./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix019.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix019.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix019.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix019.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:48:06,531 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:48:06,623 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:48:06,631 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:48:06,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:48:06,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:48:06,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:48:06,650 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:48:06,650 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:48:06,653 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:48:06,654 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:48:06,654 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:48:06,654 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:48:06,655 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:48:06,655 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:48:06,656 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:48:06,656 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:48:06,656 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:48:06,657 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:48:06,657 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:48:06,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:48:06,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:48:06,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:48:06,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:48:06,658 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:48:06,658 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:48:06,658 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:48:06,659 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:48:06,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:48:06,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:48:06,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:48:06,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:48:06,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:48:06,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:48:06,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:48:06,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:48:06,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:48:06,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:48:06,662 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:48:06,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:48:06,662 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:48:06,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:48:06,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:48:06,662 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:48:06,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:48:06,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:48:06,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:48:06,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:48:06,862 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:48:06,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix019.opt.i [2024-06-21 20:48:08,004 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:48:08,247 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:48:08,247 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019.opt.i [2024-06-21 20:48:08,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93acf1ce/6f57e7a372ad4430896735774105e017/FLAG375c79987 [2024-06-21 20:48:08,270 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93acf1ce/6f57e7a372ad4430896735774105e017 [2024-06-21 20:48:08,272 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:48:08,272 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:48:08,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix019.opt.yml/witness.yml [2024-06-21 20:48:08,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:48:08,386 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:48:08,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:48:08,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:48:08,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:48:08,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:48:08" (1/2) ... [2024-06-21 20:48:08,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bcaa7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:48:08, skipping insertion in model container [2024-06-21 20:48:08,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:48:08" (1/2) ... [2024-06-21 20:48:08,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7359ef94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:48:08, skipping insertion in model container [2024-06-21 20:48:08,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:48:08" (2/2) ... [2024-06-21 20:48:08,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bcaa7a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08, skipping insertion in model container [2024-06-21 20:48:08,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:48:08" (2/2) ... [2024-06-21 20:48:08,401 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:48:08,478 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:48:08,479 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 20:48:08,480 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 20:48:08,480 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 20:48:08,480 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:48:08,480 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-21 20:48:08,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:48:08,760 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:48:08,767 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:48:08,878 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:48:08,908 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:48:08,909 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08 WrapperNode [2024-06-21 20:48:08,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:48:08,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:48:08,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:48:08,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:48:08,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:08,941 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:08,980 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 148 [2024-06-21 20:48:08,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:48:08,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:48:08,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:48:08,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:48:08,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:08,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:08,999 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:09,012 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:48:09,013 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:09,019 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:09,029 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:09,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:09,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:09,045 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:09,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:48:09,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:48:09,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:48:09,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:48:09,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (1/1) ... [2024-06-21 20:48:09,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:48:09,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:48:09,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:48:09,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:48:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:48:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:48:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:48:09,131 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:48:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:48:09,132 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:48:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:48:09,132 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:48:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:48:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:48:09,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:48:09,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:48:09,134 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:48:09,230 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:48:09,231 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:48:09,570 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:48:09,572 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:48:09,717 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:48:09,717 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:48:09,718 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:48:09 BoogieIcfgContainer [2024-06-21 20:48:09,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:48:09,721 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:48:09,721 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:48:09,723 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:48:09,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:48:08" (1/4) ... [2024-06-21 20:48:09,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f960350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:48:09, skipping insertion in model container [2024-06-21 20:48:09,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:48:08" (2/4) ... [2024-06-21 20:48:09,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f960350 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:48:09, skipping insertion in model container [2024-06-21 20:48:09,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:48:08" (3/4) ... [2024-06-21 20:48:09,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f960350 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:48:09, skipping insertion in model container [2024-06-21 20:48:09,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:48:09" (4/4) ... [2024-06-21 20:48:09,726 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019.opt.i [2024-06-21 20:48:09,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:48:09,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:48:09,740 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:48:09,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:48:09,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:48:09,846 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 20:48:09,846 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:48:09,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:48:09,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:48:09,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 20:48:09,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:48:09,869 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;@7b9965d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:48:09,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:48:09,873 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:48:09,873 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:48:09,873 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:48:09,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:09,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:48:09,874 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)] === [2024-06-21 20:48:09,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:09,878 INFO L85 PathProgramCache]: Analyzing trace with hash 394630545, now seen corresponding path program 1 times [2024-06-21 20:48:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:09,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623806258] [2024-06-21 20:48:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:10,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623806258] [2024-06-21 20:48:10,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623806258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:10,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:10,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:48:10,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713363075] [2024-06-21 20:48:10,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:10,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:48:10,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:48:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:48:10,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-21 20:48:10,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:10,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:10,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-21 20:48:10,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:11,207 INFO L124 PetriNetUnfolderBase]: 1116/1756 cut-off events. [2024-06-21 20:48:11,207 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 20:48:11,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3507 conditions, 1756 events. 1116/1756 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8656 event pairs, 765 based on Foata normal form. 1/1686 useless extension candidates. Maximal degree in co-relation 3495. Up to 1676 conditions per place. [2024-06-21 20:48:11,220 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 20:48:11,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-21 20:48:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:48:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:48:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-21 20:48:11,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:48:11,231 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 77 transitions. [2024-06-21 20:48:11,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-21 20:48:11,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:11,236 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 20:48:11,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 20:48:11,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 20:48:11,241 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 20:48:11,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:11,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:11,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:11,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:48:11,241 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)] === [2024-06-21 20:48:11,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:11,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1282871984, now seen corresponding path program 1 times [2024-06-21 20:48:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:11,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007751765] [2024-06-21 20:48:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:11,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007751765] [2024-06-21 20:48:11,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007751765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:11,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:11,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:48:11,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031723805] [2024-06-21 20:48:11,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:11,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:48:11,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:48:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:48:11,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 20:48:11,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:11,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:11,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 20:48:11,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:12,098 INFO L124 PetriNetUnfolderBase]: 1280/1957 cut-off events. [2024-06-21 20:48:12,099 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-21 20:48:12,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 1957 events. 1280/1957 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9402 event pairs, 750 based on Foata normal form. 3/1952 useless extension candidates. Maximal degree in co-relation 4466. Up to 1897 conditions per place. [2024-06-21 20:48:12,107 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 20:48:12,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-21 20:48:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:48:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:48:12,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-21 20:48:12,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:48:12,109 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 97 transitions. [2024-06-21 20:48:12,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-21 20:48:12,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:48:12,111 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 20:48:12,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 20:48:12,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 20:48:12,112 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 20:48:12,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:12,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:12,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:12,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:48:12,113 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)] === [2024-06-21 20:48:12,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1114327160, now seen corresponding path program 1 times [2024-06-21 20:48:12,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:12,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670167571] [2024-06-21 20:48:12,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:12,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:12,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:12,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670167571] [2024-06-21 20:48:12,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670167571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:12,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:12,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:48:12,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3655159] [2024-06-21 20:48:12,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:12,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:48:12,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:12,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:48:12,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:48:12,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 20:48:12,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:12,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:12,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 20:48:12,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:13,077 INFO L124 PetriNetUnfolderBase]: 1302/2008 cut-off events. [2024-06-21 20:48:13,078 INFO L125 PetriNetUnfolderBase]: For 1139/1139 co-relation queries the response was YES. [2024-06-21 20:48:13,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5095 conditions, 2008 events. 1302/2008 cut-off events. For 1139/1139 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9817 event pairs, 470 based on Foata normal form. 7/2008 useless extension candidates. Maximal degree in co-relation 5081. Up to 1800 conditions per place. [2024-06-21 20:48:13,086 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 20:48:13,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 77 transitions, 404 flow [2024-06-21 20:48:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:48:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:48:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 20:48:13,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:48:13,089 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 130 transitions. [2024-06-21 20:48:13,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 77 transitions, 404 flow [2024-06-21 20:48:13,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:48:13,092 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-21 20:48:13,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-21 20:48:13,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 20:48:13,093 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-21 20:48:13,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:13,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:13,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:13,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:48:13,093 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:13,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1420992673, now seen corresponding path program 1 times [2024-06-21 20:48:13,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:13,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975999043] [2024-06-21 20:48:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:13,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:13,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:13,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975999043] [2024-06-21 20:48:13,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975999043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:13,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:13,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:48:13,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987183517] [2024-06-21 20:48:13,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:13,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:48:13,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:13,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:48:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:48:13,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 20:48:13,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-21 20:48:13,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:13,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 20:48:13,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:14,172 INFO L124 PetriNetUnfolderBase]: 1384/2154 cut-off events. [2024-06-21 20:48:14,172 INFO L125 PetriNetUnfolderBase]: For 2930/2930 co-relation queries the response was YES. [2024-06-21 20:48:14,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6513 conditions, 2154 events. 1384/2154 cut-off events. For 2930/2930 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10833 event pairs, 321 based on Foata normal form. 26/2173 useless extension candidates. Maximal degree in co-relation 6496. Up to 1764 conditions per place. [2024-06-21 20:48:14,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 63 selfloop transitions, 18 changer transitions 0/87 dead transitions. [2024-06-21 20:48:14,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 521 flow [2024-06-21 20:48:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:48:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:48:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:48:14,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:48:14,186 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:48:14,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 521 flow [2024-06-21 20:48:14,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 513 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 20:48:14,189 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 283 flow [2024-06-21 20:48:14,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-21 20:48:14,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-21 20:48:14,190 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 283 flow [2024-06-21 20:48:14,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-21 20:48:14,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:14,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:14,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:48:14,191 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)] === [2024-06-21 20:48:14,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 637640795, now seen corresponding path program 1 times [2024-06-21 20:48:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:14,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169530427] [2024-06-21 20:48:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:14,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169530427] [2024-06-21 20:48:14,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169530427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:14,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:14,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:48:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850428063] [2024-06-21 20:48:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:14,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:48:14,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:14,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:48:14,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:48:14,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:14,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2024-06-21 20:48:14,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:14,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:14,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:15,104 INFO L124 PetriNetUnfolderBase]: 1204/1959 cut-off events. [2024-06-21 20:48:15,105 INFO L125 PetriNetUnfolderBase]: For 3655/3655 co-relation queries the response was YES. [2024-06-21 20:48:15,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6292 conditions, 1959 events. 1204/1959 cut-off events. For 3655/3655 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10207 event pairs, 447 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 6271. Up to 1814 conditions per place. [2024-06-21 20:48:15,116 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 48 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-21 20:48:15,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 425 flow [2024-06-21 20:48:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:48:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:48:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-21 20:48:15,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 20:48:15,117 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 283 flow. Second operand 5 states and 100 transitions. [2024-06-21 20:48:15,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 425 flow [2024-06-21 20:48:15,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 381 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:15,121 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 263 flow [2024-06-21 20:48:15,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-21 20:48:15,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 20:48:15,122 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 263 flow [2024-06-21 20:48:15,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2024-06-21 20:48:15,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:15,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:15,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:48:15,123 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)] === [2024-06-21 20:48:15,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1671494376, now seen corresponding path program 1 times [2024-06-21 20:48:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:15,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615136354] [2024-06-21 20:48:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:15,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:15,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:15,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615136354] [2024-06-21 20:48:15,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615136354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:15,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:15,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:48:15,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096496549] [2024-06-21 20:48:15,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:15,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:48:15,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:15,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:48:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:48:15,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:15,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 263 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-21 20:48:15,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:15,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:15,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:16,161 INFO L124 PetriNetUnfolderBase]: 1386/2158 cut-off events. [2024-06-21 20:48:16,162 INFO L125 PetriNetUnfolderBase]: For 4805/4805 co-relation queries the response was YES. [2024-06-21 20:48:16,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 2158 events. 1386/2158 cut-off events. For 4805/4805 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10782 event pairs, 459 based on Foata normal form. 8/2160 useless extension candidates. Maximal degree in co-relation 6990. Up to 1943 conditions per place. [2024-06-21 20:48:16,172 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-06-21 20:48:16,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 503 flow [2024-06-21 20:48:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:48:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:48:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 20:48:16,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-21 20:48:16,173 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 263 flow. Second operand 6 states and 124 transitions. [2024-06-21 20:48:16,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 503 flow [2024-06-21 20:48:16,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 481 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:16,177 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 313 flow [2024-06-21 20:48:16,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-21 20:48:16,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 20:48:16,178 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 313 flow [2024-06-21 20:48:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-21 20:48:16,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:16,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:16,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:48:16,178 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)] === [2024-06-21 20:48:16,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1407492486, now seen corresponding path program 2 times [2024-06-21 20:48:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:16,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137211739] [2024-06-21 20:48:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:16,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:16,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:16,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137211739] [2024-06-21 20:48:16,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137211739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:16,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:16,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:48:16,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895536369] [2024-06-21 20:48:16,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:16,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:48:16,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:48:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:48:16,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:16,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-21 20:48:16,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:16,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:16,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:17,192 INFO L124 PetriNetUnfolderBase]: 1354/2087 cut-off events. [2024-06-21 20:48:17,193 INFO L125 PetriNetUnfolderBase]: For 5877/5883 co-relation queries the response was YES. [2024-06-21 20:48:17,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7088 conditions, 2087 events. 1354/2087 cut-off events. For 5877/5883 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10225 event pairs, 469 based on Foata normal form. 5/2081 useless extension candidates. Maximal degree in co-relation 7065. Up to 1895 conditions per place. [2024-06-21 20:48:17,204 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 46 selfloop transitions, 20 changer transitions 0/71 dead transitions. [2024-06-21 20:48:17,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 489 flow [2024-06-21 20:48:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:48:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:48:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 20:48:17,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 20:48:17,210 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 313 flow. Second operand 6 states and 120 transitions. [2024-06-21 20:48:17,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 489 flow [2024-06-21 20:48:17,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 460 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:17,229 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 332 flow [2024-06-21 20:48:17,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-06-21 20:48:17,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 20:48:17,230 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 332 flow [2024-06-21 20:48:17,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-21 20:48:17,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:17,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:17,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:48:17,231 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)] === [2024-06-21 20:48:17,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash -99339420, now seen corresponding path program 1 times [2024-06-21 20:48:17,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:17,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75643762] [2024-06-21 20:48:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:17,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:18,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:18,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75643762] [2024-06-21 20:48:18,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75643762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:18,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:18,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:18,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672012247] [2024-06-21 20:48:18,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:18,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:18,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:18,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:18,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:18,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:18,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:18,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:18,664 INFO L124 PetriNetUnfolderBase]: 1176/1895 cut-off events. [2024-06-21 20:48:18,664 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2024-06-21 20:48:18,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6483 conditions, 1895 events. 1176/1895 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9591 event pairs, 406 based on Foata normal form. 4/1883 useless extension candidates. Maximal degree in co-relation 6459. Up to 1742 conditions per place. [2024-06-21 20:48:18,678 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-21 20:48:18,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 563 flow [2024-06-21 20:48:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:48:18,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 20:48:18,680 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 332 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:48:18,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 563 flow [2024-06-21 20:48:18,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 493 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:18,687 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 342 flow [2024-06-21 20:48:18,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-21 20:48:18,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-21 20:48:18,690 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 342 flow [2024-06-21 20:48:18,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:18,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:18,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:18,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:48:18,691 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:18,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash -657113355, now seen corresponding path program 1 times [2024-06-21 20:48:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581761947] [2024-06-21 20:48:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:19,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:19,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581761947] [2024-06-21 20:48:19,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581761947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:19,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:19,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:48:19,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706974830] [2024-06-21 20:48:19,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:19,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:48:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:48:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:48:19,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:19,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:19,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:19,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:19,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:19,578 INFO L124 PetriNetUnfolderBase]: 1173/1906 cut-off events. [2024-06-21 20:48:19,579 INFO L125 PetriNetUnfolderBase]: For 6996/6996 co-relation queries the response was YES. [2024-06-21 20:48:19,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6746 conditions, 1906 events. 1173/1906 cut-off events. For 6996/6996 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9747 event pairs, 420 based on Foata normal form. 1/1904 useless extension candidates. Maximal degree in co-relation 6720. Up to 1771 conditions per place. [2024-06-21 20:48:19,590 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 55 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-06-21 20:48:19,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 508 flow [2024-06-21 20:48:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:48:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:48:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-21 20:48:19,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:48:19,591 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 342 flow. Second operand 5 states and 95 transitions. [2024-06-21 20:48:19,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 508 flow [2024-06-21 20:48:19,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 69 transitions, 475 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:19,597 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 357 flow [2024-06-21 20:48:19,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-21 20:48:19,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-21 20:48:19,598 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 357 flow [2024-06-21 20:48:19,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:19,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:19,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:19,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:48:19,598 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:19,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1104324287, now seen corresponding path program 1 times [2024-06-21 20:48:19,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:19,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516904177] [2024-06-21 20:48:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516904177] [2024-06-21 20:48:20,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516904177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:20,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:20,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:48:20,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275408363] [2024-06-21 20:48:20,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:20,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:48:20,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:48:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:48:20,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:20,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 357 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:20,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:20,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:20,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:20,873 INFO L124 PetriNetUnfolderBase]: 1170/1902 cut-off events. [2024-06-21 20:48:20,873 INFO L125 PetriNetUnfolderBase]: For 8266/8266 co-relation queries the response was YES. [2024-06-21 20:48:20,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7021 conditions, 1902 events. 1170/1902 cut-off events. For 8266/8266 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9714 event pairs, 419 based on Foata normal form. 1/1900 useless extension candidates. Maximal degree in co-relation 6994. Up to 1764 conditions per place. [2024-06-21 20:48:20,884 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 56 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-21 20:48:20,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 537 flow [2024-06-21 20:48:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:48:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:48:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 20:48:20,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 20:48:20,885 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 357 flow. Second operand 6 states and 110 transitions. [2024-06-21 20:48:20,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 537 flow [2024-06-21 20:48:20,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 511 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:20,891 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 389 flow [2024-06-21 20:48:20,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-21 20:48:20,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 20:48:20,892 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 389 flow [2024-06-21 20:48:20,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:20,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:20,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:20,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:48:20,892 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)] === [2024-06-21 20:48:20,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:20,893 INFO L85 PathProgramCache]: Analyzing trace with hash 244621001, now seen corresponding path program 1 times [2024-06-21 20:48:20,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:20,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881063179] [2024-06-21 20:48:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:20,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:21,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:21,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881063179] [2024-06-21 20:48:21,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881063179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:21,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:21,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:21,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283433265] [2024-06-21 20:48:21,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:21,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:21,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:21,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:21,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 389 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:21,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:21,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:21,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:22,215 INFO L124 PetriNetUnfolderBase]: 1481/2321 cut-off events. [2024-06-21 20:48:22,215 INFO L125 PetriNetUnfolderBase]: For 13703/13706 co-relation queries the response was YES. [2024-06-21 20:48:22,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9178 conditions, 2321 events. 1481/2321 cut-off events. For 13703/13706 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11727 event pairs, 329 based on Foata normal form. 16/2332 useless extension candidates. Maximal degree in co-relation 9150. Up to 1660 conditions per place. [2024-06-21 20:48:22,229 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 74 selfloop transitions, 22 changer transitions 0/101 dead transitions. [2024-06-21 20:48:22,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 739 flow [2024-06-21 20:48:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 20:48:22,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-21 20:48:22,231 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 389 flow. Second operand 7 states and 146 transitions. [2024-06-21 20:48:22,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 739 flow [2024-06-21 20:48:22,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 703 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:22,239 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 429 flow [2024-06-21 20:48:22,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-06-21 20:48:22,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-21 20:48:22,240 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 429 flow [2024-06-21 20:48:22,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:22,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:22,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:22,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:48:22,241 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)] === [2024-06-21 20:48:22,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash 247477961, now seen corresponding path program 2 times [2024-06-21 20:48:22,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:22,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723771610] [2024-06-21 20:48:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:22,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:22,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723771610] [2024-06-21 20:48:22,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723771610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:22,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:22,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016032293] [2024-06-21 20:48:22,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:22,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:22,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:22,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:22,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:22,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:22,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:23,478 INFO L124 PetriNetUnfolderBase]: 1523/2395 cut-off events. [2024-06-21 20:48:23,478 INFO L125 PetriNetUnfolderBase]: For 16160/16163 co-relation queries the response was YES. [2024-06-21 20:48:23,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9702 conditions, 2395 events. 1523/2395 cut-off events. For 16160/16163 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12226 event pairs, 484 based on Foata normal form. 24/2414 useless extension candidates. Maximal degree in co-relation 9673. Up to 2047 conditions per place. [2024-06-21 20:48:23,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-06-21 20:48:23,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 713 flow [2024-06-21 20:48:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:48:23,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-21 20:48:23,493 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 429 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:48:23,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 713 flow [2024-06-21 20:48:23,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 97 transitions, 683 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:23,506 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 477 flow [2024-06-21 20:48:23,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-06-21 20:48:23,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 20:48:23,507 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 477 flow [2024-06-21 20:48:23,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:23,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:23,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:23,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:48:23,510 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:23,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:23,510 INFO L85 PathProgramCache]: Analyzing trace with hash -137125356, now seen corresponding path program 1 times [2024-06-21 20:48:23,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:23,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681362800] [2024-06-21 20:48:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:23,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:24,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:24,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681362800] [2024-06-21 20:48:24,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681362800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:24,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:24,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741548546] [2024-06-21 20:48:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:24,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:24,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:24,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:24,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:24,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 477 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:24,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:24,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:24,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:24,659 INFO L124 PetriNetUnfolderBase]: 1528/2412 cut-off events. [2024-06-21 20:48:24,659 INFO L125 PetriNetUnfolderBase]: For 17331/17331 co-relation queries the response was YES. [2024-06-21 20:48:24,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10172 conditions, 2412 events. 1528/2412 cut-off events. For 17331/17331 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12356 event pairs, 545 based on Foata normal form. 1/2410 useless extension candidates. Maximal degree in co-relation 10141. Up to 2314 conditions per place. [2024-06-21 20:48:24,671 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 70 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-06-21 20:48:24,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 703 flow [2024-06-21 20:48:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:48:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:48:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 20:48:24,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:48:24,672 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 477 flow. Second operand 6 states and 111 transitions. [2024-06-21 20:48:24,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 703 flow [2024-06-21 20:48:24,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 649 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:24,684 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 483 flow [2024-06-21 20:48:24,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=483, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-06-21 20:48:24,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-21 20:48:24,685 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 483 flow [2024-06-21 20:48:24,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:24,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:24,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:24,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:48:24,686 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)] === [2024-06-21 20:48:24,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash -213698785, now seen corresponding path program 1 times [2024-06-21 20:48:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:24,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986491764] [2024-06-21 20:48:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:24,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:25,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:25,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986491764] [2024-06-21 20:48:25,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986491764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:25,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:25,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:25,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597048155] [2024-06-21 20:48:25,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:25,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:25,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:25,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:25,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 483 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:25,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:25,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:25,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:26,151 INFO L124 PetriNetUnfolderBase]: 1556/2448 cut-off events. [2024-06-21 20:48:26,151 INFO L125 PetriNetUnfolderBase]: For 19936/19942 co-relation queries the response was YES. [2024-06-21 20:48:26,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10598 conditions, 2448 events. 1556/2448 cut-off events. For 19936/19942 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12574 event pairs, 506 based on Foata normal form. 5/2442 useless extension candidates. Maximal degree in co-relation 10566. Up to 2208 conditions per place. [2024-06-21 20:48:26,165 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 70 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2024-06-21 20:48:26,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 103 transitions, 798 flow [2024-06-21 20:48:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:48:26,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 20:48:26,167 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 483 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:48:26,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 103 transitions, 798 flow [2024-06-21 20:48:26,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 760 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:26,178 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 571 flow [2024-06-21 20:48:26,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=571, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2024-06-21 20:48:26,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-21 20:48:26,179 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 571 flow [2024-06-21 20:48:26,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:26,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:26,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:26,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:48:26,180 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:26,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash -976171931, now seen corresponding path program 2 times [2024-06-21 20:48:26,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:26,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080319423] [2024-06-21 20:48:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:26,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:27,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:27,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080319423] [2024-06-21 20:48:27,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080319423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:27,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:27,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:27,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662946356] [2024-06-21 20:48:27,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:27,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:27,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:27,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:27,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:27,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:27,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:27,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:27,856 INFO L124 PetriNetUnfolderBase]: 1548/2439 cut-off events. [2024-06-21 20:48:27,856 INFO L125 PetriNetUnfolderBase]: For 23012/23018 co-relation queries the response was YES. [2024-06-21 20:48:27,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11088 conditions, 2439 events. 1548/2439 cut-off events. For 23012/23018 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12486 event pairs, 504 based on Foata normal form. 5/2435 useless extension candidates. Maximal degree in co-relation 11054. Up to 2196 conditions per place. [2024-06-21 20:48:27,897 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 71 selfloop transitions, 34 changer transitions 0/110 dead transitions. [2024-06-21 20:48:27,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 110 transitions, 932 flow [2024-06-21 20:48:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:48:27,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 20:48:27,898 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 571 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:48:27,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 110 transitions, 932 flow [2024-06-21 20:48:27,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 849 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:27,924 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 666 flow [2024-06-21 20:48:27,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=666, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-21 20:48:27,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-21 20:48:27,926 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 666 flow [2024-06-21 20:48:27,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:27,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:27,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:27,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:48:27,927 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)] === [2024-06-21 20:48:27,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash -975875261, now seen corresponding path program 3 times [2024-06-21 20:48:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:27,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156102650] [2024-06-21 20:48:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:27,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:28,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:28,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156102650] [2024-06-21 20:48:28,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156102650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:28,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:28,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:28,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45598393] [2024-06-21 20:48:28,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:28,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:28,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:28,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:28,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:28,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:28,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 666 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:28,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:28,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:28,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:29,491 INFO L124 PetriNetUnfolderBase]: 1581/2508 cut-off events. [2024-06-21 20:48:29,492 INFO L125 PetriNetUnfolderBase]: For 25896/25902 co-relation queries the response was YES. [2024-06-21 20:48:29,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11616 conditions, 2508 events. 