226, PETRI_TRANSITIONS=220} [2024-06-14 13:13:24,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-14 13:13:24,763 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 220 transitions, 2152 flow [2024-06-14 13:13:24,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:24,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:24,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:24,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:13:24,764 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:24,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash 968291929, now seen corresponding path program 12 times [2024-06-14 13:13:24,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:24,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018385448] [2024-06-14 13:13:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:24,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:28,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:28,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018385448] [2024-06-14 13:13:28,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018385448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:28,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:28,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:28,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489002025] [2024-06-14 13:13:28,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:28,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:28,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:28,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:28,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:28,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 220 transitions, 2152 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:28,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:28,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:28,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:29,265 INFO L124 PetriNetUnfolderBase]: 2745/4254 cut-off events. [2024-06-14 13:13:29,265 INFO L125 PetriNetUnfolderBase]: For 268308/268313 co-relation queries the response was YES. [2024-06-14 13:13:29,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25638 conditions, 4254 events. 2745/4254 cut-off events. For 268308/268313 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22845 event pairs, 741 based on Foata normal form. 16/4270 useless extension candidates. Maximal degree in co-relation 25531. Up to 3857 conditions per place. [2024-06-14 13:13:29,299 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 34 changer transitions 24/251 dead transitions. [2024-06-14 13:13:29,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 251 transitions, 2778 flow [2024-06-14 13:13:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-14 13:13:29,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-14 13:13:29,301 INFO L175 Difference]: Start difference. First operand has 226 places, 220 transitions, 2152 flow. Second operand 9 states and 130 transitions. [2024-06-14 13:13:29,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 251 transitions, 2778 flow [2024-06-14 13:13:29,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 251 transitions, 2660 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:29,677 INFO L231 Difference]: Finished difference. Result has 228 places, 213 transitions, 2027 flow [2024-06-14 13:13:29,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2027, PETRI_PLACES=228, PETRI_TRANSITIONS=213} [2024-06-14 13:13:29,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-14 13:13:29,678 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 213 transitions, 2027 flow [2024-06-14 13:13:29,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:29,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:29,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:13:29,679 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:29,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash 128243069, now seen corresponding path program 3 times [2024-06-14 13:13:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:29,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712088302] [2024-06-14 13:13:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:29,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:33,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712088302] [2024-06-14 13:13:33,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712088302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:33,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:33,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:33,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449096385] [2024-06-14 13:13:33,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:33,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:33,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:33,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 213 transitions, 2027 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:33,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:33,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:33,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:34,359 INFO L124 PetriNetUnfolderBase]: 2559/3956 cut-off events. [2024-06-14 13:13:34,359 INFO L125 PetriNetUnfolderBase]: For 286821/286826 co-relation queries the response was YES. [2024-06-14 13:13:34,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25325 conditions, 3956 events. 2559/3956 cut-off events. For 286821/286826 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20902 event pairs, 519 based on Foata normal form. 12/3968 useless extension candidates. Maximal degree in co-relation 25217. Up to 3397 conditions per place. [2024-06-14 13:13:34,394 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 53 changer transitions 0/247 dead transitions. [2024-06-14 13:13:34,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 247 transitions, 2841 flow [2024-06-14 13:13:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 13:13:34,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-14 13:13:34,395 INFO L175 Difference]: Start difference. First operand has 228 places, 213 transitions, 2027 flow. Second operand 9 states and 133 transitions. [2024-06-14 13:13:34,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 247 transitions, 2841 flow [2024-06-14 13:13:34,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 247 transitions, 2716 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-14 13:13:34,758 INFO L231 Difference]: Finished difference. Result has 218 places, 215 transitions, 2094 flow [2024-06-14 13:13:34,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2094, PETRI_PLACES=218, PETRI_TRANSITIONS=215} [2024-06-14 13:13:34,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 13:13:34,769 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 215 transitions, 2094 flow [2024-06-14 13:13:34,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:34,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:34,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:34,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:13:34,770 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:34,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 128363225, now seen corresponding path program 2 times [2024-06-14 13:13:34,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:34,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805035922] [2024-06-14 13:13:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:34,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:37,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:37,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805035922] [2024-06-14 13:13:37,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805035922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:37,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:37,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:37,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952326060] [2024-06-14 13:13:37,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:37,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:37,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:37,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:38,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:38,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 215 transitions, 2094 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:38,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:38,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:38,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:39,435 INFO L124 PetriNetUnfolderBase]: 2587/4000 cut-off events. [2024-06-14 13:13:39,435 INFO L125 PetriNetUnfolderBase]: For 265129/265134 co-relation queries the response was YES. [2024-06-14 13:13:39,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25092 conditions, 4000 events. 2587/4000 cut-off events. For 265129/265134 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21186 event pairs, 469 based on Foata normal form. 12/4012 useless extension candidates. Maximal degree in co-relation 24989. Up to 3373 conditions per place. [2024-06-14 13:13:39,469 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 53 changer transitions 0/246 dead transitions. [2024-06-14 13:13:39,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 246 transitions, 2720 flow [2024-06-14 13:13:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:13:39,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:13:39,471 INFO L175 Difference]: Start difference. First operand has 218 places, 215 transitions, 2094 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:13:39,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 246 transitions, 2720 flow [2024-06-14 13:13:39,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 246 transitions, 2618 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:39,757 INFO L231 Difference]: Finished difference. Result has 221 places, 216 transitions, 2138 flow [2024-06-14 13:13:39,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2138, PETRI_PLACES=221, PETRI_TRANSITIONS=216} [2024-06-14 13:13:39,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 13:13:39,757 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 216 transitions, 2138 flow [2024-06-14 13:13:39,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:39,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:39,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:39,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:13:39,758 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:39,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1322984381, now seen corresponding path program 4 times [2024-06-14 13:13:39,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:39,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747460556] [2024-06-14 13:13:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:43,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747460556] [2024-06-14 13:13:43,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747460556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:43,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:43,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:43,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234409864] [2024-06-14 13:13:43,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:43,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:43,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:43,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:43,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:43,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:43,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 216 transitions, 2138 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:43,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:43,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:43,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:44,608 INFO L124 PetriNetUnfolderBase]: 2569/3974 cut-off events. [2024-06-14 13:13:44,608 INFO L125 PetriNetUnfolderBase]: For 254836/254841 co-relation queries the response was YES. [2024-06-14 13:13:44,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24578 conditions, 3974 events. 