1581/2508 cut-off events. For 25896/25902 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13026 event pairs, 412 based on Foata normal form. 5/2504 useless extension candidates. Maximal degree in co-relation 11580. Up to 2086 conditions per place. [2024-06-21 20:48:29,506 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 71 selfloop transitions, 41 changer transitions 0/117 dead transitions. [2024-06-21 20:48:29,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 1006 flow [2024-06-21 20:48:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:48:29,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-21 20:48:29,525 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 666 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:48:29,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 1006 flow [2024-06-21 20:48:29,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 942 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:29,544 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 748 flow [2024-06-21 20:48:29,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=748, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2024-06-21 20:48:29,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 20:48:29,545 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 748 flow [2024-06-21 20:48:29,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:29,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:29,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:29,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:48:29,546 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:29,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:29,546 INFO L85 PathProgramCache]: Analyzing trace with hash -125697516, now seen corresponding path program 2 times [2024-06-21 20:48:29,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:29,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659321380] [2024-06-21 20:48:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:29,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:30,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:30,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659321380] [2024-06-21 20:48:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659321380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:30,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:48:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584458304] [2024-06-21 20:48:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:30,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:48:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:48:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:48:30,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:30,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 748 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:30,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:30,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:30,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:30,621 INFO L124 PetriNetUnfolderBase]: 1578/2520 cut-off events. [2024-06-21 20:48:30,621 INFO L125 PetriNetUnfolderBase]: For 28416/28425 co-relation queries the response was YES. [2024-06-21 20:48:30,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11884 conditions, 2520 events. 1578/2520 cut-off events. For 28416/28425 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13190 event pairs, 508 based on Foata normal form. 7/2522 useless extension candidates. Maximal degree in co-relation 11846. Up to 2394 conditions per place. [2024-06-21 20:48:30,634 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 79 selfloop transitions, 16 changer transitions 0/100 dead transitions. [2024-06-21 20:48:30,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 998 flow [2024-06-21 20:48:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:48:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:48:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 20:48:30,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-21 20:48:30,635 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 748 flow. Second operand 6 states and 107 transitions. [2024-06-21 20:48:30,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 998 flow [2024-06-21 20:48:30,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 100 transitions, 908 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:30,651 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 740 flow [2024-06-21 20:48:30,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=740, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-06-21 20:48:30,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-21 20:48:30,651 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 740 flow [2024-06-21 20:48:30,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:30,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:30,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:30,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:48:30,652 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:30,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash -131405484, now seen corresponding path program 1 times [2024-06-21 20:48:30,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:30,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649526390] [2024-06-21 20:48:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:31,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:31,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649526390] [2024-06-21 20:48:31,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649526390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:31,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:31,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:31,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67046781] [2024-06-21 20:48:31,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:31,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:31,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:31,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:31,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:31,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:31,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 740 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:31,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:31,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:31,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:31,705 INFO L124 PetriNetUnfolderBase]: 1421/2343 cut-off events. [2024-06-21 20:48:31,705 INFO L125 PetriNetUnfolderBase]: For 26887/26887 co-relation queries the response was YES. [2024-06-21 20:48:31,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 2343 events. 1421/2343 cut-off events. For 26887/26887 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12617 event pairs, 434 based on Foata normal form. 2/2342 useless extension candidates. Maximal degree in co-relation 10894. Up to 2176 conditions per place. [2024-06-21 20:48:31,717 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-06-21 20:48:31,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 107 transitions, 1002 flow [2024-06-21 20:48:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:48:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:48:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 20:48:31,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:48:31,719 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 740 flow. Second operand 6 states and 114 transitions. [2024-06-21 20:48:31,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 107 transitions, 1002 flow [2024-06-21 20:48:31,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 942 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:31,737 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 738 flow [2024-06-21 20:48:31,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-06-21 20:48:31,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-21 20:48:31,738 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 738 flow [2024-06-21 20:48:31,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:31,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:31,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:31,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:48:31,738 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:31,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:31,739 INFO L85 PathProgramCache]: Analyzing trace with hash -125691564, now seen corresponding path program 2 times [2024-06-21 20:48:31,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:31,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609783112] [2024-06-21 20:48:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:31,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:32,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609783112] [2024-06-21 20:48:32,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609783112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:32,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:32,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137254350] [2024-06-21 20:48:32,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:32,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:32,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:32,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:32,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:32,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:32,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 738 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:32,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:32,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:32,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:32,919 INFO L124 PetriNetUnfolderBase]: 1423/2349 cut-off events. [2024-06-21 20:48:32,920 INFO L125 PetriNetUnfolderBase]: For 28913/28916 co-relation queries the response was YES. [2024-06-21 20:48:32,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11301 conditions, 2349 events. 1423/2349 cut-off events. For 28913/28916 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12689 event pairs, 438 based on Foata normal form. 4/2349 useless extension candidates. Maximal degree in co-relation 11261. Up to 2170 conditions per place. [2024-06-21 20:48:32,934 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-06-21 20:48:32,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 1018 flow [2024-06-21 20:48:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:48:32,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:48:32,936 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 738 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:48:32,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 1018 flow [2024-06-21 20:48:32,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 980 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:32,976 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 795 flow [2024-06-21 20:48:32,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-21 20:48:32,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-21 20:48:32,977 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 795 flow [2024-06-21 20:48:32,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:32,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:32,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:32,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:48:32,977 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:32,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash 132857868, now seen corresponding path program 1 times [2024-06-21 20:48:32,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:32,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796871800] [2024-06-21 20:48:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:32,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:33,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:33,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796871800] [2024-06-21 20:48:33,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796871800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:33,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:33,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:33,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499965637] [2024-06-21 20:48:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:33,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:33,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:33,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 795 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:33,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:33,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:33,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:34,165 INFO L124 PetriNetUnfolderBase]: 1605/2565 cut-off events. [2024-06-21 20:48:34,166 INFO L125 PetriNetUnfolderBase]: For 38380/38383 co-relation queries the response was YES. [2024-06-21 20:48:34,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13070 conditions, 2565 events. 1605/2565 cut-off events. For 38380/38383 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13550 event pairs, 498 based on Foata normal form. 5/2566 useless extension candidates. Maximal degree in co-relation 13028. Up to 2367 conditions per place. [2024-06-21 20:48:34,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 98 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-21 20:48:34,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 128 transitions, 1167 flow [2024-06-21 20:48:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:48:34,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-21 20:48:34,180 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 795 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:48:34,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 128 transitions, 1167 flow [2024-06-21 20:48:34,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 128 transitions, 1120 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:34,202 INFO L231 Difference]: Finished difference. Result has 102 places, 106 transitions, 888 flow [2024-06-21 20:48:34,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=888, PETRI_PLACES=102, PETRI_TRANSITIONS=106} [2024-06-21 20:48:34,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 20:48:34,203 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 106 transitions, 888 flow [2024-06-21 20:48:34,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:34,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:34,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:34,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:48:34,203 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)] === [2024-06-21 20:48:34,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1633332289, now seen corresponding path program 1 times [2024-06-21 20:48:34,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:34,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121586770] [2024-06-21 20:48:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:34,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:35,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:35,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121586770] [2024-06-21 20:48:35,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121586770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:35,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:35,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:35,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549055562] [2024-06-21 20:48:35,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:35,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:35,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:35,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:35,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:35,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 106 transitions, 888 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:35,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:35,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:35,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:35,848 INFO L124 PetriNetUnfolderBase]: 1715/2764 cut-off events. [2024-06-21 20:48:35,848 INFO L125 PetriNetUnfolderBase]: For 44644/44647 co-relation queries the response was YES. [2024-06-21 20:48:35,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14539 conditions, 2764 events. 1715/2764 cut-off events. For 44644/44647 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15063 event pairs, 508 based on Foata normal form. 12/2771 useless extension candidates. Maximal degree in co-relation 14494. Up to 2189 conditions per place. [2024-06-21 20:48:35,861 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 100 selfloop transitions, 38 changer transitions 0/143 dead transitions. [2024-06-21 20:48:35,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1314 flow [2024-06-21 20:48:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:48:35,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-21 20:48:35,863 INFO L175 Difference]: Start difference. First operand has 102 places, 106 transitions, 888 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:48:35,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1314 flow [2024-06-21 20:48:35,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1245 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:35,887 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 970 flow [2024-06-21 20:48:35,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=970, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2024-06-21 20:48:35,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 20:48:35,887 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 970 flow [2024-06-21 20:48:35,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:35,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:35,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:35,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:48:35,888 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:35,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash 386381662, now seen corresponding path program 1 times [2024-06-21 20:48:35,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:35,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475376643] [2024-06-21 20:48:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:36,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475376643] [2024-06-21 20:48:36,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475376643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:36,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:36,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:36,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215178381] [2024-06-21 20:48:36,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:36,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:36,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:36,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:36,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 970 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:36,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:36,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:36,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:37,206 INFO L124 PetriNetUnfolderBase]: 1720/2771 cut-off events. [2024-06-21 20:48:37,206 INFO L125 PetriNetUnfolderBase]: For 47177/47177 co-relation queries the response was YES. [2024-06-21 20:48:37,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14918 conditions, 2771 events. 1720/2771 cut-off events. For 47177/47177 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15093 event pairs, 518 based on Foata normal form. 1/2769 useless extension candidates. Maximal degree in co-relation 14872. Up to 2627 conditions per place. [2024-06-21 20:48:37,223 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 15 changer transitions 0/129 dead transitions. [2024-06-21 20:48:37,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 129 transitions, 1298 flow [2024-06-21 20:48:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 20:48:37,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 20:48:37,232 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 970 flow. Second operand 7 states and 125 transitions. [2024-06-21 20:48:37,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 129 transitions, 1298 flow [2024-06-21 20:48:37,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 129 transitions, 1246 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:37,262 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1000 flow [2024-06-21 20:48:37,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1000, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2024-06-21 20:48:37,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-21 20:48:37,263 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1000 flow [2024-06-21 20:48:37,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:37,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:37,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:37,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:48:37,264 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:37,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash 132868098, now seen corresponding path program 2 times [2024-06-21 20:48:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:37,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134322110] [2024-06-21 20:48:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:37,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134322110] [2024-06-21 20:48:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134322110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:37,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:37,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:37,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348184740] [2024-06-21 20:48:37,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:37,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:38,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:38,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1000 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:38,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:38,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:38,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:38,517 INFO L124 PetriNetUnfolderBase]: 1771/2857 cut-off events. [2024-06-21 20:48:38,517 INFO L125 PetriNetUnfolderBase]: For 51077/51080 co-relation queries the response was YES. [2024-06-21 20:48:38,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15682 conditions, 2857 events. 1771/2857 cut-off events. For 51077/51080 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15696 event pairs, 523 based on Foata normal form. 5/2858 useless extension candidates. Maximal degree in co-relation 15635. Up to 2587 conditions per place. [2024-06-21 20:48:38,537 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 105 selfloop transitions, 30 changer transitions 0/140 dead transitions. [2024-06-21 20:48:38,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 140 transitions, 1474 flow [2024-06-21 20:48:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 20:48:38,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-21 20:48:38,538 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1000 flow. Second operand 7 states and 134 transitions. [2024-06-21 20:48:38,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 140 transitions, 1474 flow [2024-06-21 20:48:38,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1414 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:38,573 INFO L231 Difference]: Finished difference. Result has 114 places, 122 transitions, 1134 flow [2024-06-21 20:48:38,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2024-06-21 20:48:38,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 20:48:38,574 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 1134 flow [2024-06-21 20:48:38,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:38,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:38,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:48:38,574 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)] === [2024-06-21 20:48:38,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash 17598723, now seen corresponding path program 2 times [2024-06-21 20:48:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:38,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55130617] [2024-06-21 20:48:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:38,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:39,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:39,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55130617] [2024-06-21 20:48:39,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55130617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:39,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:39,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:39,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56954620] [2024-06-21 20:48:39,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:39,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:39,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:39,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:39,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 1134 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:39,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:39,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:39,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:40,153 INFO L124 PetriNetUnfolderBase]: 1751/2824 cut-off events. [2024-06-21 20:48:40,154 INFO L125 PetriNetUnfolderBase]: For 57015/57018 co-relation queries the response was YES. [2024-06-21 20:48:40,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16151 conditions, 2824 events. 1751/2824 cut-off events. For 57015/57018 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15413 event pairs, 318 based on Foata normal form. 12/2831 useless extension candidates. Maximal degree in co-relation 16102. Up to 1819 conditions per place. [2024-06-21 20:48:40,172 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-06-21 20:48:40,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 151 transitions, 1526 flow [2024-06-21 20:48:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:48:40,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-21 20:48:40,173 INFO L175 Difference]: Start difference. First operand has 114 places, 122 transitions, 1134 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:48:40,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 151 transitions, 1526 flow [2024-06-21 20:48:40,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 151 transitions, 1449 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:40,217 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 1148 flow [2024-06-21 20:48:40,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1148, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-06-21 20:48:40,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 20:48:40,218 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 1148 flow [2024-06-21 20:48:40,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:40,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:40,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:40,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:48:40,218 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)] === [2024-06-21 20:48:40,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash 283296003, now seen corresponding path program 3 times [2024-06-21 20:48:40,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:40,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258739108] [2024-06-21 20:48:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:40,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:41,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258739108] [2024-06-21 20:48:41,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258739108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:41,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:41,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:41,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273368331] [2024-06-21 20:48:41,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:41,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:41,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:41,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:41,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:41,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:41,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 1148 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:41,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:41,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:41,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:41,733 INFO L124 PetriNetUnfolderBase]: 1731/2791 cut-off events. [2024-06-21 20:48:41,734 INFO L125 PetriNetUnfolderBase]: For 58709/58712 co-relation queries the response was YES. [2024-06-21 20:48:41,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16092 conditions, 2791 events. 1731/2791 cut-off events. For 58709/58712 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15202 event pairs, 284 based on Foata normal form. 12/2794 useless extension candidates. Maximal degree in co-relation 16041. Up to 1677 conditions per place. [2024-06-21 20:48:41,752 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 39 changer transitions 0/146 dead transitions. [2024-06-21 20:48:41,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 146 transitions, 1486 flow [2024-06-21 20:48:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:48:41,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 20:48:41,753 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 1148 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:48:41,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 146 transitions, 1486 flow [2024-06-21 20:48:41,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 146 transitions, 1380 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:41,791 INFO L231 Difference]: Finished difference. Result has 118 places, 121 transitions, 1092 flow [2024-06-21 20:48:41,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=118, PETRI_TRANSITIONS=121} [2024-06-21 20:48:41,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 20:48:41,792 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 121 transitions, 1092 flow [2024-06-21 20:48:41,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:41,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:41,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:41,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:48:41,793 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:41,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash 398761822, now seen corresponding path program 2 times [2024-06-21 20:48:41,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:41,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664713667] [2024-06-21 20:48:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:42,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:42,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664713667] [2024-06-21 20:48:42,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664713667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:42,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:42,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:42,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793439031] [2024-06-21 20:48:42,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:42,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:42,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:42,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:42,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 121 transitions, 1092 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:42,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:42,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:42,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:43,116 INFO L124 PetriNetUnfolderBase]: 1736/2800 cut-off events. [2024-06-21 20:48:43,116 INFO L125 PetriNetUnfolderBase]: For 55932/55938 co-relation queries the response was YES. [2024-06-21 20:48:43,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16076 conditions, 2800 events. 1736/2800 cut-off events. For 55932/55938 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15256 event pairs, 502 based on Foata normal form. 5/2801 useless extension candidates. Maximal degree in co-relation 16024. Up to 2625 conditions per place. [2024-06-21 20:48:43,136 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2024-06-21 20:48:43,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 140 transitions, 1546 flow [2024-06-21 20:48:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 20:48:43,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 20:48:43,137 INFO L175 Difference]: Start difference. First operand has 118 places, 121 transitions, 1092 flow. Second operand 7 states and 122 transitions. [2024-06-21 20:48:43,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 140 transitions, 1546 flow [2024-06-21 20:48:43,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 140 transitions, 1435 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:43,177 INFO L231 Difference]: Finished difference. Result has 120 places, 129 transitions, 1168 flow [2024-06-21 20:48:43,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1168, PETRI_PLACES=120, PETRI_TRANSITIONS=129} [2024-06-21 20:48:43,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-21 20:48:43,178 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 129 transitions, 1168 flow [2024-06-21 20:48:43,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:43,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:43,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:43,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:48:43,188 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:43,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 398346112, now seen corresponding path program 3 times [2024-06-21 20:48:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:43,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65981919] [2024-06-21 20:48:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:43,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:44,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65981919] [2024-06-21 20:48:44,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65981919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:44,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:44,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:44,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266015776] [2024-06-21 20:48:44,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:44,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:44,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:44,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:44,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:44,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:44,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 129 transitions, 1168 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:44,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:44,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:44,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:44,558 INFO L124 PetriNetUnfolderBase]: 1733/2796 cut-off events. [2024-06-21 20:48:44,558 INFO L125 PetriNetUnfolderBase]: For 59309/59315 co-relation queries the response was YES. [2024-06-21 20:48:44,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16006 conditions, 2796 events. 1733/2796 cut-off events. For 59309/59315 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15270 event pairs, 502 based on Foata normal form. 5/2797 useless extension candidates. Maximal degree in co-relation 15953. Up to 2631 conditions per place. [2024-06-21 20:48:44,578 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 116 selfloop transitions, 19 changer transitions 0/140 dead transitions. [2024-06-21 20:48:44,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 140 transitions, 1471 flow [2024-06-21 20:48:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:48:44,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 20:48:44,580 INFO L175 Difference]: Start difference. First operand has 120 places, 129 transitions, 1168 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:48:44,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 140 transitions, 1471 flow [2024-06-21 20:48:44,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 140 transitions, 1373 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:44,613 INFO L231 Difference]: Finished difference. Result has 124 places, 130 transitions, 1123 flow [2024-06-21 20:48:44,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1123, PETRI_PLACES=124, PETRI_TRANSITIONS=130} [2024-06-21 20:48:44,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 20:48:44,614 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 130 transitions, 1123 flow [2024-06-21 20:48:44,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:44,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:44,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:48:44,615 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:44,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash 398345740, now seen corresponding path program 3 times [2024-06-21 20:48:44,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:44,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84235086] [2024-06-21 20:48:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:44,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:45,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84235086] [2024-06-21 20:48:45,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84235086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:45,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:45,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:45,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114475299] [2024-06-21 20:48:45,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:45,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:45,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:45,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:45,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:45,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:45,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 130 transitions, 1123 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:45,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:45,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:45,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:45,823 INFO L124 PetriNetUnfolderBase]: 1760/2839 cut-off events. [2024-06-21 20:48:45,823 INFO L125 PetriNetUnfolderBase]: For 63886/63889 co-relation queries the response was YES. [2024-06-21 20:48:45,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16409 conditions, 2839 events. 1760/2839 cut-off events. For 63886/63889 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15534 event pairs, 526 based on Foata normal form. 5/2836 useless extension candidates. Maximal degree in co-relation 16354. Up to 2506 conditions per place. [2024-06-21 20:48:45,844 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 106 selfloop transitions, 42 changer transitions 0/153 dead transitions. [2024-06-21 20:48:45,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 153 transitions, 1699 flow [2024-06-21 20:48:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:48:45,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-21 20:48:45,846 INFO L175 Difference]: Start difference. First operand has 124 places, 130 transitions, 1123 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:48:45,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 153 transitions, 1699 flow [2024-06-21 20:48:45,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 153 transitions, 1657 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:45,888 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1315 flow [2024-06-21 20:48:45,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1315, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2024-06-21 20:48:45,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 20:48:45,888 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1315 flow [2024-06-21 20:48:45,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:45,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:45,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:45,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:48:45,889 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)] === [2024-06-21 20:48:45,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:45,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1661781980, now seen corresponding path program 1 times [2024-06-21 20:48:45,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:45,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894814810] [2024-06-21 20:48:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:45,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:46,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:46,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894814810] [2024-06-21 20:48:46,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894814810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:46,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:46,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:46,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971638944] [2024-06-21 20:48:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:46,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:46,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:46,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 1315 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:46,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:46,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:46,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:47,336 INFO L124 PetriNetUnfolderBase]: 1653/2731 cut-off events. [2024-06-21 20:48:47,336 INFO L125 PetriNetUnfolderBase]: For 71739/71739 co-relation queries the response was YES. [2024-06-21 20:48:47,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16671 conditions, 2731 events. 1653/2731 cut-off events. For 71739/71739 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15381 event pairs, 459 based on Foata normal form. 1/2729 useless extension candidates. Maximal degree in co-relation 16614. Up to 2490 conditions per place. [2024-06-21 20:48:47,355 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 131 selfloop transitions, 15 changer transitions 0/156 dead transitions. [2024-06-21 20:48:47,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 156 transitions, 1693 flow [2024-06-21 20:48:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:48:47,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 20:48:47,357 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1315 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:48:47,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 156 transitions, 1693 flow [2024-06-21 20:48:47,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 156 transitions, 1557 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:47,404 INFO L231 Difference]: Finished difference. Result has 130 places, 141 transitions, 1269 flow [2024-06-21 20:48:47,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1269, PETRI_PLACES=130, PETRI_TRANSITIONS=141} [2024-06-21 20:48:47,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 20:48:47,406 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 141 transitions, 1269 flow [2024-06-21 20:48:47,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:47,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:47,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:47,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:48:47,407 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:47,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash 304822122, now seen corresponding path program 1 times [2024-06-21 20:48:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:47,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088851716] [2024-06-21 20:48:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:48,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:48,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088851716] [2024-06-21 20:48:48,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088851716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:48,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:48,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671397738] [2024-06-21 20:48:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:48,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:48,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:48,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:48,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 141 transitions, 1269 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:48,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:48,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:48,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:48,824 INFO L124 PetriNetUnfolderBase]: 1673/2765 cut-off events. [2024-06-21 20:48:48,824 INFO L125 PetriNetUnfolderBase]: For 76945/76945 co-relation queries the response was YES. [2024-06-21 20:48:48,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16686 conditions, 2765 events. 1673/2765 cut-off events. For 76945/76945 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15594 event pairs, 456 based on Foata normal form. 6/2768 useless extension candidates. Maximal degree in co-relation 16628. Up to 2512 conditions per place. [2024-06-21 20:48:48,843 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 16 changer transitions 0/159 dead transitions. [2024-06-21 20:48:48,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 159 transitions, 1651 flow [2024-06-21 20:48:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:48:48,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 20:48:48,845 INFO L175 Difference]: Start difference. First operand has 130 places, 141 transitions, 1269 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:48:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 159 transitions, 1651 flow [2024-06-21 20:48:48,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 159 transitions, 1587 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:48,892 INFO L231 Difference]: Finished difference. Result has 132 places, 145 transitions, 1294 flow [2024-06-21 20:48:48,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1294, PETRI_PLACES=132, PETRI_TRANSITIONS=145} [2024-06-21 20:48:48,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 20:48:48,893 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 145 transitions, 1294 flow [2024-06-21 20:48:48,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:48,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:48,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:48,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:48:48,894 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:48,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:48,894 INFO L85 PathProgramCache]: Analyzing trace with hash -464506428, now seen corresponding path program 2 times [2024-06-21 20:48:48,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:48,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903355999] [2024-06-21 20:48:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:48,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:49,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:49,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903355999] [2024-06-21 20:48:49,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903355999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:49,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:49,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334650735] [2024-06-21 20:48:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:49,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:49,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:49,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:49,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:49,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 145 transitions, 1294 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:49,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:49,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:49,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:50,267 INFO L124 PetriNetUnfolderBase]: 1693/2798 cut-off events. [2024-06-21 20:48:50,267 INFO L125 PetriNetUnfolderBase]: For 82348/82351 co-relation queries the response was YES. [2024-06-21 20:48:50,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17410 conditions, 2798 events. 1693/2798 cut-off events. For 82348/82351 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15839 event pairs, 460 based on Foata normal form. 8/2802 useless extension candidates. Maximal degree in co-relation 17351. Up to 2531 conditions per place. [2024-06-21 20:48:50,286 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 21 changer transitions 0/161 dead transitions. [2024-06-21 20:48:50,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 161 transitions, 1692 flow [2024-06-21 20:48:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:48:50,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 20:48:50,287 INFO L175 Difference]: Start difference. First operand has 132 places, 145 transitions, 1294 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:48:50,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 161 transitions, 1692 flow [2024-06-21 20:48:50,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 161 transitions, 1633 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:50,328 INFO L231 Difference]: Finished difference. Result has 134 places, 149 transitions, 1342 flow [2024-06-21 20:48:50,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1342, PETRI_PLACES=134, PETRI_TRANSITIONS=149} [2024-06-21 20:48:50,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 20:48:50,329 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 149 transitions, 1342 flow [2024-06-21 20:48:50,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:50,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:50,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:50,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:48:50,329 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:50,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash 398537134, now seen corresponding path program 3 times [2024-06-21 20:48:50,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:50,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600830147] [2024-06-21 20:48:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:50,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:51,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:51,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600830147] [2024-06-21 20:48:51,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600830147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:51,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:51,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:51,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391598380] [2024-06-21 20:48:51,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:51,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:51,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:51,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:51,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:48:51,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 1342 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:51,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:51,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:48:51,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:51,622 INFO L124 PetriNetUnfolderBase]: 1707/2810 cut-off events. [2024-06-21 20:48:51,623 INFO L125 PetriNetUnfolderBase]: For 83840/83843 co-relation queries the response was YES. [2024-06-21 20:48:51,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17861 conditions, 2810 events. 1707/2810 cut-off events. For 83840/83843 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15803 event pairs, 470 based on Foata normal form. 5/2811 useless extension candidates. Maximal degree in co-relation 17801. Up to 2514 conditions per place. [2024-06-21 20:48:51,641 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 34 changer transitions 0/168 dead transitions. [2024-06-21 20:48:51,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 1858 flow [2024-06-21 20:48:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:48:51,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-21 20:48:51,643 INFO L175 Difference]: Start difference. First operand has 134 places, 149 transitions, 1342 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:48:51,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 1858 flow [2024-06-21 20:48:51,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 168 transitions, 1781 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:51,692 INFO L231 Difference]: Finished difference. Result has 137 places, 155 transitions, 1463 flow [2024-06-21 20:48:51,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1463, PETRI_PLACES=137, PETRI_TRANSITIONS=155} [2024-06-21 20:48:51,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 20:48:51,693 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 155 transitions, 1463 flow [2024-06-21 20:48:51,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:51,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:51,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:48:51,694 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)] === [2024-06-21 20:48:51,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash 398776702, now seen corresponding path program 1 times [2024-06-21 20:48:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:51,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004625647] [2024-06-21 20:48:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:51,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:53,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004625647] [2024-06-21 20:48:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004625647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:53,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:53,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:53,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804379756] [2024-06-21 20:48:53,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:53,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:53,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:53,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 155 transitions, 1463 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:53,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:53,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:53,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:53,640 INFO L124 PetriNetUnfolderBase]: 1805/2903 cut-off events. [2024-06-21 20:48:53,641 INFO L125 PetriNetUnfolderBase]: For 87880/87880 co-relation queries the response was YES. [2024-06-21 20:48:53,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18837 conditions, 2903 events. 1805/2903 cut-off events. For 87880/87880 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15924 event pairs, 497 based on Foata normal form. 1/2901 useless extension candidates. Maximal degree in co-relation 18775. Up to 2748 conditions per place. [2024-06-21 20:48:53,662 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 18 changer transitions 0/165 dead transitions. [2024-06-21 20:48:53,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 165 transitions, 1807 flow [2024-06-21 20:48:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:48:53,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:48:53,663 INFO L175 Difference]: Start difference. First operand has 137 places, 155 transitions, 1463 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:48:53,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 165 transitions, 1807 flow [2024-06-21 20:48:53,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 165 transitions, 1722 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:53,727 INFO L231 Difference]: Finished difference. Result has 142 places, 155 transitions, 1420 flow [2024-06-21 20:48:53,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1420, PETRI_PLACES=142, PETRI_TRANSITIONS=155} [2024-06-21 20:48:53,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 20:48:53,728 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 155 transitions, 1420 flow [2024-06-21 20:48:53,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:53,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:53,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:53,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:48:53,729 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)] === [2024-06-21 20:48:53,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1293231538, now seen corresponding path program 1 times [2024-06-21 20:48:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:53,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92698745] [2024-06-21 20:48:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:53,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:54,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92698745] [2024-06-21 20:48:54,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92698745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:54,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:54,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:54,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788392579] [2024-06-21 20:48:54,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:54,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:54,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:54,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:54,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:54,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:54,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 155 transitions, 1420 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:54,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:54,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:54,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:55,217 INFO L124 PetriNetUnfolderBase]: 1820/2927 cut-off events. [2024-06-21 20:48:55,218 INFO L125 PetriNetUnfolderBase]: For 92764/92767 co-relation queries the response was YES. [2024-06-21 20:48:55,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19033 conditions, 2927 events. 