2569/3974 cut-off events. For 254836/254841 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21093 event pairs, 545 based on Foata normal form. 12/3986 useless extension candidates. Maximal degree in co-relation 24473. Up to 3573 conditions per place. [2024-06-14 13:13:44,635 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 51 changer transitions 0/244 dead transitions. [2024-06-14 13:13:44,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 244 transitions, 2722 flow [2024-06-14 13:13:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-14 13:13:44,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-14 13:13:44,637 INFO L175 Difference]: Start difference. First operand has 221 places, 216 transitions, 2138 flow. Second operand 9 states and 130 transitions. [2024-06-14 13:13:44,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 244 transitions, 2722 flow [2024-06-14 13:13:44,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 244 transitions, 2570 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:44,967 INFO L231 Difference]: Finished difference. Result has 223 places, 216 transitions, 2092 flow [2024-06-14 13:13:44,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2092, PETRI_PLACES=223, PETRI_TRANSITIONS=216} [2024-06-14 13:13:44,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-14 13:13:44,967 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 216 transitions, 2092 flow [2024-06-14 13:13:44,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:44,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:44,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:44,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:13:44,968 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:44,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1147808095, now seen corresponding path program 2 times [2024-06-14 13:13:44,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:44,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966844037] [2024-06-14 13:13:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:44,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:49,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:49,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966844037] [2024-06-14 13:13:49,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966844037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:49,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:49,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:49,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055240380] [2024-06-14 13:13:49,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:49,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:49,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:49,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:49,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 216 transitions, 2092 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:49,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:49,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:49,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:50,805 INFO L124 PetriNetUnfolderBase]: 2597/4017 cut-off events. [2024-06-14 13:13:50,805 INFO L125 PetriNetUnfolderBase]: For 253222/253222 co-relation queries the response was YES. [2024-06-14 13:13:50,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24501 conditions, 4017 events. 2597/4017 cut-off events. For 253222/253222 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21387 event pairs, 634 based on Foata normal form. 8/4025 useless extension candidates. Maximal degree in co-relation 24396. Up to 3483 conditions per place. [2024-06-14 13:13:50,840 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 196 selfloop transitions, 63 changer transitions 0/262 dead transitions. [2024-06-14 13:13:50,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 262 transitions, 2932 flow [2024-06-14 13:13:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:13:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:13:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 13:13:50,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:13:50,842 INFO L175 Difference]: Start difference. First operand has 223 places, 216 transitions, 2092 flow. Second operand 10 states and 160 transitions. [2024-06-14 13:13:50,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 262 transitions, 2932 flow [2024-06-14 13:13:51,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 262 transitions, 2820 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:13:51,111 INFO L231 Difference]: Finished difference. Result has 225 places, 217 transitions, 2146 flow [2024-06-14 13:13:51,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2146, PETRI_PLACES=225, PETRI_TRANSITIONS=217} [2024-06-14 13:13:51,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-14 13:13:51,111 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 217 transitions, 2146 flow [2024-06-14 13:13:51,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:51,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:51,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:51,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:13:51,112 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:51,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1605893335, now seen corresponding path program 3 times [2024-06-14 13:13:51,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:51,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537900832] [2024-06-14 13:13:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:51,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:55,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:55,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537900832] [2024-06-14 13:13:55,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537900832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:55,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:55,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:55,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112780083] [2024-06-14 13:13:55,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:55,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:55,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:55,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:13:55,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 217 transitions, 2146 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:55,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:55,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:13:55,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:56,916 INFO L124 PetriNetUnfolderBase]: 2569/3977 cut-off events. [2024-06-14 13:13:56,916 INFO L125 PetriNetUnfolderBase]: For 243443/243443 co-relation queries the response was YES. [2024-06-14 13:13:56,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23666 conditions, 3977 events. 2569/3977 cut-off events. For 243443/243443 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21115 event pairs, 646 based on Foata normal form. 12/3989 useless extension candidates. Maximal degree in co-relation 23560. Up to 3525 conditions per place. [2024-06-14 13:13:56,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 60 changer transitions 0/252 dead transitions. [2024-06-14 13:13:56,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 252 transitions, 2766 flow [2024-06-14 13:13:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:13:56,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 13:13:56,957 INFO L175 Difference]: Start difference. First operand has 225 places, 217 transitions, 2146 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:13:56,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 252 transitions, 2766 flow [2024-06-14 13:13:57,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 252 transitions, 2574 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 13:13:57,276 INFO L231 Difference]: Finished difference. Result has 226 places, 217 transitions, 2079 flow [2024-06-14 13:13:57,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2079, PETRI_PLACES=226, PETRI_TRANSITIONS=217} [2024-06-14 13:13:57,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-14 13:13:57,277 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 217 transitions, 2079 flow [2024-06-14 13:13:57,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:57,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:57,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:57,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:13:57,278 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:57,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1890932755, now seen corresponding path program 4 times [2024-06-14 13:13:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161629105] [2024-06-14 13:13:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:01,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161629105] [2024-06-14 13:14:01,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161629105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:01,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:01,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632379779] [2024-06-14 13:14:01,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:01,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:01,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:01,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:01,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 217 transitions, 2079 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:01,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:01,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:01,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:03,069 INFO L124 PetriNetUnfolderBase]: 2597/4021 cut-off events. [2024-06-14 13:14:03,070 INFO L125 PetriNetUnfolderBase]: For 239525/239525 co-relation queries the response was YES. [2024-06-14 13:14:03,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23534 conditions, 4021 events. 2597/4021 cut-off events. For 239525/239525 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 21400 event pairs, 498 based on Foata normal form. 8/4029 useless extension candidates. Maximal degree in co-relation 23428. Up to 3385 conditions per place. [2024-06-14 13:14:03,103 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 68 changer transitions 0/260 dead transitions. [2024-06-14 13:14:03,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 260 transitions, 2909 flow [2024-06-14 13:14:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:14:03,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 13:14:03,104 INFO L175 Difference]: Start difference. First operand has 226 places, 217 transitions, 2079 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:14:03,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 260 transitions, 2909 flow [2024-06-14 13:14:03,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 260 transitions, 2770 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:14:03,404 INFO L231 Difference]: Finished difference. Result has 226 places, 218 transitions, 2118 flow [2024-06-14 13:14:03,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2118, PETRI_PLACES=226, PETRI_TRANSITIONS=218} [2024-06-14 13:14:03,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-14 13:14:03,404 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 218 transitions, 2118 flow [2024-06-14 13:14:03,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:03,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:03,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:03,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:14:03,405 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:03,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1902360595, now seen corresponding path program 5 times [2024-06-14 13:14:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115956355] [2024-06-14 13:14:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:06,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:06,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115956355] [2024-06-14 13:14:06,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115956355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:06,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:06,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:06,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894758990] [2024-06-14 13:14:06,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:06,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:06,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:07,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:07,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 218 transitions, 2118 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:07,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:07,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:07,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:08,135 INFO L124 PetriNetUnfolderBase]: 2645/4097 cut-off events. [2024-06-14 13:14:08,136 INFO L125 PetriNetUnfolderBase]: For 259851/259851 co-relation queries the response was YES. [2024-06-14 13:14:08,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24665 conditions, 4097 events. 2645/4097 cut-off events. For 259851/259851 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21959 event pairs, 526 based on Foata normal form. 8/4105 useless extension candidates. Maximal degree in co-relation 24558. Up to 2879 conditions per place. [2024-06-14 13:14:08,170 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 179 selfloop transitions, 72 changer transitions 0/254 dead transitions. [2024-06-14 13:14:08,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 254 transitions, 2962 flow [2024-06-14 13:14:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:14:08,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 13:14:08,172 INFO L175 Difference]: Start difference. First operand has 226 places, 218 transitions, 2118 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:14:08,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 254 transitions, 2962 flow [2024-06-14 13:14:08,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 254 transitions, 2796 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:08,509 INFO L231 Difference]: Finished difference. Result has 227 places, 220 transitions, 2178 flow [2024-06-14 13:14:08,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2178, PETRI_PLACES=227, PETRI_TRANSITIONS=220} [2024-06-14 13:14:08,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-14 13:14:08,509 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 220 transitions, 2178 flow [2024-06-14 13:14:08,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:08,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:08,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:08,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:14:08,510 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:08,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:08,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1336762759, now seen corresponding path program 6 times [2024-06-14 13:14:08,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:08,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288123350] [2024-06-14 13:14:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:08,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:12,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:12,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288123350] [2024-06-14 13:14:12,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288123350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:12,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:12,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786542268] [2024-06-14 13:14:12,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:12,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:12,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:12,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:12,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 220 transitions, 2178 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:12,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:12,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:12,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:14,248 INFO L124 PetriNetUnfolderBase]: 2689/4165 cut-off events. [2024-06-14 13:14:14,249 INFO L125 PetriNetUnfolderBase]: For 276199/276199 co-relation queries the response was YES. [2024-06-14 13:14:14,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25048 conditions, 4165 events. 2689/4165 cut-off events. For 276199/276199 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22413 event pairs, 678 based on Foata normal form. 12/4177 useless extension candidates. Maximal degree in co-relation 24940. Up to 3713 conditions per place. [2024-06-14 13:14:14,283 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 58 changer transitions 0/249 dead transitions. [2024-06-14 13:14:14,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 249 transitions, 2788 flow [2024-06-14 13:14:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:14:14,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:14:14,284 INFO L175 Difference]: Start difference. First operand has 227 places, 220 transitions, 2178 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:14:14,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 249 transitions, 2788 flow [2024-06-14 13:14:14,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 249 transitions, 2684 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:14,611 INFO L231 Difference]: Finished difference. Result has 232 places, 221 transitions, 2213 flow [2024-06-14 13:14:14,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2213, PETRI_PLACES=232, PETRI_TRANSITIONS=221} [2024-06-14 13:14:14,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-14 13:14:14,611 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 221 transitions, 2213 flow [2024-06-14 13:14:14,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:14,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:14,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:14,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:14:14,612 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:14,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -253803845, now seen corresponding path program 13 times [2024-06-14 13:14:14,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:14,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384858464] [2024-06-14 13:14:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:18,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384858464] [2024-06-14 13:14:18,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384858464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:18,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:18,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802586828] [2024-06-14 13:14:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:18,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:18,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:18,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 221 transitions, 2213 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:18,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:18,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:18,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:19,727 INFO L124 PetriNetUnfolderBase]: 2917/4529 cut-off events. [2024-06-14 13:14:19,728 INFO L125 PetriNetUnfolderBase]: For 421651/421651 co-relation queries the response was YES. [2024-06-14 13:14:19,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26618 conditions, 4529 events. 2917/4529 cut-off events. For 421651/421651 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24706 event pairs, 702 based on Foata normal form. 68/4597 useless extension candidates. Maximal degree in co-relation 26508. Up to 3293 conditions per place. [2024-06-14 13:14:19,764 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 166 selfloop transitions, 92 changer transitions 5/266 dead transitions. [2024-06-14 13:14:19,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 266 transitions, 2927 flow [2024-06-14 13:14:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:14:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:14:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-14 13:14:19,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-06-14 13:14:19,766 INFO L175 Difference]: Start difference. First operand has 232 places, 221 transitions, 2213 flow. Second operand 11 states and 172 transitions. [2024-06-14 13:14:19,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 266 transitions, 2927 flow [2024-06-14 13:14:20,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 266 transitions, 2806 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:20,050 INFO L231 Difference]: Finished difference. Result has 236 places, 221 transitions, 2308 flow [2024-06-14 13:14:20,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2308, PETRI_PLACES=236, PETRI_TRANSITIONS=221} [2024-06-14 13:14:20,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-14 13:14:20,050 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 221 transitions, 2308 flow [2024-06-14 13:14:20,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:20,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:20,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:20,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:14:20,051 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:20,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash 146062613, now seen corresponding path program 3 times [2024-06-14 13:14:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:20,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535387453] [2024-06-14 13:14:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:24,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535387453] [2024-06-14 13:14:24,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535387453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:24,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:24,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:24,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033605599] [2024-06-14 13:14:24,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:24,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:24,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:24,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:24,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 221 transitions, 2308 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:24,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:24,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:24,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:25,848 INFO L124 PetriNetUnfolderBase]: 2905/4517 cut-off events. [2024-06-14 13:14:25,849 INFO L125 PetriNetUnfolderBase]: For 285076/285076 co-relation queries the response was YES. [2024-06-14 13:14:25,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27139 conditions, 4517 events. 2905/4517 cut-off events. For 285076/285076 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24772 event pairs, 748 based on Foata normal form. 8/4525 useless extension candidates. Maximal degree in co-relation 27028. Up to 3975 conditions per place. [2024-06-14 13:14:25,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 61 changer transitions 0/255 dead transitions. [2024-06-14 13:14:25,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 255 transitions, 2974 flow [2024-06-14 13:14:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:14:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:14:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-14 13:14:25,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-14 13:14:25,886 INFO L175 Difference]: Start difference. First operand has 236 places, 221 transitions, 2308 flow. Second operand 10 states and 148 transitions. [2024-06-14 13:14:25,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 255 transitions, 2974 flow [2024-06-14 13:14:26,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 255 transitions, 2765 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 13:14:26,324 INFO L231 Difference]: Finished difference. Result has 237 places, 222 transitions, 2267 flow [2024-06-14 13:14:26,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2267, PETRI_PLACES=237, PETRI_TRANSITIONS=222} [2024-06-14 13:14:26,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-14 13:14:26,325 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 222 transitions, 2267 flow [2024-06-14 13:14:26,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:26,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:26,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:26,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:14:26,326 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:26,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash -358193923, now seen corresponding path program 5 times [2024-06-14 13:14:26,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:26,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455016933] [2024-06-14 13:14:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:30,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:30,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455016933] [2024-06-14 13:14:30,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455016933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:30,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:30,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:30,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576178092] [2024-06-14 13:14:30,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:30,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:30,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:30,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:30,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 222 transitions, 2267 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:30,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:30,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:30,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:32,032 INFO L124 PetriNetUnfolderBase]: 3085/4809 cut-off events. [2024-06-14 13:14:32,032 INFO L125 PetriNetUnfolderBase]: For 415817/415817 co-relation queries the response was YES. [2024-06-14 13:14:32,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27896 conditions, 4809 events. 