1820/2927 cut-off events. For 92764/92767 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16045 event pairs, 500 based on Foata normal form. 5/2928 useless extension candidates. Maximal degree in co-relation 18969. Up to 2683 conditions per place. [2024-06-21 20:48:55,240 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 148 selfloop transitions, 30 changer transitions 0/183 dead transitions. [2024-06-21 20:48:55,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 183 transitions, 1926 flow [2024-06-21 20:48:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:48:55,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:48:55,241 INFO L175 Difference]: Start difference. First operand has 142 places, 155 transitions, 1420 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:48:55,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 183 transitions, 1926 flow [2024-06-21 20:48:55,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 183 transitions, 1830 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 20:48:55,296 INFO L231 Difference]: Finished difference. Result has 142 places, 160 transitions, 1478 flow [2024-06-21 20:48:55,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1478, PETRI_PLACES=142, PETRI_TRANSITIONS=160} [2024-06-21 20:48:55,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 20:48:55,297 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 160 transitions, 1478 flow [2024-06-21 20:48:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:55,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:55,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:55,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:48:55,298 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)] === [2024-06-21 20:48:55,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1289687401, now seen corresponding path program 1 times [2024-06-21 20:48:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:55,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104184506] [2024-06-21 20:48:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:55,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:55,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:55,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104184506] [2024-06-21 20:48:55,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104184506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:55,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:55,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:55,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911738926] [2024-06-21 20:48:55,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:55,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:55,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:55,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 160 transitions, 1478 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:55,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:55,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:55,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:56,444 INFO L124 PetriNetUnfolderBase]: 1840/2959 cut-off events. [2024-06-21 20:48:56,445 INFO L125 PetriNetUnfolderBase]: For 100266/100269 co-relation queries the response was YES. [2024-06-21 20:48:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20007 conditions, 2959 events. 1840/2959 cut-off events. For 100266/100269 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16281 event pairs, 496 based on Foata normal form. 6/2961 useless extension candidates. Maximal degree in co-relation 19943. Up to 2717 conditions per place. [2024-06-21 20:48:56,465 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 24 changer transitions 0/183 dead transitions. [2024-06-21 20:48:56,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 183 transitions, 1955 flow [2024-06-21 20:48:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:48:56,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:48:56,473 INFO L175 Difference]: Start difference. First operand has 142 places, 160 transitions, 1478 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:48:56,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 183 transitions, 1955 flow [2024-06-21 20:48:56,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 183 transitions, 1835 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:56,538 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1478 flow [2024-06-21 20:48:56,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1478, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2024-06-21 20:48:56,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 20:48:56,539 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1478 flow [2024-06-21 20:48:56,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:56,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:56,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:48:56,540 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)] === [2024-06-21 20:48:56,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973481, now seen corresponding path program 2 times [2024-06-21 20:48:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:56,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260658084] [2024-06-21 20:48:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:57,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:57,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260658084] [2024-06-21 20:48:57,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260658084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:57,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:48:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366146705] [2024-06-21 20:48:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:48:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:48:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:48:57,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:57,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1478 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:57,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:57,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:57,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:57,710 INFO L124 PetriNetUnfolderBase]: 1844/2967 cut-off events. [2024-06-21 20:48:57,711 INFO L125 PetriNetUnfolderBase]: For 104313/104316 co-relation queries the response was YES. [2024-06-21 20:48:57,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20113 conditions, 2967 events. 1844/2967 cut-off events. For 104313/104316 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16377 event pairs, 497 based on Foata normal form. 6/2969 useless extension candidates. Maximal degree in co-relation 20048. Up to 2666 conditions per place. [2024-06-21 20:48:57,733 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-21 20:48:57,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 185 transitions, 2036 flow [2024-06-21 20:48:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:48:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:48:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:48:57,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:48:57,735 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1478 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:48:57,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 185 transitions, 2036 flow [2024-06-21 20:48:57,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 185 transitions, 1973 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:57,803 INFO L231 Difference]: Finished difference. Result has 147 places, 167 transitions, 1554 flow [2024-06-21 20:48:57,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1554, PETRI_PLACES=147, PETRI_TRANSITIONS=167} [2024-06-21 20:48:57,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 20:48:57,804 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 167 transitions, 1554 flow [2024-06-21 20:48:57,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:57,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:57,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:57,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:48:57,804 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)] === [2024-06-21 20:48:57,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1283965948, now seen corresponding path program 2 times [2024-06-21 20:48:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:57,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932134711] [2024-06-21 20:48:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:57,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:58,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932134711] [2024-06-21 20:48:58,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932134711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:58,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:58,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:58,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209974853] [2024-06-21 20:48:58,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:58,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:58,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:58,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:58,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:58,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:58,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 167 transitions, 1554 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:58,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:58,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:58,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:59,264 INFO L124 PetriNetUnfolderBase]: 1903/3059 cut-off events. [2024-06-21 20:48:59,264 INFO L125 PetriNetUnfolderBase]: For 112763/112766 co-relation queries the response was YES. [2024-06-21 20:48:59,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21036 conditions, 3059 events. 1903/3059 cut-off events. For 112763/112766 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16946 event pairs, 496 based on Foata normal form. 5/3060 useless extension candidates. Maximal degree in co-relation 20970. Up to 2676 conditions per place. [2024-06-21 20:48:59,290 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 144 selfloop transitions, 48 changer transitions 0/197 dead transitions. [2024-06-21 20:48:59,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 197 transitions, 2338 flow [2024-06-21 20:48:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:48:59,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 20:48:59,300 INFO L175 Difference]: Start difference. First operand has 147 places, 167 transitions, 1554 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:48:59,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 197 transitions, 2338 flow [2024-06-21 20:48:59,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 197 transitions, 2249 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:59,379 INFO L231 Difference]: Finished difference. Result has 152 places, 177 transitions, 1768 flow [2024-06-21 20:48:59,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1768, PETRI_PLACES=152, PETRI_TRANSITIONS=177} [2024-06-21 20:48:59,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 20:48:59,379 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 177 transitions, 1768 flow [2024-06-21 20:48:59,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:59,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:59,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:59,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:48:59,380 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)] === [2024-06-21 20:48:59,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:59,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1283965545, now seen corresponding path program 1 times [2024-06-21 20:48:59,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:59,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277461397] [2024-06-21 20:48:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:59,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:00,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:00,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277461397] [2024-06-21 20:49:00,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277461397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:00,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:00,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:00,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117899028] [2024-06-21 20:49:00,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:00,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:00,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:00,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:00,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:00,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:00,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 1768 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:00,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:00,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:00,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:00,801 INFO L124 PetriNetUnfolderBase]: 1913/3072 cut-off events. [2024-06-21 20:49:00,801 INFO L125 PetriNetUnfolderBase]: For 123013/123013 co-relation queries the response was YES. [2024-06-21 20:49:00,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22176 conditions, 3072 events. 1913/3072 cut-off events. For 123013/123013 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16992 event pairs, 493 based on Foata normal form. 2/3071 useless extension candidates. Maximal degree in co-relation 22108. Up to 2884 conditions per place. [2024-06-21 20:49:00,826 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 18 changer transitions 0/197 dead transitions. [2024-06-21 20:49:00,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 197 transitions, 2268 flow [2024-06-21 20:49:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:49:00,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 20:49:00,827 INFO L175 Difference]: Start difference. First operand has 152 places, 177 transitions, 1768 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:49:00,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 197 transitions, 2268 flow [2024-06-21 20:49:00,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 197 transitions, 2132 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 20:49:00,916 INFO L231 Difference]: Finished difference. Result has 156 places, 180 transitions, 1750 flow [2024-06-21 20:49:00,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1750, PETRI_PLACES=156, PETRI_TRANSITIONS=180} [2024-06-21 20:49:00,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-21 20:49:00,917 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 180 transitions, 1750 flow [2024-06-21 20:49:00,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:00,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:00,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:00,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:49:00,917 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)] === [2024-06-21 20:49:00,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1366565512, now seen corresponding path program 3 times [2024-06-21 20:49:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:00,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824357958] [2024-06-21 20:49:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:01,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:01,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824357958] [2024-06-21 20:49:01,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824357958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:01,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:01,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063471244] [2024-06-21 20:49:01,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:01,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:01,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:01,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:01,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 180 transitions, 1750 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:01,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:01,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:01,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:02,394 INFO L124 PetriNetUnfolderBase]: 1924/3089 cut-off events. [2024-06-21 20:49:02,395 INFO L125 PetriNetUnfolderBase]: For 127943/127946 co-relation queries the response was YES. [2024-06-21 20:49:02,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22453 conditions, 3089 events. 1924/3089 cut-off events. For 127943/127946 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17109 event pairs, 494 based on Foata normal form. 5/3090 useless extension candidates. Maximal degree in co-relation 22383. Up to 2767 conditions per place. [2024-06-21 20:49:02,420 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 42 changer transitions 0/204 dead transitions. [2024-06-21 20:49:02,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 204 transitions, 2394 flow [2024-06-21 20:49:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:49:02,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:49:02,422 INFO L175 Difference]: Start difference. First operand has 156 places, 180 transitions, 1750 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:49:02,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 204 transitions, 2394 flow [2024-06-21 20:49:02,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 204 transitions, 2300 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:02,519 INFO L231 Difference]: Finished difference. Result has 158 places, 185 transitions, 1846 flow [2024-06-21 20:49:02,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1846, PETRI_PLACES=158, PETRI_TRANSITIONS=185} [2024-06-21 20:49:02,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 20:49:02,520 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 185 transitions, 1846 flow [2024-06-21 20:49:02,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:02,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:02,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:02,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:49:02,521 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)] === [2024-06-21 20:49:02,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:02,521 INFO L85 PathProgramCache]: Analyzing trace with hash 16651123, now seen corresponding path program 3 times [2024-06-21 20:49:02,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:02,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244359158] [2024-06-21 20:49:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:02,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:03,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:03,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244359158] [2024-06-21 20:49:03,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244359158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:03,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:03,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:49:03,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55175120] [2024-06-21 20:49:03,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:03,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:49:03,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:49:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:49:03,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:03,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 185 transitions, 1846 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:03,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:03,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:03,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:03,719 INFO L124 PetriNetUnfolderBase]: 1910/3062 cut-off events. [2024-06-21 20:49:03,719 INFO L125 PetriNetUnfolderBase]: For 131949/131955 co-relation queries the response was YES. [2024-06-21 20:49:03,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22483 conditions, 3062 events. 1910/3062 cut-off events. For 131949/131955 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16874 event pairs, 507 based on Foata normal form. 3/3056 useless extension candidates. Maximal degree in co-relation 22412. Up to 2821 conditions per place. [2024-06-21 20:49:03,746 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 174 selfloop transitions, 23 changer transitions 0/202 dead transitions. [2024-06-21 20:49:03,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 202 transitions, 2302 flow [2024-06-21 20:49:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:49:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:49:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:49:03,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 20:49:03,747 INFO L175 Difference]: Start difference. First operand has 158 places, 185 transitions, 1846 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:49:03,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 202 transitions, 2302 flow [2024-06-21 20:49:03,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 202 transitions, 2132 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:03,844 INFO L231 Difference]: Finished difference. Result has 159 places, 185 transitions, 1728 flow [2024-06-21 20:49:03,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1728, PETRI_PLACES=159, PETRI_TRANSITIONS=185} [2024-06-21 20:49:03,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-21 20:49:03,855 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 185 transitions, 1728 flow [2024-06-21 20:49:03,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:03,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:03,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:03,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:49:03,856 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)] === [2024-06-21 20:49:03,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1145468581, now seen corresponding path program 4 times [2024-06-21 20:49:03,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:03,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853148051] [2024-06-21 20:49:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:03,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:04,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:04,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853148051] [2024-06-21 20:49:04,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853148051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:04,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:04,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:49:04,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951594997] [2024-06-21 20:49:04,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:04,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:49:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:49:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:49:04,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:04,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 185 transitions, 1728 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:04,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:04,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:04,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:05,160 INFO L124 PetriNetUnfolderBase]: 1920/3079 cut-off events. [2024-06-21 20:49:05,160 INFO L125 PetriNetUnfolderBase]: For 136625/136625 co-relation queries the response was YES. [2024-06-21 20:49:05,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22570 conditions, 3079 events. 1920/3079 cut-off events. For 136625/136625 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17033 event pairs, 501 based on Foata normal form. 2/3074 useless extension candidates. Maximal degree in co-relation 22498. Up to 2809 conditions per place. [2024-06-21 20:49:05,187 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 32 changer transitions 0/203 dead transitions. [2024-06-21 20:49:05,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 203 transitions, 2250 flow [2024-06-21 20:49:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:49:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:49:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:49:05,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 20:49:05,188 INFO L175 Difference]: Start difference. First operand has 159 places, 185 transitions, 1728 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:49:05,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 203 transitions, 2250 flow [2024-06-21 20:49:05,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 203 transitions, 2110 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 20:49:05,332 INFO L231 Difference]: Finished difference. Result has 156 places, 188 transitions, 1716 flow [2024-06-21 20:49:05,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=156, PETRI_TRANSITIONS=188} [2024-06-21 20:49:05,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-21 20:49:05,333 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 188 transitions, 1716 flow [2024-06-21 20:49:05,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:05,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:05,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:05,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:49:05,334 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)] === [2024-06-21 20:49:05,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:05,334 INFO L85 PathProgramCache]: Analyzing trace with hash -536178509, now seen corresponding path program 5 times [2024-06-21 20:49:05,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:05,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362301488] [2024-06-21 20:49:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:05,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:06,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362301488] [2024-06-21 20:49:06,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362301488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:06,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:06,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:49:06,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783225330] [2024-06-21 20:49:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:06,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:49:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:49:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:49:06,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:06,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 188 transitions, 1716 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:06,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:06,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:06,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:06,526 INFO L124 PetriNetUnfolderBase]: 1924/3088 cut-off events. [2024-06-21 20:49:06,526 INFO L125 PetriNetUnfolderBase]: For 142335/142338 co-relation queries the response was YES. [2024-06-21 20:49:06,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22682 conditions, 3088 events. 1924/3088 cut-off events. For 142335/142338 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17142 event pairs, 516 based on Foata normal form. 6/3086 useless extension candidates. Maximal degree in co-relation 22609. Up to 2713 conditions per place. [2024-06-21 20:49:06,551 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 149 selfloop transitions, 51 changer transitions 0/205 dead transitions. [2024-06-21 20:49:06,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 205 transitions, 2342 flow [2024-06-21 20:49:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:49:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:49:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:49:06,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-21 20:49:06,553 INFO L175 Difference]: Start difference. First operand has 156 places, 188 transitions, 1716 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:49:06,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 205 transitions, 2342 flow [2024-06-21 20:49:06,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 205 transitions, 2246 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:49:06,644 INFO L231 Difference]: Finished difference. Result has 158 places, 191 transitions, 1790 flow [2024-06-21 20:49:06,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1790, PETRI_PLACES=158, PETRI_TRANSITIONS=191} [2024-06-21 20:49:06,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 20:49:06,645 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 191 transitions, 1790 flow [2024-06-21 20:49:06,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:06,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:06,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:06,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:49:06,646 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)] === [2024-06-21 20:49:06,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:06,646 INFO L85 PathProgramCache]: Analyzing trace with hash -530464589, now seen corresponding path program 6 times [2024-06-21 20:49:06,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:06,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235466533] [2024-06-21 20:49:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:07,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:07,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235466533] [2024-06-21 20:49:07,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235466533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:07,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:07,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988085905] [2024-06-21 20:49:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:07,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:07,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:07,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:07,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 191 transitions, 1790 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:07,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:07,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:07,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:08,088 INFO L124 PetriNetUnfolderBase]: 1914/3072 cut-off events. [2024-06-21 20:49:08,088 INFO L125 PetriNetUnfolderBase]: For 145322/145325 co-relation queries the response was YES. [2024-06-21 20:49:08,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22668 conditions, 3072 events. 1914/3072 cut-off events. For 145322/145325 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17070 event pairs, 519 based on Foata normal form. 4/3068 useless extension candidates. Maximal degree in co-relation 22594. Up to 2705 conditions per place. [2024-06-21 20:49:08,114 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 55 changer transitions 0/204 dead transitions. [2024-06-21 20:49:08,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 204 transitions, 2274 flow [2024-06-21 20:49:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:49:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:49:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 20:49:08,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 20:49:08,136 INFO L175 Difference]: Start difference. First operand has 158 places, 191 transitions, 1790 flow. Second operand 7 states and 129 transitions. [2024-06-21 20:49:08,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 204 transitions, 2274 flow [2024-06-21 20:49:08,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 204 transitions, 2118 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 20:49:08,254 INFO L231 Difference]: Finished difference. Result has 161 places, 191 transitions, 1750 flow [2024-06-21 20:49:08,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=161, PETRI_TRANSITIONS=191} [2024-06-21 20:49:08,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-21 20:49:08,255 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 191 transitions, 1750 flow [2024-06-21 20:49:08,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:08,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:08,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:08,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:49:08,256 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)] === [2024-06-21 20:49:08,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash -523283563, now seen corresponding path program 2 times [2024-06-21 20:49:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:08,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998910654] [2024-06-21 20:49:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:08,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:09,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:09,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998910654] [2024-06-21 20:49:09,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998910654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:09,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:09,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:09,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531462939] [2024-06-21 20:49:09,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:09,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:09,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:09,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:09,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 191 transitions, 1750 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:09,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:09,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:09,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:09,676 INFO L124 PetriNetUnfolderBase]: 1927/3089 cut-off events. [2024-06-21 20:49:09,677 INFO L125 PetriNetUnfolderBase]: For 151120/151126 co-relation queries the response was YES. [2024-06-21 20:49:09,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22919 conditions, 3089 events. 1927/3089 cut-off events. For 151120/151126 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17069 event pairs, 494 based on Foata normal form. 5/3090 useless extension candidates. Maximal degree in co-relation 22844. Up to 2878 conditions per place. [2024-06-21 20:49:09,703 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 172 selfloop transitions, 38 changer transitions 0/215 dead transitions. [2024-06-21 20:49:09,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 215 transitions, 2596 flow [2024-06-21 20:49:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:49:09,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 20:49:09,704 INFO L175 Difference]: Start difference. First operand has 161 places, 191 transitions, 1750 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:49:09,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 215 transitions, 2596 flow [2024-06-21 20:49:09,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 215 transitions, 2446 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:09,814 INFO L231 Difference]: Finished difference. Result has 163 places, 202 transitions, 1935 flow [2024-06-21 20:49:09,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1935, PETRI_PLACES=163, PETRI_TRANSITIONS=202} [2024-06-21 20:49:09,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 20:49:09,815 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 202 transitions, 1935 flow [2024-06-21 20:49:09,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:09,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:09,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:09,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:49:09,816 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)] === [2024-06-21 20:49:09,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash -536170573, now seen corresponding path program 3 times [2024-06-21 20:49:09,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:09,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318893784] [2024-06-21 20:49:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:09,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:10,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:10,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318893784] [2024-06-21 20:49:10,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318893784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:10,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:10,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465850670] [2024-06-21 20:49:10,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:10,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:10,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:10,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 202 transitions, 1935 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:10,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:10,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:10,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:11,242 INFO L124 PetriNetUnfolderBase]: 1929/3094 cut-off events. [2024-06-21 20:49:11,242 INFO L125 PetriNetUnfolderBase]: For 158111/158117 co-relation queries the response was YES. [2024-06-21 20:49:11,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23158 conditions, 3094 events. 1929/3094 cut-off events. For 158111/158117 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17085 event pairs, 495 based on Foata normal form. 6/3096 useless extension candidates. Maximal degree in co-relation 23081. Up to 2901 conditions per place. [2024-06-21 20:49:11,266 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2024-06-21 20:49:11,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 2476 flow [2024-06-21 20:49:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:49:11,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 20:49:11,268 INFO L175 Difference]: Start difference. First operand has 163 places, 202 transitions, 1935 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:49:11,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 2476 flow [2024-06-21 20:49:11,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 2336 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-21 20:49:11,401 INFO L231 Difference]: Finished difference. Result has 168 places, 205 transitions, 1939 flow [2024-06-21 20:49:11,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1939, PETRI_PLACES=168, PETRI_TRANSITIONS=205} [2024-06-21 20:49:11,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-21 20:49:11,401 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 205 transitions, 1939 flow [2024-06-21 20:49:11,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:11,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:11,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:11,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:49:11,402 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)] === [2024-06-21 20:49:11,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:11,402 INFO L85 PathProgramCache]: Analyzing trace with hash -536170976, now seen corresponding path program 4 times [2024-06-21 20:49:11,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:11,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025870631] [2024-06-21 20:49:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:11,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025870631] [2024-06-21 20:49:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025870631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:12,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862816674] [2024-06-21 20:49:12,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:12,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:12,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:12,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:12,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 205 transitions, 1939 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:12,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:12,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:12,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:12,756 INFO L124 PetriNetUnfolderBase]: 1988/3183 cut-off events. [2024-06-21 20:49:12,756 INFO L125 PetriNetUnfolderBase]: For 171177/171180 co-relation queries the response was YES. [2024-06-21 20:49:12,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24383 conditions, 3183 events. 1988/3183 cut-off events. For 171177/171180 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17647 event pairs, 515 based on Foata normal form. 5/3180 useless extension candidates. Maximal degree in co-relation 24304. Up to 2755 conditions per place. [2024-06-21 20:49:12,785 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 165 selfloop transitions, 60 changer transitions 0/230 dead transitions. [2024-06-21 20:49:12,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 230 transitions, 2793 flow [2024-06-21 20:49:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:49:12,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:49:12,787 INFO L175 Difference]: Start difference. First operand has 168 places, 205 transitions, 1939 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:49:12,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 230 transitions, 2793 flow [2024-06-21 20:49:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 230 transitions, 2665 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:12,917 INFO L231 Difference]: Finished difference. Result has 171 places, 215 transitions, 2171 flow [2024-06-21 20:49:12,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2171, PETRI_PLACES=171, PETRI_TRANSITIONS=215} [2024-06-21 20:49:12,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-21 20:49:12,918 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 215 transitions, 2171 flow [2024-06-21 20:49:12,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:12,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:12,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:12,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:49:12,918 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)] === [2024-06-21 20:49:12,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:12,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1682438152, now seen corresponding path program 5 times [2024-06-21 20:49:12,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:12,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067190064] [2024-06-21 20:49:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:12,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:14,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:14,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067190064] [2024-06-21 20:49:14,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067190064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:14,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993983883] [2024-06-21 20:49:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:14,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:14,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:14,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 215 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:14,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:14,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:14,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:14,690 INFO L124 PetriNetUnfolderBase]: 2007/3216 cut-off events. [2024-06-21 20:49:14,691 INFO L125 PetriNetUnfolderBase]: For 184509/184512 co-relation queries the response was YES. [2024-06-21 20:49:14,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25748 conditions, 3216 events. 2007/3216 cut-off events. For 184509/184512 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17941 event pairs, 518 based on Foata normal form. 5/3213 useless extension candidates. Maximal degree in co-relation 25667. Up to 2662 conditions per place. [2024-06-21 20:49:14,724 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 150 selfloop transitions, 94 changer transitions 0/249 dead transitions. [2024-06-21 20:49:14,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 249 transitions, 3231 flow [2024-06-21 20:49:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:49:14,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 20:49:14,725 INFO L175 Difference]: Start difference. First operand has 171 places, 215 transitions, 2171 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:49:14,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 249 transitions, 3231 flow [2024-06-21 20:49:14,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 249 transitions, 3047 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-21 20:49:14,899 INFO L231 Difference]: Finished difference. Result has 177 places, 234 transitions, 2569 flow [2024-06-21 20:49:14,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2569, PETRI_PLACES=177, PETRI_TRANSITIONS=234} [2024-06-21 20:49:14,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 20:49:14,900 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 234 transitions, 2569 flow [2024-06-21 20:49:14,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:14,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:14,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:14,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:49:14,901 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)] === [2024-06-21 20:49:14,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash -523270543, now seen corresponding path program 4 times [2024-06-21 20:49:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:14,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613905297] [2024-06-21 20:49:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:14,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:15,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:15,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613905297] [2024-06-21 20:49:15,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613905297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:15,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:15,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491085765] [2024-06-21 20:49:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:15,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:15,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:16,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:16,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 234 transitions, 2569 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:16,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:16,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:16,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:16,717 INFO L124 PetriNetUnfolderBase]: 2004/3210 cut-off events. [2024-06-21 20:49:16,718 INFO L125 PetriNetUnfolderBase]: For 194677/194677 co-relation queries the response was YES. [2024-06-21 20:49:16,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26923 conditions, 3210 events. 2004/3210 cut-off events. For 194677/194677 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17827 event pairs, 488 based on Foata normal form. 1/3208 useless extension candidates. Maximal degree in co-relation 26838. Up to 3027 conditions per place. [2024-06-21 20:49:16,751 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 18 changer transitions 0/244 dead transitions. [2024-06-21 20:49:16,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 244 transitions, 3071 flow [2024-06-21 20:49:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:49:16,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:49:16,752 INFO L175 Difference]: Start difference. First operand has 177 places, 234 transitions, 2569 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:49:16,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 244 transitions, 3071 flow [2024-06-21 20:49:16,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 244 transitions, 2807 flow, removed 106 selfloop flow, removed 3 redundant places. [2024-06-21 20:49:16,939 INFO L231 Difference]: Finished difference. Result has 182 places, 234 transitions, 2347 flow [2024-06-21 20:49:16,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2347, PETRI_PLACES=182, PETRI_TRANSITIONS=234} [2024-06-21 20:49:16,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 20:49:16,939 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 234 transitions, 2347 flow [2024-06-21 20:49:16,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:16,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:16,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:16,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:49:16,940 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)] === [2024-06-21 20:49:16,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash -536182136, now seen corresponding path program 6 times [2024-06-21 20:49:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:16,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989881971] [2024-06-21 20:49:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:16,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:17,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:17,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989881971] [2024-06-21 20:49:17,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989881971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:17,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:17,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:17,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798093831] [2024-06-21 20:49:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:17,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:17,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:17,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:17,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 234 transitions, 2347 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:17,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:17,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:17,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:18,438 INFO L124 PetriNetUnfolderBase]: 2011/3220 cut-off events. [2024-06-21 20:49:18,439 INFO L125 PetriNetUnfolderBase]: For 192868/192871 co-relation queries the response was YES. [2024-06-21 20:49:18,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26114 conditions, 3220 events. 2011/3220 cut-off events. For 192868/192871 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17862 event pairs, 514 based on Foata normal form. 5/3217 useless extension candidates. Maximal degree in co-relation 26027. Up to 2832 conditions per place. [2024-06-21 20:49:18,472 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 190 selfloop transitions, 58 changer transitions 0/253 dead transitions. [2024-06-21 20:49:18,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 253 transitions, 3067 flow [2024-06-21 20:49:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:49:18,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:49:18,473 INFO L175 Difference]: Start difference. First operand has 182 places, 234 transitions, 2347 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:49:18,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 253 transitions, 3067 flow [2024-06-21 20:49:18,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 253 transitions, 3023 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:18,662 INFO L231 Difference]: Finished difference. Result has 183 places, 239 transitions, 2549 flow [2024-06-21 20:49:18,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2549, PETRI_PLACES=183, PETRI_TRANSITIONS=239} [2024-06-21 20:49:18,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-21 20:49:18,663 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 239 transitions, 2549 flow [2024-06-21 20:49:18,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:18,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:18,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:49:18,664 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)] === [2024-06-21 20:49:18,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash 27942904, now seen corresponding path program 1 times [2024-06-21 20:49:18,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:18,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831822059] [2024-06-21 20:49:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:18,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:19,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:19,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831822059] [2024-06-21 20:49:19,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831822059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:19,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:19,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:19,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104639280] [2024-06-21 20:49:19,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:19,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:19,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:19,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:19,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:49:19,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 239 transitions, 2549 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:19,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:19,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:49:19,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:20,373 INFO L124 PetriNetUnfolderBase]: 1966/3183 cut-off events. [2024-06-21 20:49:20,374 INFO L125 PetriNetUnfolderBase]: For 201773/201773 co-relation queries the response was YES. [2024-06-21 20:49:20,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26385 conditions, 3183 events. 1966/3183 cut-off events. For 201773/201773 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 17906 event pairs, 467 based on Foata normal form. 3/3183 useless extension candidates. Maximal degree in co-relation 26297. Up to 2831 conditions per place. [2024-06-21 20:49:20,404 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 18 changer transitions 0/259 dead transitions. [2024-06-21 20:49:20,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 259 transitions, 3131 flow [2024-06-21 20:49:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:49:20,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:49:20,405 INFO L175 Difference]: Start difference. First operand has 183 places, 239 transitions, 2549 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:49:20,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 259 transitions, 3131 flow [2024-06-21 20:49:20,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 259 transitions, 2943 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:20,619 INFO L231 Difference]: Finished difference. Result has 185 places, 242 transitions, 2467 flow [2024-06-21 20:49:20,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2467, PETRI_PLACES=185, PETRI_TRANSITIONS=242} [2024-06-21 20:49:20,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-21 20:49:20,619 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 242 transitions, 2467 flow [2024-06-21 20:49:20,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:20,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:20,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:20,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:49:20,620 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)] === [2024-06-21 20:49:20,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:20,621 INFO L85 PathProgramCache]: Analyzing trace with hash -729752708, now seen corresponding path program 2 times [2024-06-21 20:49:20,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:20,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156281464] [2024-06-21 20:49:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:20,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:21,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156281464] [2024-06-21 20:49:21,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156281464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:21,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:21,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:21,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288749260] [2024-06-21 20:49:21,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:21,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:21,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:21,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:21,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:21,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:49:21,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 242 transitions, 2467 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:21,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:21,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:49:21,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:22,346 INFO L124 PetriNetUnfolderBase]: 1989/3223 cut-off events. [2024-06-21 20:49:22,346 INFO L125 PetriNetUnfolderBase]: For 211421/211421 co-relation queries the response was YES. [2024-06-21 20:49:22,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26908 conditions, 3223 events. 1989/3223 cut-off events. For 211421/211421 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18220 event pairs, 466 based on Foata normal form. 3/3223 useless extension candidates. Maximal degree in co-relation 26819. Up to 2849 conditions per place. [2024-06-21 20:49:22,375 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 26 changer transitions 0/265 dead transitions. [2024-06-21 20:49:22,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 265 transitions, 3257 flow [2024-06-21 20:49:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:49:22,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:49:22,379 INFO L175 Difference]: Start difference. First operand has 185 places, 242 transitions, 2467 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:49:22,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 265 transitions, 3257 flow [2024-06-21 20:49:22,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 265 transitions, 3179 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:22,575 INFO L231 Difference]: Finished difference. Result has 187 places, 249 transitions, 2591 flow [2024-06-21 20:49:22,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2591, PETRI_PLACES=187, PETRI_TRANSITIONS=249} [2024-06-21 20:49:22,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-21 20:49:22,576 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 249 transitions, 2591 flow [2024-06-21 20:49:22,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:22,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:22,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:22,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:49:22,577 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)] === [2024-06-21 20:49:22,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1514795754, now seen corresponding path program 3 times [2024-06-21 20:49:22,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:22,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761087911] [2024-06-21 20:49:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:22,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:23,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:23,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761087911] [2024-06-21 20:49:23,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761087911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:23,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:23,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:23,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73978195] [2024-06-21 20:49:23,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:23,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:23,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:23,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:23,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:49:23,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 249 transitions, 2591 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:23,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:23,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:49:23,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:24,444 INFO L124 PetriNetUnfolderBase]: 2012/3266 cut-off events. [2024-06-21 20:49:24,444 INFO L125 PetriNetUnfolderBase]: For 222020/222023 co-relation queries the response was YES. [2024-06-21 20:49:24,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27742 conditions, 3266 events. 