3085/4809 cut-off events. For 415817/415817 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 26600 event pairs, 708 based on Foata normal form. 56/4865 useless extension candidates. Maximal degree in co-relation 27784. Up to 3267 conditions per place. [2024-06-14 13:14:32,072 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 94 changer transitions 11/277 dead transitions. [2024-06-14 13:14:32,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 277 transitions, 3057 flow [2024-06-14 13:14:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:14:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:14:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-14 13:14:32,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:14:32,074 INFO L175 Difference]: Start difference. First operand has 237 places, 222 transitions, 2267 flow. Second operand 12 states and 189 transitions. [2024-06-14 13:14:32,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 277 transitions, 3057 flow [2024-06-14 13:14:32,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 277 transitions, 2903 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:14:32,603 INFO L231 Difference]: Finished difference. Result has 241 places, 222 transitions, 2330 flow [2024-06-14 13:14:32,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2330, PETRI_PLACES=241, PETRI_TRANSITIONS=222} [2024-06-14 13:14:32,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-14 13:14:32,604 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 222 transitions, 2330 flow [2024-06-14 13:14:32,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:32,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:32,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:32,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:14:32,605 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:32,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1922789225, now seen corresponding path program 6 times [2024-06-14 13:14:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:32,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78972533] [2024-06-14 13:14:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:36,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:36,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78972533] [2024-06-14 13:14:36,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78972533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:36,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:36,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:36,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634778869] [2024-06-14 13:14:36,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:36,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:36,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:36,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:36,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:36,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 222 transitions, 2330 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:36,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:36,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:36,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:38,121 INFO L124 PetriNetUnfolderBase]: 3493/5457 cut-off events. [2024-06-14 13:14:38,122 INFO L125 PetriNetUnfolderBase]: For 578734/578734 co-relation queries the response was YES. [2024-06-14 13:14:38,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34365 conditions, 5457 events. 3493/5457 cut-off events. For 578734/578734 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30652 event pairs, 868 based on Foata normal form. 56/5513 useless extension candidates. Maximal degree in co-relation 34252. Up to 2955 conditions per place. [2024-06-14 13:14:38,160 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 166 selfloop transitions, 97 changer transitions 12/278 dead transitions. [2024-06-14 13:14:38,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 278 transitions, 3286 flow [2024-06-14 13:14:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:14:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:14:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 13:14:38,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-14 13:14:38,162 INFO L175 Difference]: Start difference. First operand has 241 places, 222 transitions, 2330 flow. Second operand 11 states and 182 transitions. [2024-06-14 13:14:38,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 278 transitions, 3286 flow [2024-06-14 13:14:38,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 278 transitions, 3070 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 13:14:38,786 INFO L231 Difference]: Finished difference. Result has 242 places, 221 transitions, 2319 flow [2024-06-14 13:14:38,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2319, PETRI_PLACES=242, PETRI_TRANSITIONS=221} [2024-06-14 13:14:38,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 13:14:38,787 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 221 transitions, 2319 flow [2024-06-14 13:14:38,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:38,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:38,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:38,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:14:38,787 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:38,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash -344384167, now seen corresponding path program 4 times [2024-06-14 13:14:38,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:38,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633971411] [2024-06-14 13:14:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:38,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:42,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633971411] [2024-06-14 13:14:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633971411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:42,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:42,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200133426] [2024-06-14 13:14:42,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:42,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:42,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:42,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:42,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 221 transitions, 2319 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:42,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:42,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:42,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:44,438 INFO L124 PetriNetUnfolderBase]: 2933/4561 cut-off events. [2024-06-14 13:14:44,438 INFO L125 PetriNetUnfolderBase]: For 461657/461657 co-relation queries the response was YES. [2024-06-14 13:14:44,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31358 conditions, 4561 events. 2933/4561 cut-off events. For 461657/461657 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24865 event pairs, 874 based on Foata normal form. 8/4569 useless extension candidates. Maximal degree in co-relation 31244. Up to 4083 conditions per place. [2024-06-14 13:14:44,478 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 63 changer transitions 0/251 dead transitions. [2024-06-14 13:14:44,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 251 transitions, 2963 flow [2024-06-14 13:14:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:14:44,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:14:44,480 INFO L175 Difference]: Start difference. First operand has 242 places, 221 transitions, 2319 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:14:44,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 251 transitions, 2963 flow [2024-06-14 13:14:45,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 251 transitions, 2731 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 13:14:45,086 INFO L231 Difference]: Finished difference. Result has 242 places, 222 transitions, 2261 flow [2024-06-14 13:14:45,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2261, PETRI_PLACES=242, PETRI_TRANSITIONS=222} [2024-06-14 13:14:45,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 13:14:45,087 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 222 transitions, 2261 flow [2024-06-14 13:14:45,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:45,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:45,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:45,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:14:45,088 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:45,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash -344147017, now seen corresponding path program 5 times [2024-06-14 13:14:45,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:45,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740132250] [2024-06-14 13:14:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:48,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:48,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740132250] [2024-06-14 13:14:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740132250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:48,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:48,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98345541] [2024-06-14 13:14:48,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:48,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:48,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:48,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:48,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 222 transitions, 2261 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:48,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:48,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:48,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:49,946 INFO L124 PetriNetUnfolderBase]: 2657/4133 cut-off events. [2024-06-14 13:14:49,946 INFO L125 PetriNetUnfolderBase]: For 316010/316010 co-relation queries the response was YES. [2024-06-14 13:14:49,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25727 conditions, 4133 events. 2657/4133 cut-off events. For 316010/316010 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22234 event pairs, 534 based on Foata normal form. 8/4141 useless extension candidates. Maximal degree in co-relation 25612. Up to 2995 conditions per place. [2024-06-14 13:14:49,985 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 79 changer transitions 0/258 dead transitions. [2024-06-14 13:14:49,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 258 transitions, 3243 flow [2024-06-14 13:14:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:14:49,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 13:14:49,987 INFO L175 Difference]: Start difference. First operand has 242 places, 222 transitions, 2261 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:14:49,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 258 transitions, 3243 flow [2024-06-14 13:14:50,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 258 transitions, 3083 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:50,478 INFO L231 Difference]: Finished difference. Result has 243 places, 223 transitions, 2307 flow [2024-06-14 13:14:50,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2307, PETRI_PLACES=243, PETRI_TRANSITIONS=223} [2024-06-14 13:14:50,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-14 13:14:50,479 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 223 transitions, 2307 flow [2024-06-14 13:14:50,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:50,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:50,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:50,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:14:50,480 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:50,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:50,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2033310431, now seen corresponding path program 7 times [2024-06-14 13:14:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:50,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140043709] [2024-06-14 13:14:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:50,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140043709] [2024-06-14 13:14:54,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140043709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:54,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:54,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:54,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322981383] [2024-06-14 13:14:54,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:54,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:54,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:54,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:54,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:54,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:14:54,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 223 transitions, 2307 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:54,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:54,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:14:54,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:56,229 INFO L124 PetriNetUnfolderBase]: 2701/4208 cut-off events. [2024-06-14 13:14:56,229 INFO L125 PetriNetUnfolderBase]: For 334879/334885 co-relation queries the response was YES. [2024-06-14 13:14:56,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26223 conditions, 4208 events. 2701/4208 cut-off events. For 334879/334885 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22879 event pairs, 774 based on Foata normal form. 15/4223 useless extension candidates. Maximal degree in co-relation 26107. Up to 3785 conditions per place. [2024-06-14 13:14:56,265 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 55 changer transitions 0/250 dead transitions. [2024-06-14 13:14:56,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 250 transitions, 2917 flow [2024-06-14 13:14:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:14:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:14:56,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-14 13:14:56,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 13:14:56,266 INFO L175 Difference]: Start difference. First operand has 243 places, 223 transitions, 2307 flow. Second operand 10 states and 140 transitions. [2024-06-14 13:14:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 250 transitions, 2917 flow [2024-06-14 13:14:56,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 250 transitions, 2648 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:56,728 INFO L231 Difference]: Finished difference. Result has 246 places, 224 transitions, 2175 flow [2024-06-14 13:14:56,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2175, PETRI_PLACES=246, PETRI_TRANSITIONS=224} [2024-06-14 13:14:56,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 13:14:56,728 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 224 transitions, 2175 flow [2024-06-14 13:14:56,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:56,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:56,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:56,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:14:56,729 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:56,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1501018973, now seen corresponding path program 14 times [2024-06-14 13:14:56,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:56,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331604795] [2024-06-14 13:14:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:56,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:00,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:00,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331604795] [2024-06-14 13:15:00,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331604795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:00,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:00,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:00,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952734550] [2024-06-14 13:15:00,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:00,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:00,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:00,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:00,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 224 transitions, 2175 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:00,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:00,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:00,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:01,765 INFO L124 PetriNetUnfolderBase]: 2745/4276 cut-off events. [2024-06-14 13:15:01,766 INFO L125 PetriNetUnfolderBase]: For 340982/340988 co-relation queries the response was YES. [2024-06-14 13:15:01,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26035 conditions, 4276 events. 2745/4276 cut-off events. For 340982/340988 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23303 event pairs, 756 based on Foata normal form. 15/4291 useless extension candidates. Maximal degree in co-relation 25919. Up to 3821 conditions per place. [2024-06-14 13:15:01,808 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 63 changer transitions 0/252 dead transitions. [2024-06-14 13:15:01,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 252 transitions, 2807 flow [2024-06-14 13:15:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-06-14 13:15:01,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404761904761905 [2024-06-14 13:15:01,810 INFO L175 Difference]: Start difference. First operand has 246 places, 224 transitions, 2175 flow. Second operand 10 states and 143 transitions. [2024-06-14 13:15:01,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 252 transitions, 2807 flow [2024-06-14 13:15:02,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 252 transitions, 2690 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:02,223 INFO L231 Difference]: Finished difference. Result has 248 places, 225 transitions, 2229 flow [2024-06-14 13:15:02,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2229, PETRI_PLACES=248, PETRI_TRANSITIONS=225} [2024-06-14 13:15:02,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-14 13:15:02,224 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 225 transitions, 2229 flow [2024-06-14 13:15:02,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:02,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:02,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:02,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:15:02,226 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:02,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash -228234307, now seen corresponding path program 8 times [2024-06-14 13:15:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:02,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765948305] [2024-06-14 13:15:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:05,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:05,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765948305] [2024-06-14 13:15:05,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765948305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:05,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:05,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512707865] [2024-06-14 13:15:05,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:05,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:05,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:05,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 225 transitions, 2229 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:05,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:05,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:05,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:07,355 INFO L124 PetriNetUnfolderBase]: 2717/4236 cut-off events. [2024-06-14 13:15:07,355 INFO L125 PetriNetUnfolderBase]: For 313119/313125 co-relation queries the response was YES. [2024-06-14 13:15:07,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24982 conditions, 4236 events. 2717/4236 cut-off events. For 313119/313125 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23112 event pairs, 758 based on Foata normal form. 15/4251 useless extension candidates. Maximal degree in co-relation 24865. Up to 3813 conditions per place. [2024-06-14 13:15:07,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 57 changer transitions 0/249 dead transitions. [2024-06-14 13:15:07,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 249 transitions, 2811 flow [2024-06-14 13:15:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-14 13:15:07,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-14 13:15:07,395 INFO L175 Difference]: Start difference. First operand has 248 places, 225 transitions, 2229 flow. Second operand 9 states and 131 transitions. [2024-06-14 13:15:07,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 249 transitions, 2811 flow [2024-06-14 13:15:07,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 249 transitions, 2650 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:07,895 INFO L231 Difference]: Finished difference. Result has 249 places, 225 transitions, 2187 flow [2024-06-14 13:15:07,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2187, PETRI_PLACES=249, PETRI_TRANSITIONS=225} [2024-06-14 13:15:07,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-14 13:15:07,895 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 225 transitions, 2187 flow [2024-06-14 13:15:07,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:07,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:07,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:07,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:15:07,896 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:07,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:07,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2110490973, now seen corresponding path program 15 times [2024-06-14 13:15:07,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:07,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849952995] [2024-06-14 13:15:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:07,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:11,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849952995] [2024-06-14 13:15:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849952995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:11,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:11,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:11,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199646767] [2024-06-14 13:15:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:11,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:11,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:11,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:11,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:11,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 225 transitions, 2187 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:11,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:11,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:11,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:12,972 INFO L124 PetriNetUnfolderBase]: 2761/4304 cut-off events. [2024-06-14 13:15:12,973 INFO L125 PetriNetUnfolderBase]: For 319524/319530 co-relation queries the response was YES. [2024-06-14 13:15:13,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25247 conditions, 4304 events. 