2012/3266 cut-off events. For 222020/222023 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18594 event pairs, 468 based on Foata normal form. 5/3267 useless extension candidates. Maximal degree in co-relation 27652. Up to 2869 conditions per place. [2024-06-21 20:49:24,475 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 31 changer transitions 0/270 dead transitions. [2024-06-21 20:49:24,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 270 transitions, 3429 flow [2024-06-21 20:49:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:49:24,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:49:24,477 INFO L175 Difference]: Start difference. First operand has 187 places, 249 transitions, 2591 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:49:24,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 270 transitions, 3429 flow [2024-06-21 20:49:24,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 270 transitions, 3350 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 20:49:24,669 INFO L231 Difference]: Finished difference. Result has 191 places, 256 transitions, 2738 flow [2024-06-21 20:49:24,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2738, PETRI_PLACES=191, PETRI_TRANSITIONS=256} [2024-06-21 20:49:24,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-21 20:49:24,670 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 256 transitions, 2738 flow [2024-06-21 20:49:24,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:24,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:24,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:24,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:49:24,671 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)] === [2024-06-21 20:49:24,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1507444104, now seen corresponding path program 4 times [2024-06-21 20:49:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:24,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223167835] [2024-06-21 20:49:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:24,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:26,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:26,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223167835] [2024-06-21 20:49:26,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223167835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:26,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:26,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134548526] [2024-06-21 20:49:26,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:26,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:26,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:49:26,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 256 transitions, 2738 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:26,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:26,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:49:26,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:26,950 INFO L124 PetriNetUnfolderBase]: 2006/3258 cut-off events. [2024-06-21 20:49:26,951 INFO L125 PetriNetUnfolderBase]: For 226278/226281 co-relation queries the response was YES. [2024-06-21 20:49:26,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28036 conditions, 3258 events. 2006/3258 cut-off events. For 226278/226281 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18522 event pairs, 465 based on Foata normal form. 4/3258 useless extension candidates. Maximal degree in co-relation 27944. Up to 2850 conditions per place. [2024-06-21 20:49:26,982 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 44 changer transitions 0/284 dead transitions. [2024-06-21 20:49:26,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 284 transitions, 3562 flow [2024-06-21 20:49:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:49:26,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:49:26,984 INFO L175 Difference]: Start difference. First operand has 191 places, 256 transitions, 2738 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:49:26,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 284 transitions, 3562 flow [2024-06-21 20:49:27,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 284 transitions, 3417 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 20:49:27,162 INFO L231 Difference]: Finished difference. Result has 197 places, 271 transitions, 2966 flow [2024-06-21 20:49:27,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2966, PETRI_PLACES=197, PETRI_TRANSITIONS=271} [2024-06-21 20:49:27,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 20:49:27,163 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 271 transitions, 2966 flow [2024-06-21 20:49:27,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:27,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:27,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:27,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:49:27,164 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)] === [2024-06-21 20:49:27,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash -522822221, now seen corresponding path program 1 times [2024-06-21 20:49:27,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:27,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907682568] [2024-06-21 20:49:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:27,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:28,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:28,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907682568] [2024-06-21 20:49:28,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907682568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:28,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:28,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:28,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730904049] [2024-06-21 20:49:28,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:28,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:28,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:28,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:28,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 271 transitions, 2966 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:28,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:28,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:28,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:28,909 INFO L124 PetriNetUnfolderBase]: 2061/3304 cut-off events. [2024-06-21 20:49:28,909 INFO L125 PetriNetUnfolderBase]: For 233452/233452 co-relation queries the response was YES. [2024-06-21 20:49:28,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28626 conditions, 3304 events. 2061/3304 cut-off events. For 233452/233452 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18423 event pairs, 484 based on Foata normal form. 2/3303 useless extension candidates. Maximal degree in co-relation 28530. Up to 3101 conditions per place. [2024-06-21 20:49:28,939 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 260 selfloop transitions, 19 changer transitions 0/284 dead transitions. [2024-06-21 20:49:28,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 284 transitions, 3630 flow [2024-06-21 20:49:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 20:49:28,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 20:49:28,940 INFO L175 Difference]: Start difference. First operand has 197 places, 271 transitions, 2966 flow. Second operand 8 states and 133 transitions. [2024-06-21 20:49:28,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 284 transitions, 3630 flow [2024-06-21 20:49:29,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 284 transitions, 3541 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 20:49:29,150 INFO L231 Difference]: Finished difference. Result has 202 places, 273 transitions, 3004 flow [2024-06-21 20:49:29,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3004, PETRI_PLACES=202, PETRI_TRANSITIONS=273} [2024-06-21 20:49:29,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 20:49:29,151 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 273 transitions, 3004 flow [2024-06-21 20:49:29,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:29,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:29,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:29,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:49:29,151 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)] === [2024-06-21 20:49:29,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash -881609367, now seen corresponding path program 1 times [2024-06-21 20:49:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165824641] [2024-06-21 20:49:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:29,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165824641] [2024-06-21 20:49:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165824641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:29,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:29,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741017254] [2024-06-21 20:49:29,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:29,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:29,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:29,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:29,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 273 transitions, 3004 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:29,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:29,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:29,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:30,604 INFO L124 PetriNetUnfolderBase]: 2097/3360 cut-off events. [2024-06-21 20:49:30,604 INFO L125 PetriNetUnfolderBase]: For 250611/250614 co-relation queries the response was YES. [2024-06-21 20:49:30,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29282 conditions, 3360 events. 2097/3360 cut-off events. For 250611/250614 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18734 event pairs, 362 based on Foata normal form. 12/3368 useless extension candidates. Maximal degree in co-relation 29184. Up to 3007 conditions per place. [2024-06-21 20:49:30,639 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 26 changer transitions 0/307 dead transitions. [2024-06-21 20:49:30,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 307 transitions, 3844 flow [2024-06-21 20:49:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:49:30,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-21 20:49:30,640 INFO L175 Difference]: Start difference. First operand has 202 places, 273 transitions, 3004 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:49:30,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 307 transitions, 3844 flow [2024-06-21 20:49:30,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 307 transitions, 3731 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:30,925 INFO L231 Difference]: Finished difference. Result has 205 places, 277 transitions, 3064 flow [2024-06-21 20:49:30,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3064, PETRI_PLACES=205, PETRI_TRANSITIONS=277} [2024-06-21 20:49:30,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 20:49:30,926 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 277 transitions, 3064 flow [2024-06-21 20:49:30,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:30,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:30,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:49:30,927 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)] === [2024-06-21 20:49:30,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash -873038487, now seen corresponding path program 2 times [2024-06-21 20:49:30,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:30,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440839013] [2024-06-21 20:49:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:31,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440839013] [2024-06-21 20:49:31,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440839013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:31,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:31,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666084644] [2024-06-21 20:49:31,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:31,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:31,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:31,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:31,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 277 transitions, 3064 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:31,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:31,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:31,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:32,410 INFO L124 PetriNetUnfolderBase]: 2141/3433 cut-off events. [2024-06-21 20:49:32,410 INFO L125 PetriNetUnfolderBase]: For 265268/265271 co-relation queries the response was YES. [2024-06-21 20:49:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30261 conditions, 3433 events. 2141/3433 cut-off events. For 265268/265271 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 19292 event pairs, 498 based on Foata normal form. 14/3443 useless extension candidates. Maximal degree in co-relation 30161. Up to 3106 conditions per place. [2024-06-21 20:49:32,446 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 275 selfloop transitions, 27 changer transitions 0/307 dead transitions. [2024-06-21 20:49:32,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 307 transitions, 3906 flow [2024-06-21 20:49:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:49:32,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 20:49:32,449 INFO L175 Difference]: Start difference. First operand has 205 places, 277 transitions, 3064 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:49:32,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 307 transitions, 3906 flow [2024-06-21 20:49:32,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 307 transitions, 3787 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 20:49:32,710 INFO L231 Difference]: Finished difference. Result has 208 places, 279 transitions, 3081 flow [2024-06-21 20:49:32,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3081, PETRI_PLACES=208, PETRI_TRANSITIONS=279} [2024-06-21 20:49:32,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 20:49:32,710 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 279 transitions, 3081 flow [2024-06-21 20:49:32,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:32,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:32,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:32,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:49:32,711 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)] === [2024-06-21 20:49:32,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:32,711 INFO L85 PathProgramCache]: Analyzing trace with hash -873027575, now seen corresponding path program 1 times [2024-06-21 20:49:32,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:32,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164948895] [2024-06-21 20:49:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:32,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:33,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:33,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164948895] [2024-06-21 20:49:33,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164948895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:33,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:33,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38935169] [2024-06-21 20:49:33,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:33,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:33,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:33,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 279 transitions, 3081 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:33,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:33,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:33,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:34,477 INFO L124 PetriNetUnfolderBase]: 2171/3481 cut-off events. [2024-06-21 20:49:34,477 INFO L125 PetriNetUnfolderBase]: For 265872/265875 co-relation queries the response was YES. [2024-06-21 20:49:34,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30717 conditions, 3481 events. 2171/3481 cut-off events. For 265872/265875 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19581 event pairs, 499 based on Foata normal form. 8/3485 useless extension candidates. Maximal degree in co-relation 30616. Up to 3169 conditions per place. [2024-06-21 20:49:34,516 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 269 selfloop transitions, 35 changer transitions 0/309 dead transitions. [2024-06-21 20:49:34,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 309 transitions, 3937 flow [2024-06-21 20:49:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:49:34,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 20:49:34,517 INFO L175 Difference]: Start difference. First operand has 208 places, 279 transitions, 3081 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:49:34,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 309 transitions, 3937 flow [2024-06-21 20:49:34,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 309 transitions, 3839 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:34,809 INFO L231 Difference]: Finished difference. Result has 211 places, 284 transitions, 3215 flow [2024-06-21 20:49:34,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3215, PETRI_PLACES=211, PETRI_TRANSITIONS=284} [2024-06-21 20:49:34,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 20:49:34,810 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 284 transitions, 3215 flow [2024-06-21 20:49:34,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:34,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:34,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:49:34,811 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)] === [2024-06-21 20:49:34,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:34,811 INFO L85 PathProgramCache]: Analyzing trace with hash -763279515, now seen corresponding path program 1 times [2024-06-21 20:49:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:34,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947662386] [2024-06-21 20:49:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:35,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:35,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947662386] [2024-06-21 20:49:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947662386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:35,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119255643] [2024-06-21 20:49:35,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:35,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:35,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:35,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:35,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:35,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:35,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 284 transitions, 3215 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:35,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:35,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:35,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:36,520 INFO L124 PetriNetUnfolderBase]: 2181/3490 cut-off events. [2024-06-21 20:49:36,521 INFO L125 PetriNetUnfolderBase]: For 270480/270483 co-relation queries the response was YES. [2024-06-21 20:49:36,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31441 conditions, 3490 events. 2181/3490 cut-off events. For 270480/270483 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19638 event pairs, 503 based on Foata normal form. 2/3487 useless extension candidates. Maximal degree in co-relation 31339. Up to 3140 conditions per place. [2024-06-21 20:49:36,561 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 38 changer transitions 0/310 dead transitions. [2024-06-21 20:49:36,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 310 transitions, 3989 flow [2024-06-21 20:49:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:49:36,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:49:36,562 INFO L175 Difference]: Start difference. First operand has 211 places, 284 transitions, 3215 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:49:36,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 310 transitions, 3989 flow [2024-06-21 20:49:36,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 310 transitions, 3795 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:36,867 INFO L231 Difference]: Finished difference. Result has 212 places, 288 transitions, 3218 flow [2024-06-21 20:49:36,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3218, PETRI_PLACES=212, PETRI_TRANSITIONS=288} [2024-06-21 20:49:36,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-21 20:49:36,868 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 288 transitions, 3218 flow [2024-06-21 20:49:36,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:36,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:36,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:36,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:49:36,869 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)] === [2024-06-21 20:49:36,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash 244114527, now seen corresponding path program 1 times [2024-06-21 20:49:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:36,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323756271] [2024-06-21 20:49:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:36,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:37,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:37,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323756271] [2024-06-21 20:49:37,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323756271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:37,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:37,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613163854] [2024-06-21 20:49:37,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:37,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:37,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 288 transitions, 3218 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:37,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:37,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:37,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:38,607 INFO L124 PetriNetUnfolderBase]: 2201/3519 cut-off events. [2024-06-21 20:49:38,607 INFO L125 PetriNetUnfolderBase]: For 282696/282699 co-relation queries the response was YES. [2024-06-21 20:49:38,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31971 conditions, 3519 events. 2201/3519 cut-off events. For 282696/282699 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19764 event pairs, 495 based on Foata normal form. 6/3521 useless extension candidates. Maximal degree in co-relation 31868. Up to 3223 conditions per place. [2024-06-21 20:49:38,645 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 279 selfloop transitions, 29 changer transitions 0/313 dead transitions. [2024-06-21 20:49:38,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 313 transitions, 4012 flow [2024-06-21 20:49:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:49:38,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:49:38,646 INFO L175 Difference]: Start difference. First operand has 212 places, 288 transitions, 3218 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:49:38,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 313 transitions, 4012 flow [2024-06-21 20:49:38,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 313 transitions, 3826 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:38,962 INFO L231 Difference]: Finished difference. Result has 213 places, 293 transitions, 3204 flow [2024-06-21 20:49:38,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3204, PETRI_PLACES=213, PETRI_TRANSITIONS=293} [2024-06-21 20:49:38,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-21 20:49:38,963 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 293 transitions, 3204 flow [2024-06-21 20:49:38,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:38,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:38,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:38,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:49:38,964 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)] === [2024-06-21 20:49:38,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash -585790689, now seen corresponding path program 2 times [2024-06-21 20:49:38,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:38,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140927427] [2024-06-21 20:49:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:38,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:39,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:39,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140927427] [2024-06-21 20:49:39,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140927427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:39,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:39,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:39,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113701414] [2024-06-21 20:49:39,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:39,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:39,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:39,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:39,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 293 transitions, 3204 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:39,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:39,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:39,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:40,478 INFO L124 PetriNetUnfolderBase]: 2211/3537 cut-off events. [2024-06-21 20:49:40,478 INFO L125 PetriNetUnfolderBase]: For 287865/287868 co-relation queries the response was YES. [2024-06-21 20:49:40,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32130 conditions, 3537 events. 2211/3537 cut-off events. For 287865/287868 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19975 event pairs, 495 based on Foata normal form. 4/3537 useless extension candidates. Maximal degree in co-relation 32026. Up to 3118 conditions per place. [2024-06-21 20:49:40,519 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 249 selfloop transitions, 61 changer transitions 0/315 dead transitions. [2024-06-21 20:49:40,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 315 transitions, 4096 flow [2024-06-21 20:49:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:49:40,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:49:40,520 INFO L175 Difference]: Start difference. First operand has 213 places, 293 transitions, 3204 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:49:40,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 315 transitions, 4096 flow [2024-06-21 20:49:40,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 315 transitions, 3986 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:40,833 INFO L231 Difference]: Finished difference. Result has 215 places, 297 transitions, 3308 flow [2024-06-21 20:49:40,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3308, PETRI_PLACES=215, PETRI_TRANSITIONS=297} [2024-06-21 20:49:40,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 20:49:40,833 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 297 transitions, 3308 flow [2024-06-21 20:49:40,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:40,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:40,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:40,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:49:40,834 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)] === [2024-06-21 20:49:40,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash -586027839, now seen corresponding path program 3 times [2024-06-21 20:49:40,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:40,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853871923] [2024-06-21 20:49:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:40,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:41,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:41,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853871923] [2024-06-21 20:49:41,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853871923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:41,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:41,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512161019] [2024-06-21 20:49:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:41,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:41,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:41,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 297 transitions, 3308 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:41,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:41,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:41,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:42,483 INFO L124 PetriNetUnfolderBase]: 2215/3541 cut-off events. [2024-06-21 20:49:42,483 INFO L125 PetriNetUnfolderBase]: For 296634/296637 co-relation queries the response was YES. [2024-06-21 20:49:42,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32272 conditions, 3541 events. 2215/3541 cut-off events. For 296634/296637 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19938 event pairs, 495 based on Foata normal form. 6/3543 useless extension candidates. Maximal degree in co-relation 32167. Up to 3192 conditions per place. [2024-06-21 20:49:42,523 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 273 selfloop transitions, 41 changer transitions 0/319 dead transitions. [2024-06-21 20:49:42,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 319 transitions, 4140 flow [2024-06-21 20:49:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:49:42,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:49:42,524 INFO L175 Difference]: Start difference. First operand has 215 places, 297 transitions, 3308 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:49:42,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 319 transitions, 4140 flow [2024-06-21 20:49:42,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 319 transitions, 4005 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:49:42,814 INFO L231 Difference]: Finished difference. Result has 218 places, 301 transitions, 3369 flow [2024-06-21 20:49:42,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3369, PETRI_PLACES=218, PETRI_TRANSITIONS=301} [2024-06-21 20:49:42,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 20:49:42,815 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 301 transitions, 3369 flow [2024-06-21 20:49:42,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:42,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:42,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:42,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:49:42,816 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)] === [2024-06-21 20:49:42,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash -586151157, now seen corresponding path program 3 times [2024-06-21 20:49:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:42,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367741812] [2024-06-21 20:49:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:42,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:43,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:43,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367741812] [2024-06-21 20:49:43,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367741812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:43,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:43,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:43,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329423047] [2024-06-21 20:49:43,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:43,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:43,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:43,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:43,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:43,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:43,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 301 transitions, 3369 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:43,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:43,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:43,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:44,584 INFO L124 PetriNetUnfolderBase]: 2259/3609 cut-off events. [2024-06-21 20:49:44,585 INFO L125 PetriNetUnfolderBase]: For 321876/321879 co-relation queries the response was YES. [2024-06-21 20:49:44,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32992 conditions, 3609 events. 2259/3609 cut-off events. For 321876/321879 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20376 event pairs, 497 based on Foata normal form. 14/3619 useless extension candidates. Maximal degree in co-relation 32886. Up to 3224 conditions per place. [2024-06-21 20:49:44,625 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 282 selfloop transitions, 39 changer transitions 0/326 dead transitions. [2024-06-21 20:49:44,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 326 transitions, 4283 flow [2024-06-21 20:49:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:49:44,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 20:49:44,626 INFO L175 Difference]: Start difference. First operand has 218 places, 301 transitions, 3369 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:49:44,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 326 transitions, 4283 flow [2024-06-21 20:49:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 326 transitions, 4137 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:44,950 INFO L231 Difference]: Finished difference. Result has 220 places, 303 transitions, 3391 flow [2024-06-21 20:49:44,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3391, PETRI_PLACES=220, PETRI_TRANSITIONS=303} [2024-06-21 20:49:44,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-21 20:49:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 303 transitions, 3391 flow [2024-06-21 20:49:44,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:44,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:44,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:44,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:49:44,951 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)] === [2024-06-21 20:49:44,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -586140245, now seen corresponding path program 2 times [2024-06-21 20:49:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:44,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562326341] [2024-06-21 20:49:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:45,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:45,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562326341] [2024-06-21 20:49:45,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562326341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:45,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:45,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:45,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217419948] [2024-06-21 20:49:45,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:45,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:45,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:46,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:46,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 303 transitions, 3391 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:46,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:46,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:46,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:46,873 INFO L124 PetriNetUnfolderBase]: 2289/3657 cut-off events. [2024-06-21 20:49:46,881 INFO L125 PetriNetUnfolderBase]: For 323366/323369 co-relation queries the response was YES. [2024-06-21 20:49:46,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33623 conditions, 3657 events. 2289/3657 cut-off events. For 323366/323369 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20714 event pairs, 499 based on Foata normal form. 8/3661 useless extension candidates. Maximal degree in co-relation 33516. Up to 3287 conditions per place. [2024-06-21 20:49:46,925 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 276 selfloop transitions, 47 changer transitions 0/328 dead transitions. [2024-06-21 20:49:46,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 328 transitions, 4317 flow [2024-06-21 20:49:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:49:46,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 20:49:46,927 INFO L175 Difference]: Start difference. First operand has 220 places, 303 transitions, 3391 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:49:46,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 328 transitions, 4317 flow [2024-06-21 20:49:47,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 328 transitions, 4191 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:47,280 INFO L231 Difference]: Finished difference. Result has 223 places, 308 transitions, 3537 flow [2024-06-21 20:49:47,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3537, PETRI_PLACES=223, PETRI_TRANSITIONS=308} [2024-06-21 20:49:47,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-21 20:49:47,281 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 308 transitions, 3537 flow [2024-06-21 20:49:47,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:47,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:47,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:47,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:49:47,282 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)] === [2024-06-21 20:49:47,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:47,282 INFO L85 PathProgramCache]: Analyzing trace with hash -585782195, now seen corresponding path program 3 times [2024-06-21 20:49:47,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:47,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874243889] [2024-06-21 20:49:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:47,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:48,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874243889] [2024-06-21 20:49:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874243889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:48,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:48,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:48,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849042827] [2024-06-21 20:49:48,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:48,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:48,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:48,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:48,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 308 transitions, 3537 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:48,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:48,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:48,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:49,299 INFO L124 PetriNetUnfolderBase]: 2348/3747 cut-off events. [2024-06-21 20:49:49,299 INFO L125 PetriNetUnfolderBase]: For 342831/342834 co-relation queries the response was YES. [2024-06-21 20:49:49,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35447 conditions, 3747 events. 2348/3747 cut-off events. For 342831/342834 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21290 event pairs, 496 based on Foata normal form. 5/3748 useless extension candidates. Maximal degree in co-relation 35339. Up to 3225 conditions per place. [2024-06-21 20:49:49,343 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 266 selfloop transitions, 77 changer transitions 0/348 dead transitions. [2024-06-21 20:49:49,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 348 transitions, 5092 flow [2024-06-21 20:49:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:49:49,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 20:49:49,345 INFO L175 Difference]: Start difference. First operand has 223 places, 308 transitions, 3537 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:49:49,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 348 transitions, 5092 flow [2024-06-21 20:49:49,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 348 transitions, 4726 flow, removed 137 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:49,742 INFO L231 Difference]: Finished difference. Result has 226 places, 325 transitions, 3847 flow [2024-06-21 20:49:49,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3847, PETRI_PLACES=226, PETRI_TRANSITIONS=325} [2024-06-21 20:49:49,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 20:49:49,743 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 325 transitions, 3847 flow [2024-06-21 20:49:49,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:49,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:49,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:49,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:49:49,743 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)] === [2024-06-21 20:49:49,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:49,744 INFO L85 PathProgramCache]: Analyzing trace with hash -585794285, now seen corresponding path program 4 times [2024-06-21 20:49:49,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:49,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200097636] [2024-06-21 20:49:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:49,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200097636] [2024-06-21 20:49:50,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200097636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:50,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:50,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:50,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604327212] [2024-06-21 20:49:50,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:50,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:50,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:50,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:50,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:50,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:50,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 325 transitions, 3847 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:50,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:50,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:50,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:51,610 INFO L124 PetriNetUnfolderBase]: 2434/3875 cut-off events. [2024-06-21 20:49:51,611 INFO L125 PetriNetUnfolderBase]: For 382070/382073 co-relation queries the response was YES. [2024-06-21 20:49:51,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38245 conditions, 3875 events. 2434/3875 cut-off events. For 382070/382073 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22061 event pairs, 505 based on Foata normal form. 8/3879 useless extension candidates. Maximal degree in co-relation 38135. Up to 3260 conditions per place. [2024-06-21 20:49:51,655 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 258 selfloop transitions, 101 changer transitions 0/364 dead transitions. [2024-06-21 20:49:51,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 364 transitions, 5535 flow [2024-06-21 20:49:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:49:51,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 20:49:51,657 INFO L175 Difference]: Start difference. First operand has 226 places, 325 transitions, 3847 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:49:51,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 364 transitions, 5535 flow [2024-06-21 20:49:52,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 364 transitions, 5236 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-21 20:49:52,121 INFO L231 Difference]: Finished difference. Result has 231 places, 344 transitions, 4489 flow [2024-06-21 20:49:52,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3580, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4489, PETRI_PLACES=231, PETRI_TRANSITIONS=344} [2024-06-21 20:49:52,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-21 20:49:52,122 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 344 transitions, 4489 flow [2024-06-21 20:49:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:52,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:52,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:52,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:49:52,123 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)] === [2024-06-21 20:49:52,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1257702391, now seen corresponding path program 2 times [2024-06-21 20:49:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:52,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001472339] [2024-06-21 20:49:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:52,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:52,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:52,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001472339] [2024-06-21 20:49:52,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001472339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:52,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:52,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:52,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930789861] [2024-06-21 20:49:52,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:52,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:52,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:53,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:53,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 344 transitions, 4489 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:53,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:53,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:53,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:53,900 INFO L124 PetriNetUnfolderBase]: 2439/3874 cut-off events. [2024-06-21 20:49:53,900 INFO L125 PetriNetUnfolderBase]: For 388870/388873 co-relation queries the response was YES. [2024-06-21 20:49:53,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39257 conditions, 3874 events. 2439/3874 cut-off events. For 388870/388873 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21965 event pairs, 529 based on Foata normal form. 1/3864 useless extension candidates. Maximal degree in co-relation 39144. Up to 3510 conditions per place. [2024-06-21 20:49:53,948 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 323 selfloop transitions, 39 changer transitions 0/367 dead transitions. [2024-06-21 20:49:53,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 367 transitions, 5375 flow [2024-06-21 20:49:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:49:53,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:49:53,950 INFO L175 Difference]: Start difference. First operand has 231 places, 344 transitions, 4489 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:49:53,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 367 transitions, 5375 flow [2024-06-21 20:49:54,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 367 transitions, 5012 flow, removed 165 selfloop flow, removed 4 redundant places. [2024-06-21 20:49:54,457 INFO L231 Difference]: Finished difference. Result has 235 places, 347 transitions, 4326 flow [2024-06-21 20:49:54,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4326, PETRI_PLACES=235, PETRI_TRANSITIONS=347} [2024-06-21 20:49:54,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 20:49:54,457 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 347 transitions, 4326 flow [2024-06-21 20:49:54,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:54,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:54,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:54,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:49:54,458 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)] === [2024-06-21 20:49:54,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash 611625619, now seen corresponding path program 4 times [2024-06-21 20:49:54,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:54,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658463672] [2024-06-21 20:49:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:55,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:55,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658463672] [2024-06-21 20:49:55,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658463672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:55,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:55,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:55,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274260478] [2024-06-21 20:49:55,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:55,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:55,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:55,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:55,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:55,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:55,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 347 transitions, 4326 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:55,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:55,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:55,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:56,207 INFO L124 PetriNetUnfolderBase]: 2421/3850 cut-off events. [2024-06-21 20:49:56,208 INFO L125 PetriNetUnfolderBase]: For 388450/388450 co-relation queries the response was YES. [2024-06-21 20:49:56,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38391 conditions, 3850 events. 2421/3850 cut-off events. For 388450/388450 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21871 event pairs, 521 based on Foata normal form. 2/3845 useless extension candidates. Maximal degree in co-relation 38277. Up to 3548 conditions per place. [2024-06-21 20:49:56,253 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 333 selfloop transitions, 27 changer transitions 0/365 dead transitions. [2024-06-21 20:49:56,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 365 transitions, 5094 flow [2024-06-21 20:49:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:49:56,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:49:56,254 INFO L175 Difference]: Start difference. First operand has 235 places, 347 transitions, 4326 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:49:56,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 365 transitions, 5094 flow [2024-06-21 20:49:56,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 365 transitions, 4882 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:56,797 INFO L231 Difference]: Finished difference. Result has 237 places, 347 transitions, 4175 flow [2024-06-21 20:49:56,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4114, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4175, PETRI_PLACES=237, PETRI_TRANSITIONS=347} [2024-06-21 20:49:56,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-21 20:49:56,797 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 347 transitions, 4175 flow [2024-06-21 20:49:56,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:56,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:56,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:56,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:49:56,798 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)] === [2024-06-21 20:49:56,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:56,798 INFO L85 PathProgramCache]: Analyzing trace with hash 871293895, now seen corresponding path program 3 times [2024-06-21 20:49:56,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:56,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039275338] [2024-06-21 20:49:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:56,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:57,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:57,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039275338] [2024-06-21 20:49:57,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039275338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:57,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:57,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:57,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215569251] [2024-06-21 20:49:57,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:57,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:57,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:57,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:57,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 347 transitions, 4175 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:57,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:57,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:57,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:58,477 INFO L124 PetriNetUnfolderBase]: 2426/3853 cut-off events. [2024-06-21 20:49:58,478 INFO L125 PetriNetUnfolderBase]: For 395191/395191 co-relation queries the response was YES. [2024-06-21 20:49:58,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38470 conditions, 3853 events. 2426/3853 cut-off events. For 395191/395191 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21880 event pairs, 529 based on Foata normal form. 1/3844 useless extension candidates. Maximal degree in co-relation 38355. Up to 3491 conditions per place. [2024-06-21 20:49:58,524 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 325 selfloop transitions, 40 changer transitions 0/370 dead transitions. [2024-06-21 20:49:58,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 370 transitions, 5073 flow [2024-06-21 20:49:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:49:58,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:49:58,525 INFO L175 Difference]: Start difference. First operand has 237 places, 347 transitions, 4175 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:49:58,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 370 transitions, 5073 flow [2024-06-21 20:49:58,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 370 transitions, 4916 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 20:49:58,999 INFO L231 Difference]: Finished difference. Result has 237 places, 350 transitions, 4226 flow [2024-06-21 20:49:59,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4018, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4226, PETRI_PLACES=237, PETRI_TRANSITIONS=350} [2024-06-21 20:49:59,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-21 20:49:59,000 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 350 transitions, 4226 flow [2024-06-21 20:49:59,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:59,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:59,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:59,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:49:59,001 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)] === [2024-06-21 20:49:59,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2099251645, now seen corresponding path program 4 times [2024-06-21 20:49:59,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:59,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203197546] [2024-06-21 20:49:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:59,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:59,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:59,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203197546] [2024-06-21 20:49:59,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203197546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:59,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:59,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:59,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926329307] [2024-06-21 20:49:59,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:59,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:59,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:00,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:00,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 350 transitions, 4226 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:00,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:00,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:00,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:00,839 INFO L124 PetriNetUnfolderBase]: 2423/3851 cut-off events. [2024-06-21 20:50:00,839 INFO L125 PetriNetUnfolderBase]: For 405244/405244 co-relation queries the response was YES. [2024-06-21 20:50:00,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38696 conditions, 3851 events. 2423/3851 cut-off events. For 405244/405244 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21763 event pairs, 493 based on Foata normal form. 1/3844 useless extension candidates. Maximal degree in co-relation 38580. Up to 3472 conditions per place. [2024-06-21 20:50:00,883 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 312 selfloop transitions, 55 changer transitions 0/372 dead transitions. [2024-06-21 20:50:00,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 372 transitions, 5157 flow [2024-06-21 20:50:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:50:00,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:50:00,884 INFO L175 Difference]: Start difference. First operand has 237 places, 350 transitions, 4226 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:50:00,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 372 transitions, 5157 flow [2024-06-21 20:50:01,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 372 transitions, 4969 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:01,380 INFO L231 Difference]: Finished difference. Result has 241 places, 355 transitions, 4312 flow [2024-06-21 20:50:01,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4312, PETRI_PLACES=241, PETRI_TRANSITIONS=355} [2024-06-21 20:50:01,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 20:50:01,381 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 355 transitions, 4312 flow [2024-06-21 20:50:01,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:01,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:01,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:01,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:50:01,381 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)] === [2024-06-21 20:50:01,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:01,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1983781729, now seen corresponding path program 5 times [2024-06-21 20:50:01,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:01,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942981764] [2024-06-21 20:50:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:01,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:02,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:02,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942981764] [2024-06-21 20:50:02,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942981764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:02,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:02,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:02,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230331242] [2024-06-21 20:50:02,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:02,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:02,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:02,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:02,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 355 transitions, 4312 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:02,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:02,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:02,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:03,091 INFO L124 PetriNetUnfolderBase]: 2449/3887 cut-off events. [2024-06-21 20:50:03,091 INFO L125 PetriNetUnfolderBase]: For 424541/424541 co-relation queries the response was YES. [2024-06-21 20:50:03,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39557 conditions, 3887 events. 2449/3887 cut-off events. For 424541/424541 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22051 event pairs, 479 based on Foata normal form. 2/3882 useless extension candidates. Maximal degree in co-relation 39439. Up to 3529 conditions per place. [2024-06-21 20:50:03,137 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 322 selfloop transitions, 53 changer transitions 0/380 dead transitions. [2024-06-21 20:50:03,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 380 transitions, 5456 flow [2024-06-21 20:50:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:50:03,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:50:03,138 INFO L175 Difference]: Start difference. First operand has 241 places, 355 transitions, 4312 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:50:03,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 380 transitions, 5456 flow [2024-06-21 20:50:03,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 380 transitions, 5256 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:03,610 INFO L231 Difference]: Finished difference. Result has 245 places, 364 transitions, 4446 flow [2024-06-21 20:50:03,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4112, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4446, PETRI_PLACES=245, PETRI_TRANSITIONS=364} [2024-06-21 20:50:03,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-21 20:50:03,611 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 364 transitions, 4446 flow [2024-06-21 20:50:03,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:03,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:03,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:03,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:50:03,612 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)] === [2024-06-21 20:50:03,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1149785831, now seen corresponding path program 6 times [2024-06-21 20:50:03,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:03,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815932429] [2024-06-21 20:50:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:03,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:04,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:04,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815932429] [2024-06-21 20:50:04,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815932429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:04,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:04,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:04,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213924750] [2024-06-21 20:50:04,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:04,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:04,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:04,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:04,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 364 transitions, 4446 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:04,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:04,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:04,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:05,500 INFO L124 PetriNetUnfolderBase]: 2443/3883 cut-off events. [2024-06-21 20:50:05,500 INFO L125 PetriNetUnfolderBase]: For 427793/427793 co-relation queries the response was YES. [2024-06-21 20:50:05,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39542 conditions, 3883 events. 2443/3883 cut-off events. For 427793/427793 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22073 event pairs, 481 based on Foata normal form. 2/3878 useless extension candidates. Maximal degree in co-relation 39421. Up to 3553 conditions per place. [2024-06-21 20:50:05,545 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 338 selfloop transitions, 37 changer transitions 0/380 dead transitions. [2024-06-21 20:50:05,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 380 transitions, 5308 flow [2024-06-21 20:50:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:50:05,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:50:05,547 INFO L175 Difference]: Start difference. First operand has 245 places, 364 transitions, 4446 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:50:05,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 380 transitions, 5308 flow [2024-06-21 20:50:06,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 380 transitions, 5108 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:06,078 INFO L231 Difference]: Finished difference. Result has 248 places, 364 transitions, 4327 flow [2024-06-21 20:50:06,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4246, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4327, PETRI_PLACES=248, PETRI_TRANSITIONS=364} [2024-06-21 20:50:06,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-21 20:50:06,079 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 364 transitions, 4327 flow [2024-06-21 20:50:06,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:06,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:06,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:06,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:50:06,080 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)] === [2024-06-21 20:50:06,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash 963785597, now seen corresponding path program 7 times [2024-06-21 20:50:06,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:06,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884441089] [2024-06-21 20:50:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:07,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884441089] [2024-06-21 20:50:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884441089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:07,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:07,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:07,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493455311] [2024-06-21 20:50:07,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:07,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:07,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:07,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 364 transitions, 4327 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:07,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:07,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:07,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:07,961 INFO L124 PetriNetUnfolderBase]: 2472/3920 cut-off events. [2024-06-21 20:50:07,962 INFO L125 PetriNetUnfolderBase]: For 444311/444314 co-relation queries the response was YES. [2024-06-21 20:50:07,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40103 conditions, 3920 events. 2472/3920 cut-off events. For 444311/444314 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22221 event pairs, 499 based on Foata normal form. 3/3915 useless extension candidates. Maximal degree in co-relation 39981. Up to 3291 conditions per place. [2024-06-21 20:50:08,009 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 251 selfloop transitions, 132 changer transitions 0/388 dead transitions. [2024-06-21 20:50:08,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 388 transitions, 5670 flow [2024-06-21 20:50:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:50:08,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:50:08,011 INFO L175 Difference]: Start difference. First operand has 248 places, 364 transitions, 4327 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:50:08,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 388 transitions, 5670 flow [2024-06-21 20:50:08,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 388 transitions, 5597 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:08,546 INFO L231 Difference]: Finished difference. Result has 251 places, 375 transitions, 4784 flow [2024-06-21 20:50:08,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4784, PETRI_PLACES=251, PETRI_TRANSITIONS=375} [2024-06-21 20:50:08,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-21 20:50:08,547 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 375 transitions, 4784 flow [2024-06-21 20:50:08,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:08,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:08,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:08,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:50:08,547 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)] === [2024-06-21 20:50:08,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:08,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1137992223, now seen corresponding path program 8 times [2024-06-21 20:50:08,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:08,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572758369] [2024-06-21 20:50:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:08,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:09,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:09,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572758369] [2024-06-21 20:50:09,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572758369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:09,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:09,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:09,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157535675] [2024-06-21 20:50:09,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:09,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:09,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:09,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:09,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:09,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:09,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 375 transitions, 4784 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:09,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:09,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:09,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:10,484 INFO L124 PetriNetUnfolderBase]: 2466/3922 cut-off events. [2024-06-21 20:50:10,485 INFO L125 PetriNetUnfolderBase]: For 450761/450764 co-relation queries the response was YES. [2024-06-21 20:50:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40475 conditions, 3922 events. 2466/3922 cut-off events. For 450761/450764 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22329 event pairs, 503 based on Foata normal form. 4/3918 useless extension candidates. Maximal degree in co-relation 40351. Up to 3286 conditions per place. [2024-06-21 20:50:10,533 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 259 selfloop transitions, 124 changer transitions 0/388 dead transitions. [2024-06-21 20:50:10,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 388 transitions, 5900 flow [2024-06-21 20:50:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:50:10,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:50:10,534 INFO L175 Difference]: Start difference. First operand has 251 places, 375 transitions, 4784 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:50:10,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 388 transitions, 5900 flow [2024-06-21 20:50:11,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 388 transitions, 5681 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 20:50:11,215 INFO L231 Difference]: Finished difference. Result has 255 places, 375 transitions, 4821 flow [2024-06-21 20:50:11,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4821, PETRI_PLACES=255, PETRI_TRANSITIONS=375} [2024-06-21 20:50:11,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-21 20:50:11,216 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 375 transitions, 4821 flow [2024-06-21 20:50:11,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:11,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:11,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:11,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:50:11,217 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)] === [2024-06-21 20:50:11,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:11,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1818142595, now seen corresponding path program 9 times [2024-06-21 20:50:11,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:11,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899065604] [2024-06-21 20:50:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:11,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:12,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:12,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899065604] [2024-06-21 20:50:12,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899065604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:12,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:12,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:12,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179981420] [2024-06-21 20:50:12,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:12,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:12,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:12,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:12,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:12,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 375 transitions, 4821 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:12,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:12,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:12,935 INFO L124 PetriNetUnfolderBase]: 2456/3898 cut-off events. [2024-06-21 20:50:12,936 INFO L125 PetriNetUnfolderBase]: For 457847/457850 co-relation queries the response was YES. [2024-06-21 20:50:12,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40368 conditions, 3898 events. 2456/3898 cut-off events. For 457847/457850 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22072 event pairs, 499 based on Foata normal form. 4/3894 useless extension candidates. Maximal degree in co-relation 40243. Up to 3437 conditions per place. [2024-06-21 20:50:12,985 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 311 selfloop transitions, 73 changer transitions 0/389 dead transitions. [2024-06-21 20:50:12,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 389 transitions, 5839 flow [2024-06-21 20:50:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:50:12,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:50:12,987 INFO L175 Difference]: Start difference. First operand has 255 places, 375 transitions, 4821 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:50:12,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 389 transitions, 5839 flow [2024-06-21 20:50:13,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 389 transitions, 5521 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:13,686 INFO L231 Difference]: Finished difference. Result has 258 places, 375 transitions, 4656 flow [2024-06-21 20:50:13,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4656, PETRI_PLACES=258, PETRI_TRANSITIONS=375} [2024-06-21 20:50:13,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-21 20:50:13,686 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 375 transitions, 4656 flow [2024-06-21 20:50:13,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:13,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:13,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:13,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:50:13,687 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)] === [2024-06-21 20:50:13,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash 735468737, now seen corresponding path program 10 times [2024-06-21 20:50:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:13,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849342334] [2024-06-21 20:50:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:13,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:14,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849342334] [2024-06-21 20:50:14,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849342334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:14,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:14,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723191134] [2024-06-21 20:50:14,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:14,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:14,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:14,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 375 transitions, 4656 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:14,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:14,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:14,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:15,460 INFO L124 PetriNetUnfolderBase]: 2466/3912 cut-off events. [2024-06-21 20:50:15,461 INFO L125 PetriNetUnfolderBase]: For 467811/467814 co-relation queries the response was YES. [2024-06-21 20:50:15,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40412 conditions, 3912 events. 2466/3912 cut-off events. For 467811/467814 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22154 event pairs, 497 based on Foata normal form. 4/3908 useless extension candidates. Maximal degree in co-relation 40286. Up to 3489 conditions per place. [2024-06-21 20:50:15,509 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 328 selfloop transitions, 60 changer transitions 0/393 dead transitions. [2024-06-21 20:50:15,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 393 transitions, 5685 flow [2024-06-21 20:50:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:50:15,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:50:15,511 INFO L175 Difference]: Start difference. First operand has 258 places, 375 transitions, 4656 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:50:15,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 393 transitions, 5685 flow [2024-06-21 20:50:16,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 393 transitions, 5329 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-21 20:50:16,309 INFO L231 Difference]: Finished difference. Result has 256 places, 379 transitions, 4546 flow [2024-06-21 20:50:16,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4546, PETRI_PLACES=256, PETRI_TRANSITIONS=379} [2024-06-21 20:50:16,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-21 20:50:16,310 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 379 transitions, 4546 flow [2024-06-21 20:50:16,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:16,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:16,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:16,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:50:16,311 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)] === [2024-06-21 20:50:16,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash 604362109, now seen corresponding path program 11 times [2024-06-21 20:50:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:16,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843570780] [2024-06-21 20:50:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:16,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:17,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843570780] [2024-06-21 20:50:17,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843570780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:17,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:17,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:17,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56067692] [2024-06-21 20:50:17,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:17,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 379 transitions, 4546 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:17,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:18,082 INFO L124 PetriNetUnfolderBase]: 2460/3906 cut-off events. [2024-06-21 20:50:18,083 INFO L125 PetriNetUnfolderBase]: For 470701/470704 co-relation queries the response was YES. [2024-06-21 20:50:18,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39995 conditions, 3906 events. 2460/3906 cut-off events. For 470701/470704 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22167 event pairs, 493 based on Foata normal form. 4/3902 useless extension candidates. Maximal degree in co-relation 39870. Up to 3418 conditions per place. [2024-06-21 20:50:18,135 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 312 selfloop transitions, 75 changer transitions 0/392 dead transitions. [2024-06-21 20:50:18,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 392 transitions, 5570 flow [2024-06-21 20:50:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:50:18,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:50:18,136 INFO L175 Difference]: Start difference. First operand has 256 places, 379 transitions, 4546 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:50:18,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 392 transitions, 5570 flow [2024-06-21 20:50:18,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 392 transitions, 5355 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:18,906 INFO L231 Difference]: Finished difference. Result has 258 places, 379 transitions, 4490 flow [2024-06-21 20:50:18,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4490, PETRI_PLACES=258, PETRI_TRANSITIONS=379} [2024-06-21 20:50:18,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-21 20:50:18,907 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 379 transitions, 4490 flow [2024-06-21 20:50:18,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:18,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:18,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:18,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:50:18,907 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)] === [2024-06-21 20:50:18,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash 558337217, now seen corresponding path program 12 times [2024-06-21 20:50:18,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:18,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856441707] [2024-06-21 20:50:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:18,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:19,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:19,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856441707] [2024-06-21 20:50:19,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856441707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:19,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:19,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:19,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343442454] [2024-06-21 20:50:19,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:19,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:19,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:19,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:19,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:19,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:19,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 379 transitions, 4490 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:19,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:19,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:19,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:20,684 INFO L124 PetriNetUnfolderBase]: 2444/3878 cut-off events. [2024-06-21 20:50:20,684 INFO L125 PetriNetUnfolderBase]: For 475901/475904 co-relation queries the response was YES. [2024-06-21 20:50:20,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39578 conditions, 3878 events. 2444/3878 cut-off events. For 475901/475904 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21909 event pairs, 493 based on Foata normal form. 6/3876 useless extension candidates. Maximal degree in co-relation 39452. Up to 3453 conditions per place. [2024-06-21 20:50:20,732 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 330 selfloop transitions, 57 changer transitions 0/392 dead transitions. [2024-06-21 20:50:20,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 392 transitions, 5402 flow [2024-06-21 20:50:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:50:20,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:50:20,733 INFO L175 Difference]: Start difference. First operand has 258 places, 379 transitions, 4490 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:50:20,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 392 transitions, 5402 flow [2024-06-21 20:50:21,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 392 transitions, 5219 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:21,479 INFO L231 Difference]: Finished difference. Result has 261 places, 379 transitions, 4429 flow [2024-06-21 20:50:21,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4307, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4429, PETRI_PLACES=261, PETRI_TRANSITIONS=379} [2024-06-21 20:50:21,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 20:50:21,480 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 379 transitions, 4429 flow [2024-06-21 20:50:21,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:21,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:21,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:21,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:50:21,480 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)] === [2024-06-21 20:50:21,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash 604001641, now seen corresponding path program 4 times [2024-06-21 20:50:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:21,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466764247] [2024-06-21 20:50:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:22,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:22,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466764247] [2024-06-21 20:50:22,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466764247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:22,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25315181] [2024-06-21 20:50:22,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:22,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:22,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:22,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 379 transitions, 4429 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:22,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:22,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:22,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:23,281 INFO L124 PetriNetUnfolderBase]: 2475/3927 cut-off events. [2024-06-21 20:50:23,282 INFO L125 PetriNetUnfolderBase]: For 504900/504903 co-relation queries the response was YES. [2024-06-21 20:50:23,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39925 conditions, 3927 events. 2475/3927 cut-off events. For 504900/504903 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22270 event pairs, 496 based on Foata normal form. 14/3933 useless extension candidates. Maximal degree in co-relation 39798. Up to 3466 conditions per place. [2024-06-21 20:50:23,330 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 338 selfloop transitions, 56 changer transitions 0/399 dead transitions. [2024-06-21 20:50:23,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 399 transitions, 5561 flow [2024-06-21 20:50:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:50:23,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:50:23,331 INFO L175 Difference]: Start difference. First operand has 261 places, 379 transitions, 4429 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:50:23,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 399 transitions, 5561 flow [2024-06-21 20:50:24,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 399 transitions, 5388 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:50:24,121 INFO L231 Difference]: Finished difference. Result has 261 places, 381 transitions, 4474 flow [2024-06-21 20:50:24,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4474, PETRI_PLACES=261, PETRI_TRANSITIONS=381} [2024-06-21 20:50:24,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 20:50:24,122 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 381 transitions, 4474 flow [2024-06-21 20:50:24,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:24,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:24,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:50:24,122 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)] === [2024-06-21 20:50:24,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:24,123 INFO L85 PathProgramCache]: Analyzing trace with hash 41915917, now seen corresponding path program 5 times [2024-06-21 20:50:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:24,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125789309] [2024-06-21 20:50:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:24,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:25,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:25,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125789309] [2024-06-21 20:50:25,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125789309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:25,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:25,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:25,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846037798] [2024-06-21 20:50:25,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:25,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:25,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:25,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:25,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:25,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 381 transitions, 4474 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:25,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:25,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:25,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:26,131 INFO L124 PetriNetUnfolderBase]: 2633/4159 cut-off events. [2024-06-21 20:50:26,131 INFO L125 PetriNetUnfolderBase]: For 561212/561215 co-relation queries the response was YES. [2024-06-21 20:50:26,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44488 conditions, 4159 events. 2633/4159 cut-off events. For 561212/561215 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23667 event pairs, 506 based on Foata normal form. 8/4159 useless extension candidates. Maximal degree in co-relation 44360. Up to 3527 conditions per place. [2024-06-21 20:50:26,185 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 321 selfloop transitions, 89 changer transitions 0/415 dead transitions. [2024-06-21 20:50:26,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 415 transitions, 6388 flow [2024-06-21 20:50:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:50:26,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:50:26,187 INFO L175 Difference]: Start difference. First operand has 261 places, 381 transitions, 4474 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:50:26,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 415 transitions, 6388 flow [2024-06-21 20:50:27,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 415 transitions, 6224 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:27,106 INFO L231 Difference]: Finished difference. Result has 266 places, 396 transitions, 5137 flow [2024-06-21 20:50:27,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4310, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5137, PETRI_PLACES=266, PETRI_TRANSITIONS=396} [2024-06-21 20:50:27,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-21 20:50:27,107 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 396 transitions, 5137 flow [2024-06-21 20:50:27,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:27,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:27,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:27,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:50:27,108 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)] === [2024-06-21 20:50:27,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash 972365405, now seen corresponding path program 1 times [2024-06-21 20:50:27,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:27,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982396195] [2024-06-21 20:50:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:27,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:28,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:28,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982396195] [2024-06-21 20:50:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982396195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:28,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:28,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:28,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461968599] [2024-06-21 20:50:28,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:28,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:28,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:28,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 396 transitions, 5137 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:28,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:28,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:28,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:29,557 INFO L124 PetriNetUnfolderBase]: 2638/4166 cut-off events. [2024-06-21 20:50:29,557 INFO L125 PetriNetUnfolderBase]: For 571314/571314 co-relation queries the response was YES. [2024-06-21 20:50:29,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45870 conditions, 4166 events. 2638/4166 cut-off events. For 571314/571314 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23682 event pairs, 489 based on Foata normal form. 1/4164 useless extension candidates. Maximal degree in co-relation 45739. Up to 3927 conditions per place. [2024-06-21 20:50:29,613 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 382 selfloop transitions, 24 changer transitions 0/411 dead transitions. [2024-06-21 20:50:29,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 411 transitions, 6125 flow [2024-06-21 20:50:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:50:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:50:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 20:50:29,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 20:50:29,614 INFO L175 Difference]: Start difference. First operand has 266 places, 396 transitions, 5137 flow. Second operand 10 states and 160 transitions. [2024-06-21 20:50:29,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 411 transitions, 6125 flow [2024-06-21 20:50:30,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 411 transitions, 5802 flow, removed 132 selfloop flow, removed 4 redundant places. [2024-06-21 20:50:30,554 INFO L231 Difference]: Finished difference. Result has 272 places, 399 transitions, 5023 flow [2024-06-21 20:50:30,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5023, PETRI_PLACES=272, PETRI_TRANSITIONS=399} [2024-06-21 20:50:30,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 20:50:30,555 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 399 transitions, 5023 flow [2024-06-21 20:50:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:30,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:30,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:30,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:50:30,555 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)] === [2024-06-21 20:50:30,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 558224811, now seen corresponding path program 6 times [2024-06-21 20:50:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:30,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135353470] [2024-06-21 20:50:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:31,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:31,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135353470] [2024-06-21 20:50:31,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135353470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:31,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:31,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706829648] [2024-06-21 20:50:31,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:31,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:31,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:31,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 399 transitions, 5023 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:31,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:31,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:31,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:32,739 INFO L124 PetriNetUnfolderBase]: 2645/4177 cut-off events. [2024-06-21 20:50:32,739 INFO L125 PetriNetUnfolderBase]: For 579106/579112 co-relation queries the response was YES. [2024-06-21 20:50:32,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45383 conditions, 4177 events. 2645/4177 cut-off events. For 579106/579112 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23714 event pairs, 511 based on Foata normal form. 5/4173 useless extension candidates. Maximal degree in co-relation 45250. Up to 3731 conditions per place. [2024-06-21 20:50:32,792 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 349 selfloop transitions, 64 changer transitions 0/418 dead transitions. [2024-06-21 20:50:32,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 418 transitions, 6186 flow [2024-06-21 20:50:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:50:32,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:50:32,793 INFO L175 Difference]: Start difference. First operand has 272 places, 399 transitions, 5023 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:50:32,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 418 transitions, 6186 flow [2024-06-21 20:50:33,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 418 transitions, 5991 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-21 20:50:33,637 INFO L231 Difference]: Finished difference. Result has 273 places, 404 transitions, 5159 flow [2024-06-21 20:50:33,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5159, PETRI_PLACES=273, PETRI_TRANSITIONS=404} [2024-06-21 20:50:33,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-21 20:50:33,638 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 404 transitions, 5159 flow [2024-06-21 20:50:33,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:33,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:33,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:50:33,638 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)] === [2024-06-21 20:50:33,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 558582861, now seen corresponding path program 7 times [2024-06-21 20:50:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:33,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609368173] [2024-06-21 20:50:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:34,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609368173] [2024-06-21 20:50:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609368173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:34,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:34,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267506679] [2024-06-21 20:50:34,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:34,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:34,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:34,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:34,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:34,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:34,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 404 transitions, 5159 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:34,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:34,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:34,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:35,782 INFO L124 PetriNetUnfolderBase]: 2640/4176 cut-off events. [2024-06-21 20:50:35,782 INFO L125 PetriNetUnfolderBase]: For 576535/576538 co-relation queries the response was YES. [2024-06-21 20:50:35,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45316 conditions, 4176 events. 2640/4176 cut-off events. For 576535/576538 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23800 event pairs, 500 based on Foata normal form. 5/4173 useless extension candidates. Maximal degree in co-relation 45182. Up to 3612 conditions per place. [2024-06-21 20:50:35,838 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 337 selfloop transitions, 90 changer transitions 0/432 dead transitions. [2024-06-21 20:50:35,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 432 transitions, 6634 flow [2024-06-21 20:50:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:50:35,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 20:50:35,839 INFO L175 Difference]: Start difference. First operand has 273 places, 404 transitions, 5159 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:50:35,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 432 transitions, 6634 flow [2024-06-21 20:50:36,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 432 transitions, 6352 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:36,740 INFO L231 Difference]: Finished difference. Result has 276 places, 417 transitions, 5451 flow [2024-06-21 20:50:36,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5451, PETRI_PLACES=276, PETRI_TRANSITIONS=417} [2024-06-21 20:50:36,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 20:50:36,740 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 417 transitions, 5451 flow [2024-06-21 20:50:36,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:36,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:36,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:36,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:50:36,741 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)] === [2024-06-21 20:50:36,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash 958068081, now seen corresponding path program 8 times [2024-06-21 20:50:36,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:36,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352139036] [2024-06-21 20:50:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:36,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:37,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:37,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352139036] [2024-06-21 20:50:37,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352139036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:37,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:37,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:37,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975521620] [2024-06-21 20:50:37,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:37,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:37,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:37,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:37,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 417 transitions, 5451 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:37,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:37,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:37,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:38,719 INFO L124 PetriNetUnfolderBase]: 2679/4236 cut-off events. [2024-06-21 20:50:38,719 INFO L125 PetriNetUnfolderBase]: For 600341/600344 co-relation queries the response was YES. [2024-06-21 20:50:38,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46638 conditions, 4236 events. 2679/4236 cut-off events. For 600341/600344 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24166 event pairs, 499 based on Foata normal form. 5/4233 useless extension candidates. Maximal degree in co-relation 46502. Up to 3354 conditions per place. [2024-06-21 20:50:38,776 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 277 selfloop transitions, 171 changer transitions 0/453 dead transitions. [2024-06-21 20:50:38,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 453 transitions, 7561 flow [2024-06-21 20:50:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:50:38,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:50:38,777 INFO L175 Difference]: Start difference. First operand has 276 places, 417 transitions, 5451 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:50:38,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 453 transitions, 7561 flow [2024-06-21 20:50:39,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 453 transitions, 7301 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:39,650 INFO L231 Difference]: Finished difference. Result has 282 places, 435 transitions, 6354 flow [2024-06-21 20:50:39,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6354, PETRI_PLACES=282, PETRI_TRANSITIONS=435} [2024-06-21 20:50:39,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 20:50:39,651 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 435 transitions, 6354 flow [2024-06-21 20:50:39,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:39,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:39,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:39,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:50:39,652 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)] === [2024-06-21 20:50:39,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash 958080171, now seen corresponding path program 9 times [2024-06-21 20:50:39,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347537950] [2024-06-21 20:50:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:40,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:40,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347537950] [2024-06-21 20:50:40,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347537950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:40,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:40,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:40,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140676924] [2024-06-21 20:50:40,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:40,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:40,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:40,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 435 transitions, 6354 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:40,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:40,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:40,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:41,707 INFO L124 PetriNetUnfolderBase]: 2799/4416 cut-off events. [2024-06-21 20:50:41,707 INFO L125 PetriNetUnfolderBase]: For 680238/680241 co-relation queries the response was YES. [2024-06-21 20:50:41,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51747 conditions, 4416 events. 2799/4416 cut-off events. For 680238/680241 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25323 event pairs, 512 based on Foata normal form. 8/4416 useless extension candidates. Maximal degree in co-relation 51607. Up to 3215 conditions per place. [2024-06-21 20:50:41,769 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 251 selfloop transitions, 221 changer transitions 0/477 dead transitions. [2024-06-21 20:50:41,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 477 transitions, 9094 flow [2024-06-21 20:50:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:50:41,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 20:50:41,770 INFO L175 Difference]: Start difference. First operand has 282 places, 435 transitions, 6354 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:50:41,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 477 transitions, 9094 flow [2024-06-21 20:50:42,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 477 transitions, 8519 flow, removed 247 selfloop flow, removed 3 redundant places. [2024-06-21 20:50:42,896 INFO L231 Difference]: Finished difference. Result has 289 places, 457 transitions, 7235 flow [2024-06-21 20:50:42,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7235, PETRI_PLACES=289, PETRI_TRANSITIONS=457} [2024-06-21 20:50:42,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 20:50:42,897 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 457 transitions, 7235 flow [2024-06-21 20:50:42,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:42,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:42,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:42,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:50:42,897 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)] === [2024-06-21 20:50:42,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:42,898 INFO L85 PathProgramCache]: Analyzing trace with hash 521970897, now seen corresponding path program 10 times [2024-06-21 20:50:42,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:42,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455931776] [2024-06-21 20:50:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:42,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:44,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:44,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455931776] [2024-06-21 20:50:44,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455931776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:44,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:44,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:44,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842502229] [2024-06-21 20:50:44,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:44,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:44,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:44,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:44,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:44,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:44,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 457 transitions, 7235 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:44,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:44,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:44,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:45,289 INFO L124 PetriNetUnfolderBase]: 2794/4411 cut-off events. [2024-06-21 20:50:45,289 INFO L125 PetriNetUnfolderBase]: For 682597/682600 co-relation queries the response was YES. [2024-06-21 20:50:45,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51690 conditions, 4411 events. 2794/4411 cut-off events. For 682597/682600 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 25309 event pairs, 473 based on Foata normal form. 5/4412 useless extension candidates. Maximal degree in co-relation 51548. Up to 4070 conditions per place. [2024-06-21 20:50:45,347 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 414 selfloop transitions, 53 changer transitions 0/472 dead transitions. [2024-06-21 20:50:45,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 472 transitions, 8396 flow [2024-06-21 20:50:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:50:45,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:50:45,349 INFO L175 Difference]: Start difference. First operand has 289 places, 457 transitions, 7235 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:50:45,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 472 transitions, 8396 flow [2024-06-21 20:50:46,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 472 transitions, 7553 flow, removed 288 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:46,392 INFO L231 Difference]: Finished difference. Result has 294 places, 459 transitions, 6550 flow [2024-06-21 20:50:46,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6400, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6550, PETRI_PLACES=294, PETRI_TRANSITIONS=459} [2024-06-21 20:50:46,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-21 20:50:46,393 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 459 transitions, 6550 flow [2024-06-21 20:50:46,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:46,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:46,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:50:46,393 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)] === [2024-06-21 20:50:46,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 958080605, now seen corresponding path program 2 times [2024-06-21 20:50:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646967217] [2024-06-21 20:50:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:47,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:47,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646967217] [2024-06-21 20:50:47,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646967217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:47,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:47,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:47,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619189248] [2024-06-21 20:50:47,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:47,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:47,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:47,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:47,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:47,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:50:47,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 459 transitions, 6550 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:47,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:47,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:50:47,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:48,789 INFO L124 PetriNetUnfolderBase]: 2789/4413 cut-off events. [2024-06-21 20:50:48,790 INFO L125 PetriNetUnfolderBase]: For 666734/666740 co-relation queries the response was YES. [2024-06-21 20:50:48,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49863 conditions, 4413 events. 2789/4413 cut-off events. For 666734/666740 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25392 event pairs, 483 based on Foata normal form. 5/4414 useless extension candidates. Maximal degree in co-relation 49719. Up to 4105 conditions per place. [2024-06-21 20:50:48,854 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 42 changer transitions 0/474 dead transitions. [2024-06-21 20:50:48,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 474 transitions, 7664 flow [2024-06-21 20:50:48,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 20:50:48,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 20:50:48,856 INFO L175 Difference]: Start difference. First operand has 294 places, 459 transitions, 6550 flow. Second operand 9 states and 151 transitions. [2024-06-21 20:50:48,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 474 transitions, 7664 flow [2024-06-21 20:50:50,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 474 transitions, 7270 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 20:50:50,006 INFO L231 Difference]: Finished difference. Result has 295 places, 462 transitions, 6395 flow [2024-06-21 20:50:50,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6156, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6395, PETRI_PLACES=295, PETRI_TRANSITIONS=462} [2024-06-21 20:50:50,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-21 20:50:50,007 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 462 transitions, 6395 flow [2024-06-21 20:50:50,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:50,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:50,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:50,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:50:50,008 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)] === [2024-06-21 20:50:50,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2102099677, now seen corresponding path program 1 times [2024-06-21 20:50:50,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:50,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236850200] [2024-06-21 20:50:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:50,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:50,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:50,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236850200] [2024-06-21 20:50:50,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236850200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:50,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:50,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255432420] [2024-06-21 20:50:50,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:50,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:50,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:50,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:50:50,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 462 transitions, 6395 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:50,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:50,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:50:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:51,877 INFO L124 PetriNetUnfolderBase]: 2714/4332 cut-off events. [2024-06-21 20:50:51,877 INFO L125 PetriNetUnfolderBase]: For 690177/690177 co-relation queries the response was YES. [2024-06-21 20:50:51,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49134 conditions, 4332 events. 2714/4332 cut-off events. For 690177/690177 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25233 event pairs, 422 based on Foata normal form. 2/4331 useless extension candidates. Maximal degree in co-relation 48991. Up to 3870 conditions per place. [2024-06-21 20:50:51,938 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 16 changer transitions 0/485 dead transitions. [2024-06-21 20:50:51,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 485 transitions, 7423 flow [2024-06-21 20:50:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:50:51,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:50:51,939 INFO L175 Difference]: Start difference. First operand has 295 places, 462 transitions, 6395 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:50:51,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 485 transitions, 7423 flow [2024-06-21 20:50:53,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 485 transitions, 7213 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:53,047 INFO L231 Difference]: Finished difference. Result has 296 places, 464 transitions, 6294 flow [2024-06-21 20:50:53,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6294, PETRI_PLACES=296, PETRI_TRANSITIONS=464} [2024-06-21 20:50:53,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-21 20:50:53,048 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 464 transitions, 6294 flow [2024-06-21 20:50:53,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:53,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:53,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:53,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:50:53,049 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)] === [2024-06-21 20:50:53,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:53,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2099242717, now seen corresponding path program 2 times [2024-06-21 20:50:53,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:53,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937950256] [2024-06-21 20:50:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:53,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:53,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937950256] [2024-06-21 20:50:53,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937950256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:53,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:53,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705377435] [2024-06-21 20:50:53,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:53,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:53,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:50:53,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 464 transitions, 6294 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:53,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:53,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:50:53,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:54,961 INFO L124 PetriNetUnfolderBase]: 2722/4347 cut-off events. [2024-06-21 20:50:54,961 INFO L125 PetriNetUnfolderBase]: For 702763/702763 co-relation queries the response was YES. [2024-06-21 20:50:55,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49398 conditions, 4347 events. 