2761/4304 cut-off events. For 319524/319530 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23536 event pairs, 828 based on Foata normal form. 15/4319 useless extension candidates. Maximal degree in co-relation 25129. Up to 3381 conditions per place. [2024-06-14 13:15:13,017 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 156 selfloop transitions, 94 changer transitions 0/253 dead transitions. [2024-06-14 13:15:13,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 253 transitions, 2821 flow [2024-06-14 13:15:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 13:15:13,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-14 13:15:13,019 INFO L175 Difference]: Start difference. First operand has 249 places, 225 transitions, 2187 flow. Second operand 9 states and 136 transitions. [2024-06-14 13:15:13,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 253 transitions, 2821 flow [2024-06-14 13:15:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 253 transitions, 2681 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:13,472 INFO L231 Difference]: Finished difference. Result has 250 places, 226 transitions, 2282 flow [2024-06-14 13:15:13,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2282, PETRI_PLACES=250, PETRI_TRANSITIONS=226} [2024-06-14 13:15:13,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 13:15:13,473 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 226 transitions, 2282 flow [2024-06-14 13:15:13,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:13,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:13,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:13,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:15:13,473 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:13,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash 626043615, now seen corresponding path program 7 times [2024-06-14 13:15:13,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:13,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346146743] [2024-06-14 13:15:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:13,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:17,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346146743] [2024-06-14 13:15:17,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346146743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:17,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:17,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518936389] [2024-06-14 13:15:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:17,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:17,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:17,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 226 transitions, 2282 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:17,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:17,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:17,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:19,343 INFO L124 PetriNetUnfolderBase]: 2789/4348 cut-off events. [2024-06-14 13:15:19,344 INFO L125 PetriNetUnfolderBase]: For 316561/316567 co-relation queries the response was YES. [2024-06-14 13:15:19,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25952 conditions, 4348 events. 2789/4348 cut-off events. For 316561/316567 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23746 event pairs, 770 based on Foata normal form. 11/4359 useless extension candidates. Maximal degree in co-relation 25833. Up to 3855 conditions per place. [2024-06-14 13:15:19,382 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 66 changer transitions 0/259 dead transitions. [2024-06-14 13:15:19,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 259 transitions, 2952 flow [2024-06-14 13:15:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 156 transitions. [2024-06-14 13:15:19,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33766233766233766 [2024-06-14 13:15:19,383 INFO L175 Difference]: Start difference. First operand has 250 places, 226 transitions, 2282 flow. Second operand 11 states and 156 transitions. [2024-06-14 13:15:19,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 259 transitions, 2952 flow [2024-06-14 13:15:19,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 259 transitions, 2731 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:19,954 INFO L231 Difference]: Finished difference. Result has 254 places, 227 transitions, 2241 flow [2024-06-14 13:15:19,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2241, PETRI_PLACES=254, PETRI_TRANSITIONS=227} [2024-06-14 13:15:19,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-14 13:15:19,955 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 227 transitions, 2241 flow [2024-06-14 13:15:19,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:19,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:19,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:19,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:15:19,955 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:19,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1683330333, now seen corresponding path program 16 times [2024-06-14 13:15:19,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:19,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381482577] [2024-06-14 13:15:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:19,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:23,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:23,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381482577] [2024-06-14 13:15:23,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381482577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:23,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:23,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:23,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293059051] [2024-06-14 13:15:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:23,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:23,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:23,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 227 transitions, 2241 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:23,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:23,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:23,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:25,342 INFO L124 PetriNetUnfolderBase]: 2879/4486 cut-off events. [2024-06-14 13:15:25,343 INFO L125 PetriNetUnfolderBase]: For 367913/367919 co-relation queries the response was YES. [2024-06-14 13:15:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27451 conditions, 4486 events. 2879/4486 cut-off events. For 367913/367919 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24748 event pairs, 842 based on Foata normal form. 15/4501 useless extension candidates. Maximal degree in co-relation 27331. Up to 3259 conditions per place. [2024-06-14 13:15:25,376 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 98 changer transitions 0/261 dead transitions. [2024-06-14 13:15:25,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 261 transitions, 3131 flow [2024-06-14 13:15:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:15:25,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 13:15:25,378 INFO L175 Difference]: Start difference. First operand has 254 places, 227 transitions, 2241 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:15:25,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 261 transitions, 3131 flow [2024-06-14 13:15:25,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 261 transitions, 2963 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 13:15:25,938 INFO L231 Difference]: Finished difference. Result has 254 places, 229 transitions, 2363 flow [2024-06-14 13:15:25,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2363, PETRI_PLACES=254, PETRI_TRANSITIONS=229} [2024-06-14 13:15:25,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-14 13:15:25,939 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 229 transitions, 2363 flow [2024-06-14 13:15:25,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:25,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:25,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:25,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:15:25,940 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:25,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash -600405245, now seen corresponding path program 8 times [2024-06-14 13:15:25,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:25,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720198657] [2024-06-14 13:15:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:29,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:29,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720198657] [2024-06-14 13:15:29,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720198657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:29,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:29,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:29,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254064098] [2024-06-14 13:15:29,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:29,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:29,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:29,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 229 transitions, 2363 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:29,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:29,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:29,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:31,122 INFO L124 PetriNetUnfolderBase]: 2851/4446 cut-off events. [2024-06-14 13:15:31,122 INFO L125 PetriNetUnfolderBase]: For 336307/336313 co-relation queries the response was YES. [2024-06-14 13:15:31,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26286 conditions, 4446 events. 2851/4446 cut-off events. For 336307/336313 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24530 event pairs, 796 based on Foata normal form. 15/4461 useless extension candidates. Maximal degree in co-relation 26165. Up to 4007 conditions per place. [2024-06-14 13:15:31,161 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 192 selfloop transitions, 58 changer transitions 0/253 dead transitions. [2024-06-14 13:15:31,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 253 transitions, 2951 flow [2024-06-14 13:15:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-14 13:15:31,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-14 13:15:31,163 INFO L175 Difference]: Start difference. First operand has 254 places, 229 transitions, 2363 flow. Second operand 9 states and 130 transitions. [2024-06-14 13:15:31,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 253 transitions, 2951 flow [2024-06-14 13:15:31,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 253 transitions, 2739 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:31,706 INFO L231 Difference]: Finished difference. Result has 257 places, 229 transitions, 2272 flow [2024-06-14 13:15:31,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2272, PETRI_PLACES=257, PETRI_TRANSITIONS=229} [2024-06-14 13:15:31,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-14 13:15:31,707 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 229 transitions, 2272 flow [2024-06-14 13:15:31,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:31,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:31,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:31,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:15:31,708 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:31,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash 626043801, now seen corresponding path program 6 times [2024-06-14 13:15:31,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:31,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309958414] [2024-06-14 13:15:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:31,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:35,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:35,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309958414] [2024-06-14 13:15:35,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309958414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:35,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:35,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775262554] [2024-06-14 13:15:35,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:35,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:35,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:35,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 229 transitions, 2272 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:35,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:35,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:35,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:37,638 INFO L124 PetriNetUnfolderBase]: 2879/4490 cut-off events. [2024-06-14 13:15:37,638 INFO L125 PetriNetUnfolderBase]: For 322172/322178 co-relation queries the response was YES. [2024-06-14 13:15:37,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25935 conditions, 4490 events. 