2722/4347 cut-off events. For 702763/702763 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25394 event pairs, 457 based on Foata normal form. 2/4346 useless extension candidates. Maximal degree in co-relation 49254. Up to 3899 conditions per place. [2024-06-21 20:50:55,025 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 435 selfloop transitions, 17 changer transitions 0/483 dead transitions. [2024-06-21 20:50:55,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 483 transitions, 7312 flow [2024-06-21 20:50:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:50:55,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:50:55,027 INFO L175 Difference]: Start difference. First operand has 296 places, 464 transitions, 6294 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:50:55,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 483 transitions, 7312 flow [2024-06-21 20:50:56,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 483 transitions, 7219 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:56,353 INFO L231 Difference]: Finished difference. Result has 298 places, 466 transitions, 6316 flow [2024-06-21 20:50:56,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6201, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6316, PETRI_PLACES=298, PETRI_TRANSITIONS=466} [2024-06-21 20:50:56,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-21 20:50:56,354 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 466 transitions, 6316 flow [2024-06-21 20:50:56,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:56,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:56,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:50:56,354 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)] === [2024-06-21 20:50:56,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1983951547, now seen corresponding path program 3 times [2024-06-21 20:50:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:56,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344881973] [2024-06-21 20:50:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:56,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:57,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:57,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344881973] [2024-06-21 20:50:57,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344881973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:57,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:57,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988881169] [2024-06-21 20:50:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:57,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:57,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:57,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:57,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:57,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:50:57,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 466 transitions, 6316 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:57,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:57,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:50:57,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:58,335 INFO L124 PetriNetUnfolderBase]: 2730/4359 cut-off events. [2024-06-21 20:50:58,336 INFO L125 PetriNetUnfolderBase]: For 719235/719235 co-relation queries the response was YES. [2024-06-21 20:50:58,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49694 conditions, 4359 events. 2730/4359 cut-off events. For 719235/719235 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25440 event pairs, 453 based on Foata normal form. 2/4358 useless extension candidates. Maximal degree in co-relation 49549. Up to 3905 conditions per place. [2024-06-21 20:50:58,397 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 432 selfloop transitions, 22 changer transitions 0/485 dead transitions. [2024-06-21 20:50:58,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 485 transitions, 7368 flow [2024-06-21 20:50:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:50:58,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:50:58,398 INFO L175 Difference]: Start difference. First operand has 298 places, 466 transitions, 6316 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:50:58,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 485 transitions, 7368 flow [2024-06-21 20:50:59,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 485 transitions, 7269 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:59,458 INFO L231 Difference]: Finished difference. Result has 301 places, 471 transitions, 6390 flow [2024-06-21 20:50:59,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6390, PETRI_PLACES=301, PETRI_TRANSITIONS=471} [2024-06-21 20:50:59,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 20:50:59,459 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 471 transitions, 6390 flow [2024-06-21 20:50:59,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:59,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:59,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:59,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:50:59,459 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)] === [2024-06-21 20:50:59,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash 735714629, now seen corresponding path program 4 times [2024-06-21 20:50:59,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:59,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195460706] [2024-06-21 20:50:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:59,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:00,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:00,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195460706] [2024-06-21 20:51:00,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195460706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:00,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:00,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985368714] [2024-06-21 20:51:00,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:00,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:00,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:00,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:51:00,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 471 transitions, 6390 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:00,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:00,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:51:00,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:01,636 INFO L124 PetriNetUnfolderBase]: 2725/4353 cut-off events. [2024-06-21 20:51:01,636 INFO L125 PetriNetUnfolderBase]: For 717630/717633 co-relation queries the response was YES. [2024-06-21 20:51:01,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49587 conditions, 4353 events. 2725/4353 cut-off events. For 717630/717633 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25392 event pairs, 454 based on Foata normal form. 4/4353 useless extension candidates. Maximal degree in co-relation 49440. Up to 3901 conditions per place. [2024-06-21 20:51:01,705 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 432 selfloop transitions, 24 changer transitions 0/487 dead transitions. [2024-06-21 20:51:01,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 487 transitions, 7442 flow [2024-06-21 20:51:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:51:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:51:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:51:01,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 20:51:01,707 INFO L175 Difference]: Start difference. First operand has 301 places, 471 transitions, 6390 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:51:01,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 487 transitions, 7442 flow [2024-06-21 20:51:03,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 487 transitions, 7339 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 20:51:03,052 INFO L231 Difference]: Finished difference. Result has 306 places, 476 transitions, 6464 flow [2024-06-21 20:51:03,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6464, PETRI_PLACES=306, PETRI_TRANSITIONS=476} [2024-06-21 20:51:03,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 20:51:03,053 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 476 transitions, 6464 flow [2024-06-21 20:51:03,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:03,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:03,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:51:03,053 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)] === [2024-06-21 20:51:03,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1560084789, now seen corresponding path program 1 times [2024-06-21 20:51:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:03,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768210382] [2024-06-21 20:51:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:03,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:03,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768210382] [2024-06-21 20:51:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768210382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:03,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:03,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:03,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530446175] [2024-06-21 20:51:03,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:03,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:03,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:03,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 476 transitions, 6464 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:03,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:03,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:03,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:05,147 INFO L124 PetriNetUnfolderBase]: 2844/4492 cut-off events. [2024-06-21 20:51:05,148 INFO L125 PetriNetUnfolderBase]: For 759996/759999 co-relation queries the response was YES. [2024-06-21 20:51:05,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50674 conditions, 4492 events. 2844/4492 cut-off events. For 759996/759999 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25813 event pairs, 359 based on Foata normal form. 12/4500 useless extension candidates. Maximal degree in co-relation 50525. Up to 4028 conditions per place. [2024-06-21 20:51:05,213 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 30 changer transitions 0/512 dead transitions. [2024-06-21 20:51:05,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 512 transitions, 7839 flow [2024-06-21 20:51:05,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:51:05,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 20:51:05,215 INFO L175 Difference]: Start difference. First operand has 306 places, 476 transitions, 6464 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:51:05,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 512 transitions, 7839 flow [2024-06-21 20:51:06,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 512 transitions, 7714 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 20:51:06,435 INFO L231 Difference]: Finished difference. Result has 310 places, 479 transitions, 6547 flow [2024-06-21 20:51:06,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6339, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6547, PETRI_PLACES=310, PETRI_TRANSITIONS=479} [2024-06-21 20:51:06,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-21 20:51:06,436 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 479 transitions, 6547 flow [2024-06-21 20:51:06,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:06,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:06,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:06,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:51:06,437 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)] === [2024-06-21 20:51:06,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1294061079, now seen corresponding path program 2 times [2024-06-21 20:51:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:06,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738046046] [2024-06-21 20:51:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:06,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:07,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:07,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738046046] [2024-06-21 20:51:07,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738046046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:07,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:07,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723101134] [2024-06-21 20:51:07,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:07,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:07,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:07,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:07,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:07,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 479 transitions, 6547 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:07,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:07,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:07,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:08,634 INFO L124 PetriNetUnfolderBase]: 2888/4560 cut-off events. [2024-06-21 20:51:08,635 INFO L125 PetriNetUnfolderBase]: For 788652/788655 co-relation queries the response was YES. [2024-06-21 20:51:08,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51678 conditions, 4560 events. 2888/4560 cut-off events. For 788652/788655 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26273 event pairs, 494 based on Foata normal form. 14/4570 useless extension candidates. Maximal degree in co-relation 51528. Up to 4170 conditions per place. [2024-06-21 20:51:08,704 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 470 selfloop transitions, 34 changer transitions 0/509 dead transitions. [2024-06-21 20:51:08,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 509 transitions, 7842 flow [2024-06-21 20:51:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:51:08,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:51:08,705 INFO L175 Difference]: Start difference. First operand has 310 places, 479 transitions, 6547 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:51:08,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 509 transitions, 7842 flow [2024-06-21 20:51:09,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 509 transitions, 7688 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:09,928 INFO L231 Difference]: Finished difference. Result has 312 places, 482 transitions, 6616 flow [2024-06-21 20:51:09,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6393, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6616, PETRI_PLACES=312, PETRI_TRANSITIONS=482} [2024-06-21 20:51:09,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 20:51:09,929 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 482 transitions, 6616 flow [2024-06-21 20:51:09,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:09,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:09,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:09,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:51:09,929 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)] === [2024-06-21 20:51:09,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1550238801, now seen corresponding path program 3 times [2024-06-21 20:51:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:09,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830005165] [2024-06-21 20:51:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:09,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:10,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:10,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830005165] [2024-06-21 20:51:10,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830005165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:10,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:10,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:10,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642182786] [2024-06-21 20:51:10,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:10,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:10,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:10,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:10,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 482 transitions, 6616 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:10,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:10,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:10,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:12,158 INFO L124 PetriNetUnfolderBase]: 2932/4624 cut-off events. [2024-06-21 20:51:12,159 INFO L125 PetriNetUnfolderBase]: For 805752/805755 co-relation queries the response was YES. [2024-06-21 20:51:12,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52529 conditions, 4624 events. 2932/4624 cut-off events. For 805752/805755 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26701 event pairs, 490 based on Foata normal form. 14/4634 useless extension candidates. Maximal degree in co-relation 52378. Up to 4183 conditions per place. [2024-06-21 20:51:12,225 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 481 selfloop transitions, 31 changer transitions 0/517 dead transitions. [2024-06-21 20:51:12,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 517 transitions, 8063 flow [2024-06-21 20:51:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:51:12,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 20:51:12,227 INFO L175 Difference]: Start difference. First operand has 312 places, 482 transitions, 6616 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:51:12,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 517 transitions, 8063 flow [2024-06-21 20:51:13,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 517 transitions, 7896 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:13,505 INFO L231 Difference]: Finished difference. Result has 314 places, 485 transitions, 6671 flow [2024-06-21 20:51:13,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6449, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6671, PETRI_PLACES=314, PETRI_TRANSITIONS=485} [2024-06-21 20:51:13,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 20:51:13,506 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 485 transitions, 6671 flow [2024-06-21 20:51:13,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:13,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:13,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:13,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:51:13,507 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)] === [2024-06-21 20:51:13,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:13,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1846628049, now seen corresponding path program 1 times [2024-06-21 20:51:13,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:13,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829059220] [2024-06-21 20:51:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:13,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:14,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829059220] [2024-06-21 20:51:14,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829059220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:14,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:14,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:14,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252822357] [2024-06-21 20:51:14,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:14,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:14,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 485 transitions, 6671 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:14,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:14,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:14,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:15,456 INFO L124 PetriNetUnfolderBase]: 2948/4655 cut-off events. [2024-06-21 20:51:15,457 INFO L125 PetriNetUnfolderBase]: For 778301/778304 co-relation queries the response was YES. [2024-06-21 20:51:15,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52884 conditions, 4655 events. 2948/4655 cut-off events. For 778301/778304 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27001 event pairs, 516 based on Foata normal form. 1/4651 useless extension candidates. Maximal degree in co-relation 52732. Up to 4243 conditions per place. [2024-06-21 20:51:15,529 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 466 selfloop transitions, 44 changer transitions 0/515 dead transitions. [2024-06-21 20:51:15,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 515 transitions, 7905 flow [2024-06-21 20:51:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:51:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:51:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:51:15,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 20:51:15,531 INFO L175 Difference]: Start difference. First operand has 314 places, 485 transitions, 6671 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:51:15,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 515 transitions, 7905 flow [2024-06-21 20:51:16,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 515 transitions, 7737 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:16,863 INFO L231 Difference]: Finished difference. Result has 315 places, 491 transitions, 6750 flow [2024-06-21 20:51:16,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6503, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6750, PETRI_PLACES=315, PETRI_TRANSITIONS=491} [2024-06-21 20:51:16,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 20:51:16,864 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 491 transitions, 6750 flow [2024-06-21 20:51:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:16,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:16,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:16,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:51:16,864 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)] === [2024-06-21 20:51:16,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1880516839, now seen corresponding path program 2 times [2024-06-21 20:51:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:16,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098667713] [2024-06-21 20:51:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:17,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:17,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098667713] [2024-06-21 20:51:17,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098667713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:17,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:17,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395458318] [2024-06-21 20:51:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:17,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:17,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:17,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:17,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 491 transitions, 6750 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:17,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:17,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:17,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:18,754 INFO L124 PetriNetUnfolderBase]: 2953/4664 cut-off events. [2024-06-21 20:51:18,754 INFO L125 PetriNetUnfolderBase]: For 793212/793215 co-relation queries the response was YES. [2024-06-21 20:51:18,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53253 conditions, 4664 events. 2953/4664 cut-off events. For 793212/793215 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27109 event pairs, 516 based on Foata normal form. 1/4660 useless extension candidates. Maximal degree in co-relation 53100. Up to 4250 conditions per place. [2024-06-21 20:51:18,825 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 469 selfloop transitions, 41 changer transitions 0/515 dead transitions. [2024-06-21 20:51:18,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 515 transitions, 7948 flow [2024-06-21 20:51:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:51:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:51:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:51:18,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 20:51:18,827 INFO L175 Difference]: Start difference. First operand has 315 places, 491 transitions, 6750 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:51:18,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 515 transitions, 7948 flow [2024-06-21 20:51:20,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 515 transitions, 7754 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-21 20:51:20,359 INFO L231 Difference]: Finished difference. Result has 318 places, 494 transitions, 6774 flow [2024-06-21 20:51:20,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6774, PETRI_PLACES=318, PETRI_TRANSITIONS=494} [2024-06-21 20:51:20,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 20:51:20,360 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 494 transitions, 6774 flow [2024-06-21 20:51:20,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:20,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:20,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:51:20,361 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)] === [2024-06-21 20:51:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1852288959, now seen corresponding path program 3 times [2024-06-21 20:51:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557576351] [2024-06-21 20:51:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:21,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557576351] [2024-06-21 20:51:21,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557576351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:21,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:21,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:21,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849188289] [2024-06-21 20:51:21,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:21,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:21,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:21,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:21,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:21,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 494 transitions, 6774 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:21,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:21,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:22,399 INFO L124 PetriNetUnfolderBase]: 2958/4671 cut-off events. [2024-06-21 20:51:22,400 INFO L125 PetriNetUnfolderBase]: For 811917/811920 co-relation queries the response was YES. [2024-06-21 20:51:22,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53778 conditions, 4671 events. 2958/4671 cut-off events. For 811917/811920 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27074 event pairs, 516 based on Foata normal form. 1/4667 useless extension candidates. Maximal degree in co-relation 53624. Up to 4240 conditions per place. [2024-06-21 20:51:22,467 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 458 selfloop transitions, 52 changer transitions 0/515 dead transitions. [2024-06-21 20:51:22,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 515 transitions, 7970 flow [2024-06-21 20:51:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:51:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:51:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:51:22,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:51:22,469 INFO L175 Difference]: Start difference. First operand has 318 places, 494 transitions, 6774 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:51:22,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 515 transitions, 7970 flow [2024-06-21 20:51:23,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 515 transitions, 7765 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 20:51:23,965 INFO L231 Difference]: Finished difference. Result has 320 places, 497 transitions, 6816 flow [2024-06-21 20:51:23,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6816, PETRI_PLACES=320, PETRI_TRANSITIONS=497} [2024-06-21 20:51:23,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-21 20:51:23,965 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 497 transitions, 6816 flow [2024-06-21 20:51:23,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:23,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:23,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:23,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:51:23,966 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)] === [2024-06-21 20:51:23,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:23,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2108140623, now seen corresponding path program 1 times [2024-06-21 20:51:23,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:23,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929428453] [2024-06-21 20:51:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:23,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:24,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929428453] [2024-06-21 20:51:24,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929428453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:24,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:24,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002988916] [2024-06-21 20:51:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:24,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:24,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:25,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:25,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 497 transitions, 6816 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:25,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:25,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:25,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:26,225 INFO L124 PetriNetUnfolderBase]: 2968/4689 cut-off events. [2024-06-21 20:51:26,225 INFO L125 PetriNetUnfolderBase]: For 836378/836381 co-relation queries the response was YES. [2024-06-21 20:51:26,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54429 conditions, 4689 events. 2968/4689 cut-off events. For 836378/836381 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27220 event pairs, 514 based on Foata normal form. 2/4686 useless extension candidates. Maximal degree in co-relation 54274. Up to 4262 conditions per place. [2024-06-21 20:51:26,295 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 472 selfloop transitions, 46 changer transitions 0/523 dead transitions. [2024-06-21 20:51:26,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 523 transitions, 8068 flow [2024-06-21 20:51:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:51:26,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 20:51:26,297 INFO L175 Difference]: Start difference. First operand has 320 places, 497 transitions, 6816 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:51:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 523 transitions, 8068 flow [2024-06-21 20:51:27,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 523 transitions, 7845 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 20:51:27,964 INFO L231 Difference]: Finished difference. Result has 323 places, 501 transitions, 6860 flow [2024-06-21 20:51:27,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6593, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6860, PETRI_PLACES=323, PETRI_TRANSITIONS=501} [2024-06-21 20:51:27,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-21 20:51:27,965 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 501 transitions, 6860 flow [2024-06-21 20:51:27,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:27,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:27,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:27,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:51:27,966 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)] === [2024-06-21 20:51:27,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2111865490, now seen corresponding path program 1 times [2024-06-21 20:51:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:27,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122359858] [2024-06-21 20:51:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:27,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:28,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:28,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122359858] [2024-06-21 20:51:28,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122359858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:28,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993577812] [2024-06-21 20:51:28,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:28,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:28,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:28,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 501 transitions, 6860 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:28,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:28,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:28,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:30,009 INFO L124 PetriNetUnfolderBase]: 3008/4740 cut-off events. [2024-06-21 20:51:30,009 INFO L125 PetriNetUnfolderBase]: For 883810/883813 co-relation queries the response was YES. [2024-06-21 20:51:30,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55649 conditions, 4740 events. 3008/4740 cut-off events. For 883810/883813 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27432 event pairs, 504 based on Foata normal form. 10/4746 useless extension candidates. Maximal degree in co-relation 55493. Up to 4359 conditions per place. [2024-06-21 20:51:30,085 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 487 selfloop transitions, 39 changer transitions 0/531 dead transitions. [2024-06-21 20:51:30,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 531 transitions, 8236 flow [2024-06-21 20:51:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:51:30,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 20:51:30,086 INFO L175 Difference]: Start difference. First operand has 323 places, 501 transitions, 6860 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:51:30,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 531 transitions, 8236 flow [2024-06-21 20:51:31,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 531 transitions, 7997 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:31,844 INFO L231 Difference]: Finished difference. Result has 325 places, 510 transitions, 6986 flow [2024-06-21 20:51:31,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6621, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6986, PETRI_PLACES=325, PETRI_TRANSITIONS=510} [2024-06-21 20:51:31,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-21 20:51:31,844 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 510 transitions, 6986 flow [2024-06-21 20:51:31,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:31,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:31,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:31,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:51:31,845 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)] === [2024-06-21 20:51:31,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2111865273, now seen corresponding path program 2 times [2024-06-21 20:51:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:31,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611111669] [2024-06-21 20:51:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:32,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:32,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611111669] [2024-06-21 20:51:32,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611111669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:32,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:32,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:32,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043345186] [2024-06-21 20:51:32,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:32,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:32,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:32,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:32,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:33,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:33,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 510 transitions, 6986 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:33,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:33,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:33,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:34,471 INFO L124 PetriNetUnfolderBase]: 3018/4762 cut-off events. [2024-06-21 20:51:34,471 INFO L125 PetriNetUnfolderBase]: For 871718/871721 co-relation queries the response was YES. [2024-06-21 20:51:34,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55948 conditions, 4762 events. 3018/4762 cut-off events. For 871718/871721 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 27725 event pairs, 504 based on Foata normal form. 4/4762 useless extension candidates. Maximal degree in co-relation 55791. Up to 4391 conditions per place. [2024-06-21 20:51:34,544 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 495 selfloop transitions, 34 changer transitions 0/534 dead transitions. [2024-06-21 20:51:34,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 534 transitions, 8264 flow [2024-06-21 20:51:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:51:34,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:51:34,546 INFO L175 Difference]: Start difference. First operand has 325 places, 510 transitions, 6986 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:51:34,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 534 transitions, 8264 flow [2024-06-21 20:51:36,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 534 transitions, 8022 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:36,239 INFO L231 Difference]: Finished difference. Result has 327 places, 514 transitions, 6995 flow [2024-06-21 20:51:36,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6744, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6995, PETRI_PLACES=327, PETRI_TRANSITIONS=514} [2024-06-21 20:51:36,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-21 20:51:36,239 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 514 transitions, 6995 flow [2024-06-21 20:51:36,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:36,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:36,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:36,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:51:36,240 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)] === [2024-06-21 20:51:36,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash -986991982, now seen corresponding path program 2 times [2024-06-21 20:51:36,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:36,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124776430] [2024-06-21 20:51:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:36,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124776430] [2024-06-21 20:51:37,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124776430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:37,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:37,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:37,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572363775] [2024-06-21 20:51:37,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:37,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:37,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:37,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:37,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 514 transitions, 6995 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:37,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:37,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:37,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:38,589 INFO L124 PetriNetUnfolderBase]: 3042/4796 cut-off events. [2024-06-21 20:51:38,589 INFO L125 PetriNetUnfolderBase]: For 914232/914235 co-relation queries the response was YES. [2024-06-21 20:51:38,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56456 conditions, 4796 events. 3042/4796 cut-off events. For 914232/914235 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27894 event pairs, 505 based on Foata normal form. 10/4802 useless extension candidates. Maximal degree in co-relation 56298. Up to 4356 conditions per place. [2024-06-21 20:51:38,660 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 485 selfloop transitions, 51 changer transitions 0/541 dead transitions. [2024-06-21 20:51:38,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 541 transitions, 8401 flow [2024-06-21 20:51:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:51:38,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 20:51:38,664 INFO L175 Difference]: Start difference. First operand has 327 places, 514 transitions, 6995 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:51:38,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 541 transitions, 8401 flow [2024-06-21 20:51:40,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 541 transitions, 8178 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:40,334 INFO L231 Difference]: Finished difference. Result has 329 places, 523 transitions, 7179 flow [2024-06-21 20:51:40,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7179, PETRI_PLACES=329, PETRI_TRANSITIONS=523} [2024-06-21 20:51:40,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-21 20:51:40,335 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 523 transitions, 7179 flow [2024-06-21 20:51:40,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:40,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:40,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:40,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:51:40,335 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)] === [2024-06-21 20:51:40,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1242843491, now seen corresponding path program 3 times [2024-06-21 20:51:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:40,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582611429] [2024-06-21 20:51:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:40,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:41,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:41,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582611429] [2024-06-21 20:51:41,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582611429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:41,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:41,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:41,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275374548] [2024-06-21 20:51:41,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:41,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:41,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:41,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:41,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:41,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 523 transitions, 7179 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:41,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:41,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:41,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:42,959 INFO L124 PetriNetUnfolderBase]: 3052/4814 cut-off events. [2024-06-21 20:51:42,960 INFO L125 PetriNetUnfolderBase]: For 902369/902372 co-relation queries the response was YES. [2024-06-21 20:51:43,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56816 conditions, 4814 events. 3052/4814 cut-off events. For 902369/902372 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 28035 event pairs, 505 based on Foata normal form. 4/4814 useless extension candidates. Maximal degree in co-relation 56657. Up to 4388 conditions per place. [2024-06-21 20:51:43,034 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 493 selfloop transitions, 46 changer transitions 0/544 dead transitions. [2024-06-21 20:51:43,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 544 transitions, 8477 flow [2024-06-21 20:51:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:51:43,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 20:51:43,036 INFO L175 Difference]: Start difference. First operand has 329 places, 523 transitions, 7179 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:51:43,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 544 transitions, 8477 flow [2024-06-21 20:51:44,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 544 transitions, 8193 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:45,031 INFO L231 Difference]: Finished difference. Result has 331 places, 527 transitions, 7178 flow [2024-06-21 20:51:45,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7178, PETRI_PLACES=331, PETRI_TRANSITIONS=527} [2024-06-21 20:51:45,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-21 20:51:45,034 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 527 transitions, 7178 flow [2024-06-21 20:51:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:45,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:45,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:45,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:51:45,035 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)] === [2024-06-21 20:51:45,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash -979640332, now seen corresponding path program 3 times [2024-06-21 20:51:45,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:45,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789989198] [2024-06-21 20:51:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:45,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:46,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:46,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789989198] [2024-06-21 20:51:46,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789989198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:46,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:46,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:46,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696326272] [2024-06-21 20:51:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:46,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:46,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:46,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:46,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 527 transitions, 7178 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:46,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:46,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:46,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:47,311 INFO L124 PetriNetUnfolderBase]: 3088/4864 cut-off events. [2024-06-21 20:51:47,311 INFO L125 PetriNetUnfolderBase]: For 941960/941963 co-relation queries the response was YES. [2024-06-21 20:51:47,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57903 conditions, 4864 events. 3088/4864 cut-off events. For 941960/941963 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 28303 event pairs, 504 based on Foata normal form. 6/4866 useless extension candidates. Maximal degree in co-relation 57743. Up to 4144 conditions per place. [2024-06-21 20:51:47,384 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 427 selfloop transitions, 127 changer transitions 0/559 dead transitions. [2024-06-21 20:51:47,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 559 transitions, 9143 flow [2024-06-21 20:51:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:51:47,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:51:47,385 INFO L175 Difference]: Start difference. First operand has 331 places, 527 transitions, 7178 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:51:47,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 559 transitions, 9143 flow [2024-06-21 20:51:49,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 559 transitions, 8888 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:49,482 INFO L231 Difference]: Finished difference. Result has 333 places, 539 transitions, 7574 flow [2024-06-21 20:51:49,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6923, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7574, PETRI_PLACES=333, PETRI_TRANSITIONS=539} [2024-06-21 20:51:49,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-21 20:51:49,484 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 539 transitions, 7574 flow [2024-06-21 20:51:49,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:49,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:49,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:49,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:51:49,484 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)] === [2024-06-21 20:51:49,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash -877288839, now seen corresponding path program 4 times [2024-06-21 20:51:49,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:49,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685440182] [2024-06-21 20:51:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:49,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685440182] [2024-06-21 20:51:50,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685440182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:50,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:50,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:50,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731734502] [2024-06-21 20:51:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:50,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:50,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:50,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 539 transitions, 7574 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:50,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:50,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:50,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:52,130 INFO L124 PetriNetUnfolderBase]: 3114/4904 cut-off events. [2024-06-21 20:51:52,131 INFO L125 PetriNetUnfolderBase]: For 962480/962483 co-relation queries the response was YES. [2024-06-21 20:51:52,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59074 conditions, 4904 events. 3114/4904 cut-off events. For 962480/962483 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 28589 event pairs, 507 based on Foata normal form. 4/4904 useless extension candidates. Maximal degree in co-relation 58913. Up to 4373 conditions per place. [2024-06-21 20:51:52,203 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 487 selfloop transitions, 72 changer transitions 0/564 dead transitions. [2024-06-21 20:51:52,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 564 transitions, 9304 flow [2024-06-21 20:51:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:51:52,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:51:52,204 INFO L175 Difference]: Start difference. First operand has 333 places, 539 transitions, 7574 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:51:52,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 564 transitions, 9304 flow [2024-06-21 20:51:54,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 564 transitions, 9013 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-21 20:51:54,115 INFO L231 Difference]: Finished difference. Result has 337 places, 546 transitions, 7748 flow [2024-06-21 20:51:54,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7283, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7748, PETRI_PLACES=337, PETRI_TRANSITIONS=546} [2024-06-21 20:51:54,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-21 20:51:54,115 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 546 transitions, 7748 flow [2024-06-21 20:51:54,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:54,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:54,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:54,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:51:54,116 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)] === [2024-06-21 20:51:54,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash -979373422, now seen corresponding path program 4 times [2024-06-21 20:51:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:54,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124955799] [2024-06-21 20:51:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:54,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:55,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:55,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124955799] [2024-06-21 20:51:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124955799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:55,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:55,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078061299] [2024-06-21 20:51:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:55,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:55,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:55,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:55,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 546 transitions, 7748 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:55,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:55,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:55,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:56,390 INFO L124 PetriNetUnfolderBase]: 3104/4891 cut-off events. [2024-06-21 20:51:56,391 INFO L125 PetriNetUnfolderBase]: For 974511/974514 co-relation queries the response was YES. [2024-06-21 20:51:56,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58773 conditions, 4891 events. 3104/4891 cut-off events. For 974511/974514 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 28510 event pairs, 504 based on Foata normal form. 6/4893 useless extension candidates. Maximal degree in co-relation 58611. Up to 4175 conditions per place. [2024-06-21 20:51:56,477 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 432 selfloop transitions, 127 changer transitions 0/564 dead transitions. [2024-06-21 20:51:56,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 564 transitions, 9127 flow [2024-06-21 20:51:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:51:56,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 20:51:56,478 INFO L175 Difference]: Start difference. First operand has 337 places, 546 transitions, 7748 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:51:56,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 564 transitions, 9127 flow [2024-06-21 20:51:58,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 564 transitions, 8746 flow, removed 166 selfloop flow, removed 5 redundant places. [2024-06-21 20:51:58,521 INFO L231 Difference]: Finished difference. Result has 341 places, 546 transitions, 7637 flow [2024-06-21 20:51:58,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7367, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7637, PETRI_PLACES=341, PETRI_TRANSITIONS=546} [2024-06-21 20:51:58,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-21 20:51:58,522 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 546 transitions, 7637 flow [2024-06-21 20:51:58,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:58,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:58,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:58,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:51:58,523 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)] === [2024-06-21 20:51:58,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash -990488441, now seen corresponding path program 4 times [2024-06-21 20:51:58,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:58,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087025936] [2024-06-21 20:51:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:58,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:59,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:59,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087025936] [2024-06-21 20:51:59,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087025936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:59,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:59,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:59,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389800120] [2024-06-21 20:51:59,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:59,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:59,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:59,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:51:59,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 546 transitions, 7637 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:59,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:59,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:51:59,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:00,794 INFO L124 PetriNetUnfolderBase]: 3295/5196 cut-off events. [2024-06-21 20:52:00,795 INFO L125 PetriNetUnfolderBase]: For 1033917/1033922 co-relation queries the response was YES. [2024-06-21 20:52:00,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61560 conditions, 5196 events. 3295/5196 cut-off events. For 1033917/1033922 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30544 event pairs, 526 based on Foata normal form. 16/5202 useless extension candidates. Maximal degree in co-relation 61396. Up to 4661 conditions per place. [2024-06-21 20:52:00,875 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 547 selfloop transitions, 54 changer transitions 0/606 dead transitions. [2024-06-21 20:52:00,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 606 transitions, 9677 flow [2024-06-21 20:52:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:52:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:52:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 20:52:00,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-21 20:52:00,877 INFO L175 Difference]: Start difference. First operand has 341 places, 546 transitions, 7637 flow. Second operand 10 states and 179 transitions. [2024-06-21 20:52:00,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 606 transitions, 9677 flow [2024-06-21 20:52:03,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 606 transitions, 9425 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:52:03,288 INFO L231 Difference]: Finished difference. Result has 347 places, 578 transitions, 8204 flow [2024-06-21 20:52:03,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7433, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8204, PETRI_PLACES=347, PETRI_TRANSITIONS=578} [2024-06-21 20:52:03,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-21 20:52:03,289 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 578 transitions, 8204 flow [2024-06-21 20:52:03,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:03,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:03,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:03,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:52:03,290 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)] === [2024-06-21 20:52:03,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1246666163, now seen corresponding path program 5 times [2024-06-21 20:52:03,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:03,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524070506] [2024-06-21 20:52:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:03,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:04,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:04,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524070506] [2024-06-21 20:52:04,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524070506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:04,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:04,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:52:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236511000] [2024-06-21 20:52:04,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:04,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:52:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:52:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:52:04,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:04,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 578 transitions, 8204 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:04,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:04,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:04,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:05,804 INFO L124 PetriNetUnfolderBase]: 3339/5259 cut-off events. [2024-06-21 20:52:05,805 INFO L125 PetriNetUnfolderBase]: For 1059103/1059108 co-relation queries the response was YES. [2024-06-21 20:52:05,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62683 conditions, 5259 events. 3339/5259 cut-off events. For 1059103/1059108 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 31007 event pairs, 524 based on Foata normal form. 14/5269 useless extension candidates. Maximal degree in co-relation 62515. Up to 4613 conditions per place. [2024-06-21 20:52:05,890 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 535 selfloop transitions, 67 changer transitions 0/607 dead transitions. [2024-06-21 20:52:05,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 607 transitions, 9890 flow [2024-06-21 20:52:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:52:05,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 20:52:05,892 INFO L175 Difference]: Start difference. First operand has 347 places, 578 transitions, 8204 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:52:05,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 607 transitions, 9890 flow [2024-06-21 20:52:08,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 607 transitions, 9731 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:08,402 INFO L231 Difference]: Finished difference. Result has 353 places, 581 transitions, 8359 flow [2024-06-21 20:52:08,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8045, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8359, PETRI_PLACES=353, PETRI_TRANSITIONS=581} [2024-06-21 20:52:08,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-21 20:52:08,403 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 581 transitions, 8359 flow [2024-06-21 20:52:08,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:08,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:08,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:08,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:52:08,403 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)] === [2024-06-21 20:52:08,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:08,409 INFO L85 PathProgramCache]: Analyzing trace with hash -979763681, now seen corresponding path program 6 times [2024-06-21 20:52:08,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:08,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273742299] [2024-06-21 20:52:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:08,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:09,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:09,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273742299] [2024-06-21 20:52:09,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273742299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:09,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:09,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:52:09,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756894157] [2024-06-21 20:52:09,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:09,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:52:09,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:52:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:52:09,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:09,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 581 transitions, 8359 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:09,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:09,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:09,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:11,110 INFO L124 PetriNetUnfolderBase]: 3383/5331 cut-off events. [2024-06-21 20:52:11,111 INFO L125 PetriNetUnfolderBase]: For 1086653/1086658 co-relation queries the response was YES. [2024-06-21 20:52:11,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63817 conditions, 5331 events. 3383/5331 cut-off events. For 1086653/1086658 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31521 event pairs, 554 based on Foata normal form. 14/5341 useless extension candidates. Maximal degree in co-relation 63648. Up to 4638 conditions per place. [2024-06-21 20:52:11,185 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 506 selfloop transitions, 93 changer transitions 0/604 dead transitions. [2024-06-21 20:52:11,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 604 transitions, 9879 flow [2024-06-21 20:52:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:52:11,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 20:52:11,187 INFO L175 Difference]: Start difference. First operand has 353 places, 581 transitions, 8359 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:52:11,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 604 transitions, 9879 flow [2024-06-21 20:52:13,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 604 transitions, 9627 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 20:52:13,133 INFO L231 Difference]: Finished difference. Result has 355 places, 584 transitions, 8480 flow [2024-06-21 20:52:13,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8107, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8480, PETRI_PLACES=355, PETRI_TRANSITIONS=584} [2024-06-21 20:52:13,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-21 20:52:13,133 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 584 transitions, 8480 flow [2024-06-21 20:52:13,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:13,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:13,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:13,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:52:13,134 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)] === [2024-06-21 20:52:13,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash -979363967, now seen corresponding path program 1 times [2024-06-21 20:52:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:13,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154595915] [2024-06-21 20:52:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:13,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:14,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154595915] [2024-06-21 20:52:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154595915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:14,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:14,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:52:14,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838004749] [2024-06-21 20:52:14,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:14,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:52:14,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:52:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:52:14,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:14,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 584 transitions, 8480 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:14,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:14,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:14,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:16,083 INFO L124 PetriNetUnfolderBase]: 3402/5360 cut-off events. [2024-06-21 20:52:16,083 INFO L125 PetriNetUnfolderBase]: For 1055858/1055863 co-relation queries the response was YES. [2024-06-21 20:52:16,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64285 conditions, 5360 events. 3402/5360 cut-off events. For 1055858/1055863 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 31738 event pairs, 550 based on Foata normal form. 5/5361 useless extension candidates. Maximal degree in co-relation 64115. Up to 4474 conditions per place. [2024-06-21 20:52:16,162 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 450 selfloop transitions, 156 changer transitions 0/611 dead transitions. [2024-06-21 20:52:16,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 611 transitions, 10363 flow [2024-06-21 20:52:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:52:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:52:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 20:52:16,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:52:16,163 INFO L175 Difference]: Start difference. First operand has 355 places, 584 transitions, 8480 flow. Second operand 10 states and 185 transitions. [2024-06-21 20:52:16,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 611 transitions, 10363 flow [2024-06-21 20:52:18,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 611 transitions, 10054 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 20:52:18,167 INFO L231 Difference]: Finished difference. Result has 358 places, 589 transitions, 8661 flow [2024-06-21 20:52:18,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8171, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8661, PETRI_PLACES=358, PETRI_TRANSITIONS=589} [2024-06-21 20:52:18,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-21 20:52:18,167 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 589 transitions, 8661 flow [2024-06-21 20:52:18,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:18,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:18,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:18,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:52:18,168 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)] === [2024-06-21 20:52:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash -979363502, now seen corresponding path program 1 times [2024-06-21 20:52:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:18,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136257560] [2024-06-21 20:52:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:19,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:19,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136257560] [2024-06-21 20:52:19,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136257560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:19,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:19,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:52:19,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093840565] [2024-06-21 20:52:19,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:19,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:52:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:52:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:52:19,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:19,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 589 transitions, 8661 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:19,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:19,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:19,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:20,957 INFO L124 PetriNetUnfolderBase]: 3410/5374 cut-off events. [2024-06-21 20:52:20,957 INFO L125 PetriNetUnfolderBase]: For 1066163/1066169 co-relation queries the response was YES. [2024-06-21 20:52:21,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64697 conditions, 5374 events. 3410/5374 cut-off events. For 1066163/1066169 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31824 event pairs, 532 based on Foata normal form. 8/5379 useless extension candidates. Maximal degree in co-relation 64526. Up to 5032 conditions per place. [2024-06-21 20:52:21,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 579 selfloop transitions, 25 changer transitions 0/609 dead transitions. [2024-06-21 20:52:21,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 609 transitions, 10075 flow [2024-06-21 20:52:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 20:52:21,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:52:21,045 INFO L175 Difference]: Start difference. First operand has 358 places, 589 transitions, 8661 flow. Second operand 9 states and 153 transitions. [2024-06-21 20:52:21,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 609 transitions, 10075 flow [2024-06-21 20:52:23,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 609 transitions, 9630 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-21 20:52:23,693 INFO L231 Difference]: Finished difference. Result has 360 places, 591 transitions, 8431 flow [2024-06-21 20:52:23,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8216, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8431, PETRI_PLACES=360, PETRI_TRANSITIONS=591} [2024-06-21 20:52:23,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-21 20:52:23,693 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 591 transitions, 8431 flow [2024-06-21 20:52:23,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:23,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:23,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:23,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:52:23,694 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)] === [2024-06-21 20:52:23,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash -979376987, now seen corresponding path program 2 times [2024-06-21 20:52:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:23,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432648413] [2024-06-21 20:52:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:25,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432648413] [2024-06-21 20:52:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432648413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:25,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:25,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:52:25,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440829378] [2024-06-21 20:52:25,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:25,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:52:25,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:52:25,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:52:25,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:25,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 591 transitions, 8431 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:25,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:25,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:25,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:26,764 INFO L124 PetriNetUnfolderBase]: 3403/5363 cut-off events. [2024-06-21 20:52:26,764 INFO L125 PetriNetUnfolderBase]: For 1070798/1070803 co-relation queries the response was YES. [2024-06-21 20:52:26,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63691 conditions, 5363 events. 3403/5363 cut-off events. For 1070798/1070803 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31776 event pairs, 554 based on Foata normal form. 5/5364 useless extension candidates. Maximal degree in co-relation 63519. Up to 4481 conditions per place. [2024-06-21 20:52:26,849 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 442 selfloop transitions, 161 changer transitions 0/608 dead transitions. [2024-06-21 20:52:26,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 608 transitions, 9895 flow [2024-06-21 20:52:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:52:26,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 20:52:26,850 INFO L175 Difference]: Start difference. First operand has 360 places, 591 transitions, 8431 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:52:26,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 608 transitions, 9895 flow [2024-06-21 20:52:29,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 608 transitions, 9492 flow, removed 138 selfloop flow, removed 8 redundant places. [2024-06-21 20:52:29,314 INFO L231 Difference]: Finished difference. Result has 361 places, 591 transitions, 8378 flow [2024-06-21 20:52:29,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8028, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8378, PETRI_PLACES=361, PETRI_TRANSITIONS=591} [2024-06-21 20:52:29,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-21 20:52:29,315 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 591 transitions, 8378 flow [2024-06-21 20:52:29,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:29,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:29,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:29,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:52:29,316 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)] === [2024-06-21 20:52:29,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1587862619, now seen corresponding path program 4 times [2024-06-21 20:52:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:29,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93308854] [2024-06-21 20:52:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:29,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:30,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:30,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93308854] [2024-06-21 20:52:30,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93308854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:30,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:30,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:52:30,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246961127] [2024-06-21 20:52:30,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:30,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:52:30,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:30,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:52:30,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:52:30,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:30,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 591 transitions, 8378 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:30,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:30,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:30,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:31,471 INFO L124 PetriNetUnfolderBase]: 3408/5376 cut-off events. [2024-06-21 20:52:31,471 INFO L125 PetriNetUnfolderBase]: For 1064290/1064299 co-relation queries the response was YES. [2024-06-21 20:52:31,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63394 conditions, 5376 events. 3408/5376 cut-off events. For 1064290/1064299 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31870 event pairs, 548 based on Foata normal form. 7/5378 useless extension candidates. Maximal degree in co-relation 63222. Up to 4831 conditions per place. [2024-06-21 20:52:31,552 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 549 selfloop transitions, 61 changer transitions 0/615 dead transitions. [2024-06-21 20:52:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 615 transitions, 9808 flow [2024-06-21 20:52:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:52:31,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-21 20:52:31,553 INFO L175 Difference]: Start difference. First operand has 361 places, 591 transitions, 8378 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:52:31,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 615 transitions, 9808 flow [2024-06-21 20:52:34,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 615 transitions, 9545 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:52:34,172 INFO L231 Difference]: Finished difference. Result has 361 places, 594 transitions, 8414 flow [2024-06-21 20:52:34,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8115, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8414, PETRI_PLACES=361, PETRI_TRANSITIONS=594} [2024-06-21 20:52:34,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-21 20:52:34,173 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 594 transitions, 8414 flow [2024-06-21 20:52:34,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:34,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:34,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:34,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:52:34,173 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)] === [2024-06-21 20:52:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1477556993, now seen corresponding path program 5 times [2024-06-21 20:52:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:34,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394001699] [2024-06-21 20:52:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:34,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:35,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:35,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394001699] [2024-06-21 20:52:35,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394001699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:35,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:52:35,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219105800] [2024-06-21 20:52:35,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:35,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:52:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:52:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:52:35,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:35,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 594 transitions, 8414 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:35,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:35,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:35,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:36,487 INFO L124 PetriNetUnfolderBase]: 3413/5380 cut-off events. [2024-06-21 20:52:36,487 INFO L125 PetriNetUnfolderBase]: For 1071313/1071318 co-relation queries the response was YES. [2024-06-21 20:52:36,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63597 conditions, 5380 events. 3413/5380 cut-off events. For 1071313/1071318 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31876 event pairs, 554 based on Foata normal form. 1/5376 useless extension candidates. Maximal degree in co-relation 63424. Up to 4720 conditions per place. [2024-06-21 20:52:36,571 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 507 selfloop transitions, 100 changer transitions 0/612 dead transitions. [2024-06-21 20:52:36,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 612 transitions, 9822 flow [2024-06-21 20:52:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 20:52:36,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-21 20:52:36,573 INFO L175 Difference]: Start difference. First operand has 361 places, 594 transitions, 8414 flow. Second operand 7 states and 134 transitions. [2024-06-21 20:52:36,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 612 transitions, 9822 flow [2024-06-21 20:52:39,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 612 transitions, 9623 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 20:52:39,249 INFO L231 Difference]: Finished difference. Result has 363 places, 597 transitions, 8601 flow [2024-06-21 20:52:39,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8215, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8601, PETRI_PLACES=363, PETRI_TRANSITIONS=597} [2024-06-21 20:52:39,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-21 20:52:39,249 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 597 transitions, 8601 flow [2024-06-21 20:52:39,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:39,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:39,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:52:39,250 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)] === [2024-06-21 20:52:39,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1477557365, now seen corresponding path program 5 times [2024-06-21 20:52:39,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:39,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150932996] [2024-06-21 20:52:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:39,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:40,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150932996] [2024-06-21 20:52:40,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150932996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:40,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:40,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:52:40,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826877122] [2024-06-21 20:52:40,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:40,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:52:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:52:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:52:40,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:40,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 597 transitions, 8601 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:40,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:40,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:40,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:42,007 INFO L124 PetriNetUnfolderBase]: 3418/5376 cut-off events. [2024-06-21 20:52:42,007 INFO L125 PetriNetUnfolderBase]: For 1095315/1095317 co-relation queries the response was YES. [2024-06-21 20:52:42,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64342 conditions, 5376 events. 3418/5376 cut-off events. For 1095315/1095317 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31757 event pairs, 570 based on Foata normal form. 1/5361 useless extension candidates. Maximal degree in co-relation 64168. Up to 4866 conditions per place. [2024-06-21 20:52:42,100 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 562 selfloop transitions, 53 changer transitions 0/620 dead transitions. [2024-06-21 20:52:42,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 620 transitions, 10043 flow [2024-06-21 20:52:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:52:42,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 20:52:42,101 INFO L175 Difference]: Start difference. First operand has 363 places, 597 transitions, 8601 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:52:42,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 620 transitions, 10043 flow [2024-06-21 20:52:44,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 620 transitions, 9751 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 20:52:44,609 INFO L231 Difference]: Finished difference. Result has 367 places, 600 transitions, 8589 flow [2024-06-21 20:52:44,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8309, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8589, PETRI_PLACES=367, PETRI_TRANSITIONS=600} [2024-06-21 20:52:44,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-21 20:52:44,610 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 600 transitions, 8589 flow [2024-06-21 20:52:44,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:44,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:44,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:44,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:52:44,610 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)] === [2024-06-21 20:52:44,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1398715707, now seen corresponding path program 6 times [2024-06-21 20:52:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:44,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922003537] [2024-06-21 20:52:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:44,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:45,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922003537] [2024-06-21 20:52:45,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922003537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:45,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:45,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:52:45,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010813866] [2024-06-21 20:52:45,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:45,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:52:45,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:52:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:52:45,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:45,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 600 transitions, 8589 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:45,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:45,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:45,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:47,024 INFO L124 PetriNetUnfolderBase]: 3423/5383 cut-off events. [2024-06-21 20:52:47,025 INFO L125 PetriNetUnfolderBase]: For 1116194/1116196 co-relation queries the response was YES. [2024-06-21 20:52:47,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64765 conditions, 5383 events. 3423/5383 cut-off events. For 1116194/1116196 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31860 event pairs, 570 based on Foata normal form. 1/5368 useless extension candidates. Maximal degree in co-relation 64590. Up to 4858 conditions per place. [2024-06-21 20:52:47,118 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 550 selfloop transitions, 65 changer transitions 0/620 dead transitions. [2024-06-21 20:52:47,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 620 transitions, 10029 flow [2024-06-21 20:52:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:52:47,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:52:47,119 INFO L175 Difference]: Start difference. First operand has 367 places, 600 transitions, 8589 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:52:47,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 620 transitions, 10029 flow [2024-06-21 20:52:49,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 620 transitions, 9771 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-21 20:52:49,910 INFO L231 Difference]: Finished difference. Result has 369 places, 603 transitions, 8641 flow [2024-06-21 20:52:49,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8331, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8641, PETRI_PLACES=369, PETRI_TRANSITIONS=603} [2024-06-21 20:52:49,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-21 20:52:49,910 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 603 transitions, 8641 flow [2024-06-21 20:52:49,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:49,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:49,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:49,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:52:49,911 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)] === [2024-06-21 20:52:49,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash 722562187, now seen corresponding path program 6 times [2024-06-21 20:52:49,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:49,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286036736] [2024-06-21 20:52:49,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:49,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:50,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:50,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286036736] [2024-06-21 20:52:50,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286036736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:50,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:50,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:52:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243003605] [2024-06-21 20:52:50,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:52:50,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:52:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:52:50,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:50,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 603 transitions, 8641 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:50,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:50,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:50,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:52,230 INFO L124 PetriNetUnfolderBase]: 3420/5390 cut-off events. [2024-06-21 20:52:52,230 INFO L125 PetriNetUnfolderBase]: For 1129387/1129392 co-relation queries the response was YES. [2024-06-21 20:52:52,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64909 conditions, 5390 events. 3420/5390 cut-off events. For 1129387/1129392 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31908 event pairs, 614 based on Foata normal form. 1/5376 useless extension candidates. Maximal degree in co-relation 64733. Up to 4656 conditions per place. [2024-06-21 20:52:52,367 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 490 selfloop transitions, 121 changer transitions 0/616 dead transitions. [2024-06-21 20:52:52,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 616 transitions, 10059 flow [2024-06-21 20:52:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:52:52,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-21 20:52:52,369 INFO L175 Difference]: Start difference. First operand has 369 places, 603 transitions, 8641 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:52:52,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 616 transitions, 10059 flow [2024-06-21 20:52:54,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 616 transitions, 9771 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-21 20:52:54,949 INFO L231 Difference]: Finished difference. Result has 369 places, 606 transitions, 8779 flow [2024-06-21 20:52:54,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8353, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8779, PETRI_PLACES=369, PETRI_TRANSITIONS=606} [2024-06-21 20:52:54,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-21 20:52:54,950 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 606 transitions, 8779 flow [2024-06-21 20:52:54,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:54,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:54,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:54,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:52:54,951 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)] === [2024-06-21 20:52:54,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1265651919, now seen corresponding path program 7 times [2024-06-21 20:52:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:54,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522536576] [2024-06-21 20:52:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:56,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:56,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522536576] [2024-06-21 20:52:56,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522536576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:56,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:56,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:52:56,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601485815] [2024-06-21 20:52:56,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:56,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:52:56,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:56,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:52:56,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:52:56,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:56,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 606 transitions, 8779 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:56,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:56,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:56,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:57,620 INFO L124 PetriNetUnfolderBase]: 3425/5388 cut-off events. [2024-06-21 20:52:57,621 INFO L125 PetriNetUnfolderBase]: For 1153416/1153418 co-relation queries the response was YES. [2024-06-21 20:52:57,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65607 conditions, 5388 events. 3425/5388 cut-off events. For 1153416/1153418 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31883 event pairs, 570 based on Foata normal form. 1/5373 useless extension candidates. Maximal degree in co-relation 65430. Up to 4876 conditions per place. [2024-06-21 20:52:57,712 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 573 selfloop transitions, 51 changer transitions 0/629 dead transitions. [2024-06-21 20:52:57,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 629 transitions, 10253 flow [2024-06-21 20:52:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:52:57,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 20:52:57,714 INFO L175 Difference]: Start difference. First operand has 369 places, 606 transitions, 8779 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:52:57,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 629 transitions, 10253 flow [2024-06-21 20:53:00,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 629 transitions, 9887 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:00,301 INFO L231 Difference]: Finished difference. Result has 373 places, 609 transitions, 8703 flow [2024-06-21 20:53:00,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8413, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8703, PETRI_PLACES=373, PETRI_TRANSITIONS=609} [2024-06-21 20:53:00,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-21 20:53:00,302 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 609 transitions, 8703 flow [2024-06-21 20:53:00,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:00,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:00,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:53:00,303 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)] === [2024-06-21 20:53:00,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash -651874033, now seen corresponding path program 8 times [2024-06-21 20:53:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:00,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744092487] [2024-06-21 20:53:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:01,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:01,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744092487] [2024-06-21 20:53:01,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744092487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:01,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:01,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:01,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003801020] [2024-06-21 20:53:01,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:01,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:01,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:01,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:01,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:01,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:01,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 609 transitions, 8703 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:01,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:01,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:01,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:02,909 INFO L124 PetriNetUnfolderBase]: 3430/5397 cut-off events. [2024-06-21 20:53:02,909 INFO L125 PetriNetUnfolderBase]: For 1175108/1175110 co-relation queries the response was YES. [2024-06-21 20:53:02,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65938 conditions, 5397 events. 3430/5397 cut-off events. For 1175108/1175110 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31977 event pairs, 570 based on Foata normal form. 1/5382 useless extension candidates. Maximal degree in co-relation 65760. Up to 4850 conditions per place. [2024-06-21 20:53:02,995 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 547 selfloop transitions, 80 changer transitions 0/632 dead transitions. [2024-06-21 20:53:02,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 632 transitions, 10231 flow [2024-06-21 20:53:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:53:02,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:53:02,997 INFO L175 Difference]: Start difference. First operand has 373 places, 609 transitions, 8703 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:53:02,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 632 transitions, 10231 flow [2024-06-21 20:53:06,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 632 transitions, 9963 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:06,184 INFO L231 Difference]: Finished difference. Result has 376 places, 615 transitions, 8864 flow [2024-06-21 20:53:06,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8435, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8864, PETRI_PLACES=376, PETRI_TRANSITIONS=615} [2024-06-21 20:53:06,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-21 20:53:06,185 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 615 transitions, 8864 flow [2024-06-21 20:53:06,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:06,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:06,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:06,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:53:06,186 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)] === [2024-06-21 20:53:06,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1780526848, now seen corresponding path program 5 times [2024-06-21 20:53:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:06,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652824092] [2024-06-21 20:53:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:06,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:07,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:07,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652824092] [2024-06-21 20:53:07,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652824092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:07,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:07,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:07,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495649380] [2024-06-21 20:53:07,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:07,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:07,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:07,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:07,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 615 transitions, 8864 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:07,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:07,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:07,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:08,523 INFO L124 PetriNetUnfolderBase]: 3406/5363 cut-off events. [2024-06-21 20:53:08,524 INFO L125 PetriNetUnfolderBase]: For 1189689/1189691 co-relation queries the response was YES. [2024-06-21 20:53:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65563 conditions, 5363 events. 3406/5363 cut-off events. For 1189689/1189691 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31749 event pairs, 556 based on Foata normal form. 4/5354 useless extension candidates. Maximal degree in co-relation 65383. Up to 4923 conditions per place. [2024-06-21 20:53:08,613 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 42 changer transitions 0/634 dead transitions. [2024-06-21 20:53:08,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 634 transitions, 10183 flow [2024-06-21 20:53:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:53:08,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:53:08,615 INFO L175 Difference]: Start difference. First operand has 376 places, 615 transitions, 8864 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:53:08,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 634 transitions, 10183 flow [2024-06-21 20:53:11,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 634 transitions, 9771 flow, removed 167 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:11,668 INFO L231 Difference]: Finished difference. Result has 380 places, 615 transitions, 8550 flow [2024-06-21 20:53:11,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8456, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8550, PETRI_PLACES=380, PETRI_TRANSITIONS=615} [2024-06-21 20:53:11,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-21 20:53:11,669 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 615 transitions, 8550 flow [2024-06-21 20:53:11,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:11,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:11,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:11,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:53:11,670 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)] === [2024-06-21 20:53:11,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash 522170809, now seen corresponding path program 9 times [2024-06-21 20:53:11,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:11,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580282277] [2024-06-21 20:53:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:11,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:12,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:12,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580282277] [2024-06-21 20:53:12,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580282277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:12,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:12,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:12,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837099247] [2024-06-21 20:53:12,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:12,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:12,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:12,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:12,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:12,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:12,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 615 transitions, 8550 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:12,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:12,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:12,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:14,322 INFO L124 PetriNetUnfolderBase]: 3403/5359 cut-off events. [2024-06-21 20:53:14,323 INFO L125 PetriNetUnfolderBase]: For 1174638/1174640 co-relation queries the response was YES. [2024-06-21 20:53:14,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65161 conditions, 5359 events. 3403/5359 cut-off events. For 1174638/1174640 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31701 event pairs, 556 based on Foata normal form. 1/5347 useless extension candidates. Maximal degree in co-relation 64979. Up to 4928 conditions per place. [2024-06-21 20:53:14,410 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 593 selfloop transitions, 38 changer transitions 0/636 dead transitions. [2024-06-21 20:53:14,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 636 transitions, 10010 flow [2024-06-21 20:53:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:53:14,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:53:14,412 INFO L175 Difference]: Start difference. First operand has 380 places, 615 transitions, 8550 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:53:14,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 636 transitions, 10010 flow [2024-06-21 20:53:17,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 636 transitions, 9524 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-21 20:53:17,269 INFO L231 Difference]: Finished difference. Result has 378 places, 618 transitions, 8304 flow [2024-06-21 20:53:17,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8304, PETRI_PLACES=378, PETRI_TRANSITIONS=618} [2024-06-21 20:53:17,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 20:53:17,269 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 618 transitions, 8304 flow [2024-06-21 20:53:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:17,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:17,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:17,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:53:17,270 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)] === [2024-06-21 20:53:17,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1380576622, now seen corresponding path program 6 times [2024-06-21 20:53:17,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:17,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705023204] [2024-06-21 20:53:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:18,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705023204] [2024-06-21 20:53:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705023204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:18,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:18,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152642165] [2024-06-21 20:53:18,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:18,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:18,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:18,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 618 transitions, 8304 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:18,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:18,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:18,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:19,666 INFO L124 PetriNetUnfolderBase]: 3423/5381 cut-off events. [2024-06-21 20:53:19,667 INFO L125 PetriNetUnfolderBase]: For 1215061/1215063 co-relation queries the response was YES. [2024-06-21 20:53:19,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65453 conditions, 5381 events. 3423/5381 cut-off events. For 1215061/1215063 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31794 event pairs, 550 based on Foata normal form. 4/5372 useless extension candidates. Maximal degree in co-relation 65270. Up to 4909 conditions per place. [2024-06-21 20:53:19,757 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 580 selfloop transitions, 57 changer transitions 0/642 dead transitions. [2024-06-21 20:53:19,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 642 transitions, 9893 flow [2024-06-21 20:53:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:53:19,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:53:19,758 INFO L175 Difference]: Start difference. First operand has 378 places, 618 transitions, 8304 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:53:19,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 642 transitions, 9893 flow [2024-06-21 20:53:22,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 642 transitions, 9679 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:22,599 INFO L231 Difference]: Finished difference. Result has 380 places, 625 transitions, 8479 flow [2024-06-21 20:53:22,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8090, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8479, PETRI_PLACES=380, PETRI_TRANSITIONS=625} [2024-06-21 20:53:22,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-21 20:53:22,600 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 625 transitions, 8479 flow [2024-06-21 20:53:22,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:22,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:22,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:22,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:53:22,604 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)] === [2024-06-21 20:53:22,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash -122221017, now seen corresponding path program 10 times [2024-06-21 20:53:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:22,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145630861] [2024-06-21 20:53:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:23,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:23,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145630861] [2024-06-21 20:53:23,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145630861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:23,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:23,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:23,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700316732] [2024-06-21 20:53:23,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:23,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:23,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:23,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 625 transitions, 8479 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:23,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:23,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:23,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:25,389 INFO L124 PetriNetUnfolderBase]: 3428/5392 cut-off events. [2024-06-21 20:53:25,390 INFO L125 PetriNetUnfolderBase]: For 1210547/1210549 co-relation queries the response was YES. [2024-06-21 20:53:25,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65802 conditions, 5392 events. 3428/5392 cut-off events. For 1210547/1210549 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 31879 event pairs, 550 based on Foata normal form. 1/5380 useless extension candidates. Maximal degree in co-relation 65618. Up to 4925 conditions per place. [2024-06-21 20:53:25,470 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 586 selfloop transitions, 53 changer transitions 0/644 dead transitions. [2024-06-21 20:53:25,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 644 transitions, 9995 flow [2024-06-21 20:53:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:53:25,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:53:25,471 INFO L175 Difference]: Start difference. First operand has 380 places, 625 transitions, 8479 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:53:25,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 644 transitions, 9995 flow [2024-06-21 20:53:27,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 644 transitions, 9705 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:27,831 INFO L231 Difference]: Finished difference. Result has 382 places, 628 transitions, 8497 flow [2024-06-21 20:53:27,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8189, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8497, PETRI_PLACES=382, PETRI_TRANSITIONS=628} [2024-06-21 20:53:27,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-21 20:53:27,831 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 628 transitions, 8497 flow [2024-06-21 20:53:27,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:27,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:27,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:27,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:53:27,832 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)] === [2024-06-21 20:53:27,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:27,832 INFO L85 PathProgramCache]: Analyzing trace with hash -109096857, now seen corresponding path program 11 times [2024-06-21 20:53:27,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:27,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698615399] [2024-06-21 20:53:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:27,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:28,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:28,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698615399] [2024-06-21 20:53:28,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698615399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:28,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:28,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:28,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379490929] [2024-06-21 20:53:28,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:28,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:28,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:29,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:29,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 628 transitions, 8497 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:29,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:29,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:29,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:30,565 INFO L124 PetriNetUnfolderBase]: 3441/5414 cut-off events. [2024-06-21 20:53:30,565 INFO L125 PetriNetUnfolderBase]: For 1247199/1247201 co-relation queries the response was YES. [2024-06-21 20:53:30,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66613 conditions, 5414 events. 3441/5414 cut-off events. For 1247199/1247201 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 32041 event pairs, 550 based on Foata normal form. 1/5402 useless extension candidates. Maximal degree in co-relation 66428. Up to 4886 conditions per place. [2024-06-21 20:53:30,654 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 566 selfloop transitions, 82 changer transitions 0/653 dead transitions. [2024-06-21 20:53:30,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 653 transitions, 10493 flow [2024-06-21 20:53:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:53:30,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 20:53:30,655 INFO L175 Difference]: Start difference. First operand has 382 places, 628 transitions, 8497 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:53:30,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 653 transitions, 10493 flow [2024-06-21 20:53:33,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 653 transitions, 10207 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:33,293 INFO L231 Difference]: Finished difference. Result has 385 places, 636 transitions, 8823 flow [2024-06-21 20:53:33,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8211, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8823, PETRI_PLACES=385, PETRI_TRANSITIONS=636} [2024-06-21 20:53:33,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-21 20:53:33,294 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 636 transitions, 8823 flow [2024-06-21 20:53:33,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:33,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:33,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:33,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:53:33,294 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)] === [2024-06-21 20:53:33,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:33,295 INFO L85 PathProgramCache]: Analyzing trace with hash -109334007, now seen corresponding path program 12 times [2024-06-21 20:53:33,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:33,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972518782] [2024-06-21 20:53:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:33,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:34,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:34,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972518782] [2024-06-21 20:53:34,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972518782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:34,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:34,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:34,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768956652] [2024-06-21 20:53:34,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:34,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:34,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:34,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:34,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:34,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 636 transitions, 8823 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:34,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:34,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:34,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:35,983 INFO L124 PetriNetUnfolderBase]: 3438/5412 cut-off events. [2024-06-21 20:53:35,984 INFO L125 PetriNetUnfolderBase]: For 1261981/1261983 co-relation queries the response was YES. [2024-06-21 20:53:36,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66785 conditions, 5412 events. 