2879/4490 cut-off events. For 322172/322178 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24844 event pairs, 802 based on Foata normal form. 11/4501 useless extension candidates. Maximal degree in co-relation 25813. Up to 4029 conditions per place. [2024-06-14 13:15:37,674 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 196 selfloop transitions, 60 changer transitions 0/259 dead transitions. [2024-06-14 13:15:37,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 259 transitions, 2934 flow [2024-06-14 13:15:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-14 13:15:37,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2024-06-14 13:15:37,676 INFO L175 Difference]: Start difference. First operand has 257 places, 229 transitions, 2272 flow. Second operand 10 states and 144 transitions. [2024-06-14 13:15:37,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 259 transitions, 2934 flow [2024-06-14 13:15:38,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 259 transitions, 2800 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:38,171 INFO L231 Difference]: Finished difference. Result has 259 places, 230 transitions, 2304 flow [2024-06-14 13:15:38,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2304, PETRI_PLACES=259, PETRI_TRANSITIONS=230} [2024-06-14 13:15:38,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:15:38,172 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 230 transitions, 2304 flow [2024-06-14 13:15:38,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:38,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:38,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:38,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:15:38,173 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:38,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:38,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1937959697, now seen corresponding path program 9 times [2024-06-14 13:15:38,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:38,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674331468] [2024-06-14 13:15:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:38,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:42,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:42,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674331468] [2024-06-14 13:15:42,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674331468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:42,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:42,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:42,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415022307] [2024-06-14 13:15:42,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:42,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:42,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:42,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:42,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 230 transitions, 2304 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:42,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:42,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:42,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:43,430 INFO L124 PetriNetUnfolderBase]: 2953/4604 cut-off events. [2024-06-14 13:15:43,430 INFO L125 PetriNetUnfolderBase]: For 364727/364733 co-relation queries the response was YES. [2024-06-14 13:15:43,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27754 conditions, 4604 events. 2953/4604 cut-off events. For 364727/364733 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25524 event pairs, 808 based on Foata normal form. 11/4615 useless extension candidates. Maximal degree in co-relation 27631. Up to 3917 conditions per place. [2024-06-14 13:15:43,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 74 changer transitions 0/262 dead transitions. [2024-06-14 13:15:43,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 262 transitions, 3186 flow [2024-06-14 13:15:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-14 13:15:43,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-14 13:15:43,473 INFO L175 Difference]: Start difference. First operand has 259 places, 230 transitions, 2304 flow. Second operand 10 states and 145 transitions. [2024-06-14 13:15:43,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 262 transitions, 3186 flow [2024-06-14 13:15:44,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 262 transitions, 3034 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:44,032 INFO L231 Difference]: Finished difference. Result has 261 places, 232 transitions, 2394 flow [2024-06-14 13:15:44,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2394, PETRI_PLACES=261, PETRI_TRANSITIONS=232} [2024-06-14 13:15:44,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-14 13:15:44,033 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 232 transitions, 2394 flow [2024-06-14 13:15:44,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:44,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:44,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:44,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:15:44,033 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:44,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1884368055, now seen corresponding path program 7 times [2024-06-14 13:15:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:44,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854771975] [2024-06-14 13:15:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:44,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:47,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:47,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854771975] [2024-06-14 13:15:47,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854771975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:47,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:47,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:47,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549598924] [2024-06-14 13:15:47,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:47,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:47,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:47,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:47,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:47,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 232 transitions, 2394 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:47,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:47,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:47,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:49,501 INFO L124 PetriNetUnfolderBase]: 2981/4648 cut-off events. [2024-06-14 13:15:49,501 INFO L125 PetriNetUnfolderBase]: For 374797/374803 co-relation queries the response was YES. [2024-06-14 13:15:49,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28171 conditions, 4648 events. 2981/4648 cut-off events. For 374797/374803 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25872 event pairs, 824 based on Foata normal form. 11/4659 useless extension candidates. Maximal degree in co-relation 28047. Up to 4211 conditions per place. [2024-06-14 13:15:49,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 66 changer transitions 0/254 dead transitions. [2024-06-14 13:15:49,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 254 transitions, 3004 flow [2024-06-14 13:15:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-14 13:15:49,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335978835978836 [2024-06-14 13:15:49,536 INFO L175 Difference]: Start difference. First operand has 261 places, 232 transitions, 2394 flow. Second operand 9 states and 127 transitions. [2024-06-14 13:15:49,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 254 transitions, 3004 flow [2024-06-14 13:15:50,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 254 transitions, 2881 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:50,156 INFO L231 Difference]: Finished difference. Result has 264 places, 233 transitions, 2451 flow [2024-06-14 13:15:50,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2451, PETRI_PLACES=264, PETRI_TRANSITIONS=233} [2024-06-14 13:15:50,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-14 13:15:50,157 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 233 transitions, 2451 flow [2024-06-14 13:15:50,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:50,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:50,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:50,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:15:50,157 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:50,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:50,158 INFO L85 PathProgramCache]: Analyzing trace with hash -990376905, now seen corresponding path program 8 times [2024-06-14 13:15:50,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:50,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664250103] [2024-06-14 13:15:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:50,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:53,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664250103] [2024-06-14 13:15:53,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664250103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:53,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:53,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271517716] [2024-06-14 13:15:53,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:53,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:53,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:53,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 233 transitions, 2451 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:53,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:53,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:53,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:55,693 INFO L124 PetriNetUnfolderBase]: 2963/4622 cut-off events. [2024-06-14 13:15:55,693 INFO L125 PetriNetUnfolderBase]: For 349668/349674 co-relation queries the response was YES. [2024-06-14 13:15:55,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27259 conditions, 4622 events. 2963/4622 cut-off events. For 349668/349674 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25744 event pairs, 830 based on Foata normal form. 11/4633 useless extension candidates. Maximal degree in co-relation 27133. Up to 4161 conditions per place. [2024-06-14 13:15:55,735 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 58 changer transitions 0/264 dead transitions. [2024-06-14 13:15:55,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 264 transitions, 3089 flow [2024-06-14 13:15:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2024-06-14 13:15:55,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2024-06-14 13:15:55,736 INFO L175 Difference]: Start difference. First operand has 264 places, 233 transitions, 2451 flow. Second operand 11 states and 153 transitions. [2024-06-14 13:15:55,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 264 transitions, 3089 flow [2024-06-14 13:15:56,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 264 transitions, 2895 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:56,421 INFO L231 Difference]: Finished difference. Result has 268 places, 233 transitions, 2377 flow [2024-06-14 13:15:56,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2377, PETRI_PLACES=268, PETRI_TRANSITIONS=233} [2024-06-14 13:15:56,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 13:15:56,422 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 233 transitions, 2377 flow [2024-06-14 13:15:56,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:56,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:56,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:56,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:15:56,422 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:56,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash 674448475, now seen corresponding path program 10 times [2024-06-14 13:15:56,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:56,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121897808] [2024-06-14 13:15:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:56,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:59,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:59,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121897808] [2024-06-14 13:15:59,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121897808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:59,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:59,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:59,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335521730] [2024-06-14 13:15:59,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:59,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:59,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:59,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:15:59,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 233 transitions, 2377 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:59,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:59,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:15:59,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:01,577 INFO L124 PetriNetUnfolderBase]: 2945/4596 cut-off events. [2024-06-14 13:16:01,577 INFO L125 PetriNetUnfolderBase]: For 320211/320217 co-relation queries the response was YES. [2024-06-14 13:16:01,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25906 conditions, 4596 events. 2945/4596 cut-off events. For 320211/320217 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25577 event pairs, 808 based on Foata normal form. 11/4607 useless extension candidates. Maximal degree in co-relation 25779. Up to 4119 conditions per place. [2024-06-14 13:16:01,621 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 61 changer transitions 0/262 dead transitions. [2024-06-14 13:16:01,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 262 transitions, 3003 flow [2024-06-14 13:16:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:16:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:16:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-06-14 13:16:01,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404761904761905 [2024-06-14 13:16:01,622 INFO L175 Difference]: Start difference. First operand has 268 places, 233 transitions, 2377 flow. Second operand 10 states and 143 transitions. [2024-06-14 13:16:01,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 262 transitions, 3003 flow [2024-06-14 13:16:02,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 262 transitions, 2821 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-14 13:16:02,365 INFO L231 Difference]: Finished difference. Result has 267 places, 233 transitions, 2321 flow [2024-06-14 13:16:02,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2321, PETRI_PLACES=267, PETRI_TRANSITIONS=233} [2024-06-14 13:16:02,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 13:16:02,365 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 233 transitions, 2321 flow [2024-06-14 13:16:02,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:02,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:02,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:02,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:16:02,366 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:02,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash 682722685, now seen corresponding path program 11 times [2024-06-14 13:16:02,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:02,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307699904] [2024-06-14 13:16:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:02,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:05,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:05,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307699904] [2024-06-14 13:16:05,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307699904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:05,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:05,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:05,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566452192] [2024-06-14 13:16:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:05,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:05,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:05,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:16:05,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 233 transitions, 2321 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:05,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:05,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:16:05,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:07,568 INFO L124 PetriNetUnfolderBase]: 2973/4640 cut-off events. [2024-06-14 13:16:07,569 INFO L125 PetriNetUnfolderBase]: For 326052/326058 co-relation queries the response was YES. [2024-06-14 13:16:07,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26032 conditions, 4640 events. 2973/4640 cut-off events. For 326052/326058 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 25881 event pairs, 820 based on Foata normal form. 11/4651 useless extension candidates. Maximal degree in co-relation 25905. Up to 4205 conditions per place. [2024-06-14 13:16:07,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 64 changer transitions 0/255 dead transitions. [2024-06-14 13:16:07,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 255 transitions, 2937 flow [2024-06-14 13:16:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-14 13:16:07,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 13:16:07,608 INFO L175 Difference]: Start difference. First operand has 267 places, 233 transitions, 2321 flow. Second operand 9 states and 126 transitions. [2024-06-14 13:16:07,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 255 transitions, 2937 flow [2024-06-14 13:16:08,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 255 transitions, 2782 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:16:08,320 INFO L231 Difference]: Finished difference. Result has 267 places, 234 transitions, 2346 flow [2024-06-14 13:16:08,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2346, PETRI_PLACES=267, PETRI_TRANSITIONS=234} [2024-06-14 13:16:08,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 13:16:08,321 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 234 transitions, 2346 flow [2024-06-14 13:16:08,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:08,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:08,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:08,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:16:08,321 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:08,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:08,322 INFO L85 PathProgramCache]: Analyzing trace with hash 682722871, now seen corresponding path program 9 times [2024-06-14 13:16:08,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:08,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572138880] [2024-06-14 13:16:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:08,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:11,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572138880] [2024-06-14 13:16:11,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572138880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:11,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:11,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:11,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340628638] [2024-06-14 13:16:11,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:11,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:11,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:11,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:16:11,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 234 transitions, 2346 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:11,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:11,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:16:11,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:13,906 INFO L124 PetriNetUnfolderBase]: 3001/4684 cut-off events. [2024-06-14 13:16:13,906 INFO L125 PetriNetUnfolderBase]: For 334188/334194 co-relation queries the response was YES. [2024-06-14 13:16:13,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26363 conditions, 4684 events. 3001/4684 cut-off events. For 334188/334194 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26074 event pairs, 846 based on Foata normal form. 11/4695 useless extension candidates. Maximal degree in co-relation 26235. Up to 3997 conditions per place. [2024-06-14 13:16:13,951 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 67 changer transitions 0/263 dead transitions. [2024-06-14 13:16:13,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 263 transitions, 3006 flow [2024-06-14 13:16:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:16:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:16:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-14 13:16:13,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2024-06-14 13:16:13,953 INFO L175 Difference]: Start difference. First operand has 267 places, 234 transitions, 2346 flow. Second operand 10 states and 141 transitions. [2024-06-14 13:16:13,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 263 transitions, 3006 flow [2024-06-14 13:16:14,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 263 transitions, 2838 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:16:14,703 INFO L231 Difference]: Finished difference. Result has 270 places, 235 transitions, 2354 flow [2024-06-14 13:16:14,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2354, PETRI_PLACES=270, PETRI_TRANSITIONS=235} [2024-06-14 13:16:14,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-14 13:16:14,704 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 235 transitions, 2354 flow [2024-06-14 13:16:14,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:14,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:14,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:14,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:16:14,704 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:14,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash 682602715, now seen corresponding path program 12 times [2024-06-14 13:16:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:14,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110157275] [2024-06-14 13:16:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:18,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110157275] [2024-06-14 13:16:18,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110157275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:18,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:18,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:18,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331645485] [2024-06-14 13:16:18,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:18,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:18,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:18,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-14 13:16:18,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 235 transitions, 2354 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:18,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:18,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-14 13:16:18,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:19,915 INFO L124 PetriNetUnfolderBase]: 3029/4728 cut-off events. [2024-06-14 13:16:19,915 INFO L125 PetriNetUnfolderBase]: For 341853/341859 co-relation queries the response was YES. [2024-06-14 13:16:19,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26728 conditions, 4728 events. 3029/4728 cut-off events. For 341853/341859 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 26507 event pairs, 854 based on Foata normal form. 11/4739 useless extension candidates. Maximal degree in co-relation 26599. Up to 3293 conditions per place. [2024-06-14 13:16:19,961 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 108 changer transitions 0/268 dead transitions. [2024-06-14 13:16:19,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 268 transitions, 3052 flow [2024-06-14 13:16:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:16:19,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 13:16:19,962 INFO L175 Difference]: Start difference. First operand has 270 places, 235 transitions, 2354 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:16:19,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 268 transitions, 3052 flow [2024-06-14 13:16:20,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 268 transitions, 2888 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:20,704 INFO L231 Difference]: Finished difference. Result has 271 places, 236 transitions, 2460 flow [2024-06-14 13:16:20,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2460, PETRI_PLACES=271, PETRI_TRANSITIONS=236} [2024-06-14 13:16:20,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 13:16:20,705 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 236 transitions, 2460 flow [2024-06-14 13:16:20,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:20,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:20,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:20,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:16:20,705 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:20,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash -28655207, now seen corresponding path program 10 times [2024-06-14 13:16:20,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:20,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747851622] [2024-06-14 13:16:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:20,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15