3438/5412 cut-off events. For 1261981/1261983 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32082 event pairs, 550 based on Foata normal form. 1/5400 useless extension candidates. Maximal degree in co-relation 66598. Up to 4883 conditions per place. [2024-06-21 20:53:36,078 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 568 selfloop transitions, 80 changer transitions 0/653 dead transitions. [2024-06-21 20:53:36,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 653 transitions, 10210 flow [2024-06-21 20:53:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:53:36,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:53:36,079 INFO L175 Difference]: Start difference. First operand has 385 places, 636 transitions, 8823 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:53:36,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 653 transitions, 10210 flow [2024-06-21 20:53:38,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 653 transitions, 9734 flow, removed 198 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:38,872 INFO L231 Difference]: Finished difference. Result has 389 places, 637 transitions, 8556 flow [2024-06-21 20:53:38,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8379, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8556, PETRI_PLACES=389, PETRI_TRANSITIONS=637} [2024-06-21 20:53:38,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-21 20:53:38,873 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 637 transitions, 8556 flow [2024-06-21 20:53:38,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:38,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:38,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:38,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:53:38,874 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)] === [2024-06-21 20:53:38,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2019509074, now seen corresponding path program 7 times [2024-06-21 20:53:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:38,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161519861] [2024-06-21 20:53:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:38,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:39,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161519861] [2024-06-21 20:53:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161519861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:39,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181718670] [2024-06-21 20:53:39,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:39,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:39,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:39,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 637 transitions, 8556 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:39,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:39,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:39,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:41,381 INFO L124 PetriNetUnfolderBase]: 3490/5479 cut-off events. [2024-06-21 20:53:41,382 INFO L125 PetriNetUnfolderBase]: For 1330002/1330004 co-relation queries the response was YES. [2024-06-21 20:53:41,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68460 conditions, 5479 events. 3490/5479 cut-off events. For 1330002/1330004 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32479 event pairs, 549 based on Foata normal form. 4/5470 useless extension candidates. Maximal degree in co-relation 68271. Up to 4882 conditions per place. [2024-06-21 20:53:41,473 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 563 selfloop transitions, 105 changer transitions 0/673 dead transitions. [2024-06-21 20:53:41,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 673 transitions, 10802 flow [2024-06-21 20:53:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:53:41,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 20:53:41,475 INFO L175 Difference]: Start difference. First operand has 389 places, 637 transitions, 8556 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:53:41,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 673 transitions, 10802 flow [2024-06-21 20:53:44,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 673 transitions, 10650 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:44,651 INFO L231 Difference]: Finished difference. Result has 393 places, 651 transitions, 9211 flow [2024-06-21 20:53:44,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8404, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9211, PETRI_PLACES=393, PETRI_TRANSITIONS=651} [2024-06-21 20:53:44,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-21 20:53:44,652 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 651 transitions, 9211 flow [2024-06-21 20:53:44,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:44,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:44,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:53:44,661 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)] === [2024-06-21 20:53:44,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash -108888320, now seen corresponding path program 8 times [2024-06-21 20:53:44,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:44,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766788465] [2024-06-21 20:53:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:44,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:45,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:45,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766788465] [2024-06-21 20:53:45,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766788465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:45,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:45,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119590953] [2024-06-21 20:53:45,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:45,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:45,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:45,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:45,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 651 transitions, 9211 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:45,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:45,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:45,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:47,337 INFO L124 PetriNetUnfolderBase]: 3484/5482 cut-off events. [2024-06-21 20:53:47,337 INFO L125 PetriNetUnfolderBase]: For 1322600/1322602 co-relation queries the response was YES. [2024-06-21 20:53:47,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68586 conditions, 5482 events. 3484/5482 cut-off events. For 1322600/1322602 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32586 event pairs, 561 based on Foata normal form. 2/5481 useless extension candidates. Maximal degree in co-relation 68395. Up to 5146 conditions per place. [2024-06-21 20:53:47,428 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 636 selfloop transitions, 26 changer transitions 0/667 dead transitions. [2024-06-21 20:53:47,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 667 transitions, 10598 flow [2024-06-21 20:53:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 20:53:47,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:53:47,429 INFO L175 Difference]: Start difference. First operand has 393 places, 651 transitions, 9211 flow. Second operand 9 states and 153 transitions. [2024-06-21 20:53:47,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 667 transitions, 10598 flow [2024-06-21 20:53:51,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 667 transitions, 10182 flow, removed 114 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:51,023 INFO L231 Difference]: Finished difference. Result has 397 places, 653 transitions, 8892 flow [2024-06-21 20:53:51,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8795, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8892, PETRI_PLACES=397, PETRI_TRANSITIONS=653} [2024-06-21 20:53:51,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 20:53:51,024 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 653 transitions, 8892 flow [2024-06-21 20:53:51,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:51,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:51,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:51,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:53:51,024 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)] === [2024-06-21 20:53:51,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash 63966068, now seen corresponding path program 9 times [2024-06-21 20:53:51,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:51,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217599254] [2024-06-21 20:53:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:51,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:52,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:52,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217599254] [2024-06-21 20:53:52,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217599254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:52,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:52,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:52,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911538720] [2024-06-21 20:53:52,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:52,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:52,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:52,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:52,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 653 transitions, 8892 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:52,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:52,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:52,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:53,643 INFO L124 PetriNetUnfolderBase]: 3502/5508 cut-off events. [2024-06-21 20:53:53,644 INFO L125 PetriNetUnfolderBase]: For 1335867/1335872 co-relation queries the response was YES. [2024-06-21 20:53:53,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68540 conditions, 5508 events. 3502/5508 cut-off events. For 1335867/1335872 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32740 event pairs, 563 based on Foata normal form. 3/5507 useless extension candidates. Maximal degree in co-relation 68347. Up to 5091 conditions per place. [2024-06-21 20:53:53,736 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 602 selfloop transitions, 70 changer transitions 0/677 dead transitions. [2024-06-21 20:53:53,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 677 transitions, 10988 flow [2024-06-21 20:53:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:53:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:53:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 20:53:53,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:53:53,737 INFO L175 Difference]: Start difference. First operand has 397 places, 653 transitions, 8892 flow. Second operand 11 states and 187 transitions. [2024-06-21 20:53:53,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 677 transitions, 10988 flow [2024-06-21 20:53:57,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 677 transitions, 10829 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:57,481 INFO L231 Difference]: Finished difference. Result has 402 places, 662 transitions, 9107 flow [2024-06-21 20:53:57,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8733, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9107, PETRI_PLACES=402, PETRI_TRANSITIONS=662} [2024-06-21 20:53:57,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-21 20:53:57,482 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 662 transitions, 9107 flow [2024-06-21 20:53:57,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:57,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:57,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:57,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:53:57,482 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)] === [2024-06-21 20:53:57,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:57,483 INFO L85 PathProgramCache]: Analyzing trace with hash 508890356, now seen corresponding path program 10 times [2024-06-21 20:53:57,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:57,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411653673] [2024-06-21 20:53:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:57,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:58,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:58,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411653673] [2024-06-21 20:53:58,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411653673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:58,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:58,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:58,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713861231] [2024-06-21 20:53:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:58,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:58,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:58,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 662 transitions, 9107 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:58,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:58,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:58,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:00,215 INFO L124 PetriNetUnfolderBase]: 3508/5520 cut-off events. [2024-06-21 20:54:00,216 INFO L125 PetriNetUnfolderBase]: For 1359939/1359944 co-relation queries the response was YES. [2024-06-21 20:54:00,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68608 conditions, 5520 events. 3508/5520 cut-off events. For 1359939/1359944 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32879 event pairs, 564 based on Foata normal form. 6/5522 useless extension candidates. Maximal degree in co-relation 68414. Up to 5005 conditions per place. [2024-06-21 20:54:00,310 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 591 selfloop transitions, 84 changer transitions 0/680 dead transitions. [2024-06-21 20:54:00,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 680 transitions, 11077 flow [2024-06-21 20:54:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:54:00,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:54:00,311 INFO L175 Difference]: Start difference. First operand has 402 places, 662 transitions, 9107 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:54:00,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 680 transitions, 11077 flow [2024-06-21 20:54:04,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 680 transitions, 10814 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:04,069 INFO L231 Difference]: Finished difference. Result has 406 places, 667 transitions, 9322 flow [2024-06-21 20:54:04,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8844, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9322, PETRI_PLACES=406, PETRI_TRANSITIONS=667} [2024-06-21 20:54:04,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-21 20:54:04,070 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 667 transitions, 9322 flow [2024-06-21 20:54:04,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:04,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:04,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:04,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:54:04,070 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)] === [2024-06-21 20:54:04,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:04,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1324696210, now seen corresponding path program 11 times [2024-06-21 20:54:04,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:04,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046973074] [2024-06-21 20:54:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:05,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:05,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046973074] [2024-06-21 20:54:05,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046973074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:05,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:05,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:05,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24262584] [2024-06-21 20:54:05,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:05,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:05,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:05,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:05,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:05,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 667 transitions, 9322 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:05,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:05,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:05,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:06,842 INFO L124 PetriNetUnfolderBase]: 3528/5549 cut-off events. [2024-06-21 20:54:06,843 INFO L125 PetriNetUnfolderBase]: For 1386297/1386302 co-relation queries the response was YES. [2024-06-21 20:54:06,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69323 conditions, 5549 events. 3528/5549 cut-off events. For 1386297/1386302 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 32980 event pairs, 570 based on Foata normal form. 8/5544 useless extension candidates. Maximal degree in co-relation 69127. Up to 4919 conditions per place. [2024-06-21 20:54:06,951 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 591 selfloop transitions, 94 changer transitions 0/690 dead transitions. [2024-06-21 20:54:06,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 690 transitions, 11034 flow [2024-06-21 20:54:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:54:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:54:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 20:54:06,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-21 20:54:06,953 INFO L175 Difference]: Start difference. First operand has 406 places, 667 transitions, 9322 flow. Second operand 10 states and 173 transitions. [2024-06-21 20:54:06,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 690 transitions, 11034 flow [2024-06-21 20:54:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 690 transitions, 10613 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:11,047 INFO L231 Difference]: Finished difference. Result has 409 places, 674 transitions, 9378 flow [2024-06-21 20:54:11,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8901, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9378, PETRI_PLACES=409, PETRI_TRANSITIONS=674} [2024-06-21 20:54:11,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-21 20:54:11,052 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 674 transitions, 9378 flow [2024-06-21 20:54:11,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:11,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:11,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:11,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:54:11,053 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)] === [2024-06-21 20:54:11,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1324695993, now seen corresponding path program 13 times [2024-06-21 20:54:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:11,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401094658] [2024-06-21 20:54:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:11,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:12,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:12,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401094658] [2024-06-21 20:54:12,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401094658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:12,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:12,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640424193] [2024-06-21 20:54:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:12,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:12,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:12,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 674 transitions, 9378 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:12,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:12,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:12,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:13,771 INFO L124 PetriNetUnfolderBase]: 3533/5552 cut-off events. [2024-06-21 20:54:13,771 INFO L125 PetriNetUnfolderBase]: For 1382992/1382997 co-relation queries the response was YES. [2024-06-21 20:54:13,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69311 conditions, 5552 events. 3533/5552 cut-off events. For 1382992/1382997 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 33018 event pairs, 575 based on Foata normal form. 3/5541 useless extension candidates. Maximal degree in co-relation 69115. Up to 4935 conditions per place. [2024-06-21 20:54:13,866 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 598 selfloop transitions, 88 changer transitions 0/691 dead transitions. [2024-06-21 20:54:13,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 691 transitions, 11006 flow [2024-06-21 20:54:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 20:54:13,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 20:54:13,881 INFO L175 Difference]: Start difference. First operand has 409 places, 674 transitions, 9378 flow. Second operand 9 states and 158 transitions. [2024-06-21 20:54:13,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 691 transitions, 11006 flow [2024-06-21 20:54:17,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 691 transitions, 10628 flow, removed 99 selfloop flow, removed 8 redundant places. [2024-06-21 20:54:17,369 INFO L231 Difference]: Finished difference. Result has 410 places, 677 transitions, 9394 flow [2024-06-21 20:54:17,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9000, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9394, PETRI_PLACES=410, PETRI_TRANSITIONS=677} [2024-06-21 20:54:17,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-21 20:54:17,370 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 677 transitions, 9394 flow [2024-06-21 20:54:17,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:17,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:17,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:17,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:54:17,370 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)] === [2024-06-21 20:54:17,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:17,371 INFO L85 PathProgramCache]: Analyzing trace with hash -364280332, now seen corresponding path program 12 times [2024-06-21 20:54:17,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:17,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315810717] [2024-06-21 20:54:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:17,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:18,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315810717] [2024-06-21 20:54:18,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315810717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:18,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:18,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390271577] [2024-06-21 20:54:18,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:18,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:18,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:18,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 677 transitions, 9394 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:18,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:18,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:18,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:19,956 INFO L124 PetriNetUnfolderBase]: 3555/5582 cut-off events. [2024-06-21 20:54:19,957 INFO L125 PetriNetUnfolderBase]: For 1429961/1429966 co-relation queries the response was YES. [2024-06-21 20:54:20,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69904 conditions, 5582 events. 3555/5582 cut-off events. For 1429961/1429966 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33140 event pairs, 576 based on Foata normal form. 6/5574 useless extension candidates. Maximal degree in co-relation 69707. Up to 4050 conditions per place. [2024-06-21 20:54:20,053 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 389 selfloop transitions, 308 changer transitions 0/702 dead transitions. [2024-06-21 20:54:20,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 702 transitions, 12099 flow [2024-06-21 20:54:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:54:20,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 20:54:20,055 INFO L175 Difference]: Start difference. First operand has 410 places, 677 transitions, 9394 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:54:20,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 702 transitions, 12099 flow [2024-06-21 20:54:23,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 702 transitions, 11727 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:23,540 INFO L231 Difference]: Finished difference. Result has 413 places, 685 transitions, 10014 flow [2024-06-21 20:54:23,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9022, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10014, PETRI_PLACES=413, PETRI_TRANSITIONS=685} [2024-06-21 20:54:23,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-21 20:54:23,540 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 685 transitions, 10014 flow [2024-06-21 20:54:23,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:23,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:23,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:23,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:54:23,541 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)] === [2024-06-21 20:54:23,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash -364547459, now seen corresponding path program 14 times [2024-06-21 20:54:23,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:23,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250760934] [2024-06-21 20:54:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:23,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:24,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:24,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250760934] [2024-06-21 20:54:24,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250760934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:24,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:24,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:24,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670374467] [2024-06-21 20:54:24,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:24,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:24,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:24,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 685 transitions, 10014 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:24,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:24,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:24,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:26,378 INFO L124 PetriNetUnfolderBase]: 3589/5641 cut-off events. [2024-06-21 20:54:26,378 INFO L125 PetriNetUnfolderBase]: For 1473197/1473202 co-relation queries the response was YES. [2024-06-21 20:54:26,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72534 conditions, 5641 events. 3589/5641 cut-off events. For 1473197/1473202 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 33601 event pairs, 574 based on Foata normal form. 4/5631 useless extension candidates. Maximal degree in co-relation 72335. Up to 4673 conditions per place. [2024-06-21 20:54:26,478 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 538 selfloop transitions, 171 changer transitions 0/714 dead transitions. [2024-06-21 20:54:26,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 714 transitions, 12776 flow [2024-06-21 20:54:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:54:26,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:54:26,480 INFO L175 Difference]: Start difference. First operand has 413 places, 685 transitions, 10014 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:54:26,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 714 transitions, 12776 flow [2024-06-21 20:54:30,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 714 transitions, 12026 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:30,809 INFO L231 Difference]: Finished difference. Result has 417 places, 699 transitions, 10357 flow [2024-06-21 20:54:30,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9264, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10357, PETRI_PLACES=417, PETRI_TRANSITIONS=699} [2024-06-21 20:54:30,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-21 20:54:30,810 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 699 transitions, 10357 flow [2024-06-21 20:54:30,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:30,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:30,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:30,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:54:30,811 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)] === [2024-06-21 20:54:30,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 730511851, now seen corresponding path program 15 times [2024-06-21 20:54:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:30,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630841369] [2024-06-21 20:54:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:31,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:31,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630841369] [2024-06-21 20:54:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630841369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:31,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:31,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:31,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500695921] [2024-06-21 20:54:31,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:31,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:31,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:31,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:31,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:31,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:31,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 699 transitions, 10357 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:31,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:31,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:31,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:33,693 INFO L124 PetriNetUnfolderBase]: 3618/5683 cut-off events. [2024-06-21 20:54:33,694 INFO L125 PetriNetUnfolderBase]: For 1531007/1531012 co-relation queries the response was YES. [2024-06-21 20:54:33,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74211 conditions, 5683 events. 3618/5683 cut-off events. For 1531007/1531012 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33872 event pairs, 576 based on Foata normal form. 3/5672 useless extension candidates. Maximal degree in co-relation 74010. Up to 4985 conditions per place. [2024-06-21 20:54:33,790 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 603 selfloop transitions, 116 changer transitions 0/724 dead transitions. [2024-06-21 20:54:33,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 724 transitions, 13058 flow [2024-06-21 20:54:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:54:33,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:54:33,792 INFO L175 Difference]: Start difference. First operand has 417 places, 699 transitions, 10357 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:54:33,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 724 transitions, 13058 flow [2024-06-21 20:54:37,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 724 transitions, 12650 flow, removed 162 selfloop flow, removed 4 redundant places. [2024-06-21 20:54:37,713 INFO L231 Difference]: Finished difference. Result has 423 places, 709 transitions, 10935 flow [2024-06-21 20:54:37,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9991, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10935, PETRI_PLACES=423, PETRI_TRANSITIONS=709} [2024-06-21 20:54:37,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-21 20:54:37,714 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 709 transitions, 10935 flow [2024-06-21 20:54:37,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:37,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:37,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:37,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:54:37,715 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)] === [2024-06-21 20:54:37,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:37,715 INFO L85 PathProgramCache]: Analyzing trace with hash -364547242, now seen corresponding path program 13 times [2024-06-21 20:54:37,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:37,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416230283] [2024-06-21 20:54:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:37,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:38,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:38,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416230283] [2024-06-21 20:54:38,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416230283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:38,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:38,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916185406] [2024-06-21 20:54:38,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:38,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:38,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 709 transitions, 10935 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:38,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:38,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:38,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:40,395 INFO L124 PetriNetUnfolderBase]: 3630/5702 cut-off events. [2024-06-21 20:54:40,396 INFO L125 PetriNetUnfolderBase]: For 1561130/1561135 co-relation queries the response was YES. [2024-06-21 20:54:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74622 conditions, 5702 events. 3630/5702 cut-off events. For 1561130/1561135 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34070 event pairs, 578 based on Foata normal form. 6/5694 useless extension candidates. Maximal degree in co-relation 74418. Up to 4147 conditions per place. [2024-06-21 20:54:40,495 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 409 selfloop transitions, 318 changer transitions 0/732 dead transitions. [2024-06-21 20:54:40,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 732 transitions, 13369 flow [2024-06-21 20:54:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:54:40,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:54:40,497 INFO L175 Difference]: Start difference. First operand has 423 places, 709 transitions, 10935 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:54:40,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 732 transitions, 13369 flow [2024-06-21 20:54:44,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 732 transitions, 12953 flow, removed 130 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:44,747 INFO L231 Difference]: Finished difference. Result has 426 places, 715 transitions, 11381 flow [2024-06-21 20:54:44,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10523, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11381, PETRI_PLACES=426, PETRI_TRANSITIONS=715} [2024-06-21 20:54:44,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-21 20:54:44,748 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 715 transitions, 11381 flow [2024-06-21 20:54:44,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:44,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:44,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:44,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:54:44,749 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)] === [2024-06-21 20:54:44,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash 730957538, now seen corresponding path program 14 times [2024-06-21 20:54:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917661117] [2024-06-21 20:54:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:45,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:45,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917661117] [2024-06-21 20:54:45,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917661117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:45,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:45,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009590616] [2024-06-21 20:54:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:45,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:45,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:45,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 715 transitions, 11381 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:45,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:45,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:45,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:47,571 INFO L124 PetriNetUnfolderBase]: 3632/5702 cut-off events. [2024-06-21 20:54:47,572 INFO L125 PetriNetUnfolderBase]: For 1559675/1559680 co-relation queries the response was YES. [2024-06-21 20:54:47,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75158 conditions, 5702 events. 3632/5702 cut-off events. For 1559675/1559680 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34038 event pairs, 563 based on Foata normal form. 6/5704 useless extension candidates. Maximal degree in co-relation 74954. Up to 5328 conditions per place. [2024-06-21 20:54:47,679 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 689 selfloop transitions, 39 changer transitions 0/733 dead transitions. [2024-06-21 20:54:47,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 733 transitions, 13158 flow [2024-06-21 20:54:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 20:54:47,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 20:54:47,680 INFO L175 Difference]: Start difference. First operand has 426 places, 715 transitions, 11381 flow. Second operand 9 states and 155 transitions. [2024-06-21 20:54:47,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 733 transitions, 13158 flow [2024-06-21 20:54:51,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 733 transitions, 12442 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:51,950 INFO L231 Difference]: Finished difference. Result has 429 places, 721 transitions, 11041 flow [2024-06-21 20:54:51,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10669, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11041, PETRI_PLACES=429, PETRI_TRANSITIONS=721} [2024-06-21 20:54:51,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-21 20:54:51,951 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 721 transitions, 11041 flow [2024-06-21 20:54:51,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:51,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:51,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:51,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:54:51,952 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)] === [2024-06-21 20:54:51,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1337583220, now seen corresponding path program 15 times [2024-06-21 20:54:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:51,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659398893] [2024-06-21 20:54:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:51,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:53,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:53,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659398893] [2024-06-21 20:54:53,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659398893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:53,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:53,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:53,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385326570] [2024-06-21 20:54:53,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:53,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:53,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:53,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:53,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:53,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:53,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 721 transitions, 11041 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:53,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:53,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:53,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:54,732 INFO L124 PetriNetUnfolderBase]: 3672/5758 cut-off events. [2024-06-21 20:54:54,732 INFO L125 PetriNetUnfolderBase]: For 1606395/1606400 co-relation queries the response was YES. [2024-06-21 20:54:54,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75423 conditions, 5758 events. 3672/5758 cut-off events. For 1606395/1606400 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34408 event pairs, 575 based on Foata normal form. 6/5750 useless extension candidates. Maximal degree in co-relation 75218. Up to 4975 conditions per place. [2024-06-21 20:54:54,837 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 605 selfloop transitions, 143 changer transitions 0/753 dead transitions. [2024-06-21 20:54:54,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 753 transitions, 13423 flow [2024-06-21 20:54:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:54:54,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 20:54:54,838 INFO L175 Difference]: Start difference. First operand has 429 places, 721 transitions, 11041 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:54:54,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 753 transitions, 13423 flow [2024-06-21 20:54:59,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 753 transitions, 13082 flow, removed 125 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:59,220 INFO L231 Difference]: Finished difference. Result has 432 places, 735 transitions, 11592 flow [2024-06-21 20:54:59,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10700, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11592, PETRI_PLACES=432, PETRI_TRANSITIONS=735} [2024-06-21 20:54:59,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 20:54:59,221 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 735 transitions, 11592 flow [2024-06-21 20:54:59,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:59,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:59,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:59,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:54:59,221 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)] === [2024-06-21 20:54:59,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:59,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1337820153, now seen corresponding path program 16 times [2024-06-21 20:54:59,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:59,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422205360] [2024-06-21 20:54:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:59,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:00,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:00,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422205360] [2024-06-21 20:55:00,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422205360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:00,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:00,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:00,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617922673] [2024-06-21 20:55:00,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:00,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:00,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:55:00,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 735 transitions, 11592 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:00,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:00,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:55:00,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:02,490 INFO L124 PetriNetUnfolderBase]: 3669/5754 cut-off events. [2024-06-21 20:55:02,491 INFO L125 PetriNetUnfolderBase]: For 1590475/1590480 co-relation queries the response was YES. [2024-06-21 20:55:02,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75696 conditions, 5754 events. 3669/5754 cut-off events. For 1590475/1590480 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34331 event pairs, 575 based on Foata normal form. 3/5743 useless extension candidates. Maximal degree in co-relation 75489. Up to 5057 conditions per place. [2024-06-21 20:55:02,592 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 625 selfloop transitions, 119 changer transitions 0/749 dead transitions. [2024-06-21 20:55:02,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 749 transitions, 13388 flow [2024-06-21 20:55:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:55:02,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:55:02,593 INFO L175 Difference]: Start difference. First operand has 432 places, 735 transitions, 11592 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:55:02,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 749 transitions, 13388 flow [2024-06-21 20:55:07,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 749 transitions, 12800 flow, removed 181 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:07,041 INFO L231 Difference]: Finished difference. Result has 435 places, 735 transitions, 11248 flow [2024-06-21 20:55:07,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11004, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11248, PETRI_PLACES=435, PETRI_TRANSITIONS=735} [2024-06-21 20:55:07,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-21 20:55:07,042 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 735 transitions, 11248 flow [2024-06-21 20:55:07,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:07,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:07,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:07,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:55:07,042 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)] === [2024-06-21 20:55:07,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash 128586386, now seen corresponding path program 16 times [2024-06-21 20:55:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:07,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120774114] [2024-06-21 20:55:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:07,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120774114] [2024-06-21 20:55:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120774114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:08,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:08,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:08,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466854481] [2024-06-21 20:55:08,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:08,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:08,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:08,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:08,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:55:08,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 735 transitions, 11248 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:08,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:55:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:09,698 INFO L124 PetriNetUnfolderBase]: 3643/5716 cut-off events. [2024-06-21 20:55:09,698 INFO L125 PetriNetUnfolderBase]: For 1595186/1595191 co-relation queries the response was YES. [2024-06-21 20:55:09,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73771 conditions, 5716 events. 3643/5716 cut-off events. For 1595186/1595191 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34081 event pairs, 571 based on Foata normal form. 10/5712 useless extension candidates. Maximal degree in co-relation 73563. Up to 5062 conditions per place. [2024-06-21 20:55:09,798 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 653 selfloop transitions, 90 changer transitions 0/748 dead transitions. [2024-06-21 20:55:09,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 748 transitions, 12786 flow [2024-06-21 20:55:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:55:09,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 20:55:09,800 INFO L175 Difference]: Start difference. First operand has 435 places, 735 transitions, 11248 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:55:09,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 748 transitions, 12786 flow [2024-06-21 20:55:14,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 748 transitions, 12332 flow, removed 116 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:14,548 INFO L231 Difference]: Finished difference. Result has 437 places, 735 transitions, 10986 flow [2024-06-21 20:55:14,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10794, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10986, PETRI_PLACES=437, PETRI_TRANSITIONS=735} [2024-06-21 20:55:14,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-21 20:55:14,549 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 735 transitions, 10986 flow [2024-06-21 20:55:14,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:14,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:14,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:14,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:55:14,550 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)] === [2024-06-21 20:55:14,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1292154879, now seen corresponding path program 17 times [2024-06-21 20:55:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:14,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255216471] [2024-06-21 20:55:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:15,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:15,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255216471] [2024-06-21 20:55:15,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255216471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:15,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:15,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603902881] [2024-06-21 20:55:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:15,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:15,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:15,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:55:15,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 735 transitions, 10986 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:15,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:15,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:55:15,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:17,516 INFO L124 PetriNetUnfolderBase]: 3637/5710 cut-off events. [2024-06-21 20:55:17,516 INFO L125 PetriNetUnfolderBase]: For 1538239/1538244 co-relation queries the response was YES. [2024-06-21 20:55:17,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72949 conditions, 5710 events. 3637/5710 cut-off events. For 1538239/1538244 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34062 event pairs, 573 based on Foata normal form. 4/5700 useless extension candidates. Maximal degree in co-relation 72740. Up to 5072 conditions per place. [2024-06-21 20:55:17,618 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 658 selfloop transitions, 85 changer transitions 0/748 dead transitions. [2024-06-21 20:55:17,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 748 transitions, 12551 flow [2024-06-21 20:55:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:55:17,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:55:17,619 INFO L175 Difference]: Start difference. First operand has 437 places, 735 transitions, 10986 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:55:17,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 748 transitions, 12551 flow [2024-06-21 20:55:21,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 748 transitions, 12091 flow, removed 119 selfloop flow, removed 8 redundant places. [2024-06-21 20:55:21,998 INFO L231 Difference]: Finished difference. Result has 438 places, 736 transitions, 10748 flow [2024-06-21 20:55:21,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10554, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10748, PETRI_PLACES=438, PETRI_TRANSITIONS=736} [2024-06-21 20:55:21,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-21 20:55:21,999 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 736 transitions, 10748 flow [2024-06-21 20:55:21,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:21,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:21,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:21,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:55:22,000 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)] === [2024-06-21 20:55:22,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash -187415722, now seen corresponding path program 17 times [2024-06-21 20:55:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:22,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152788580] [2024-06-21 20:55:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:22,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:23,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:23,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152788580] [2024-06-21 20:55:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152788580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:23,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:23,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:23,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863352575] [2024-06-21 20:55:23,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:23,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:23,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:23,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:23,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:23,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:55:23,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 736 transitions, 10748 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:23,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:23,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:55:23,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:24,850 INFO L124 PetriNetUnfolderBase]: 3635/5704 cut-off events. [2024-06-21 20:55:24,850 INFO L125 PetriNetUnfolderBase]: For 1542620/1542625 co-relation queries the response was YES. [2024-06-21 20:55:24,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72539 conditions, 5704 events. 3635/5704 cut-off events. For 1542620/1542625 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33987 event pairs, 569 based on Foata normal form. 4/5694 useless extension candidates. Maximal degree in co-relation 72329. Up to 4150 conditions per place. [2024-06-21 20:55:24,952 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 389 selfloop transitions, 370 changer transitions 0/764 dead transitions. [2024-06-21 20:55:24,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 764 transitions, 13606 flow [2024-06-21 20:55:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:55:24,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 20:55:24,953 INFO L175 Difference]: Start difference. First operand has 438 places, 736 transitions, 10748 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:55:24,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 764 transitions, 13606 flow [2024-06-21 20:55:29,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 764 transitions, 13415 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:29,749 INFO L231 Difference]: Finished difference. Result has 442 places, 745 transitions, 12003 flow [2024-06-21 20:55:29,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10557, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12003, PETRI_PLACES=442, PETRI_TRANSITIONS=745} [2024-06-21 20:55:29,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-21 20:55:29,761 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 745 transitions, 12003 flow [2024-06-21 20:55:29,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:29,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:29,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:29,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:55:29,762 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)] === [2024-06-21 20:55:29,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:29,762 INFO L85 PathProgramCache]: Analyzing trace with hash 136204946, now seen corresponding path program 18 times [2024-06-21 20:55:29,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:29,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613970404] [2024-06-21 20:55:29,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:29,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:30,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:30,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613970404] [2024-06-21 20:55:30,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613970404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:30,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:30,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:30,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870355189] [2024-06-21 20:55:30,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:30,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:30,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:31,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:55:31,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 745 transitions, 12003 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:31,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:31,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:55:31,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:32,639 INFO L124 PetriNetUnfolderBase]: 3657/5737 cut-off events. [2024-06-21 20:55:32,639 INFO L125 PetriNetUnfolderBase]: For 1585379/1585384 co-relation queries the response was YES. [2024-06-21 20:55:32,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74958 conditions, 5737 events. 3657/5737 cut-off events. For 1585379/1585384 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34188 event pairs, 574 based on Foata normal form. 6/5729 useless extension candidates. Maximal degree in co-relation 74745. Up to 4864 conditions per place. [2024-06-21 20:55:32,747 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 607 selfloop transitions, 153 changer transitions 0/765 dead transitions. [2024-06-21 20:55:32,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 765 transitions, 14102 flow [2024-06-21 20:55:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:55:32,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 20:55:32,749 INFO L175 Difference]: Start difference. First operand has 442 places, 745 transitions, 12003 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:55:32,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 765 transitions, 14102 flow [2024-06-21 20:55:38,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 765 transitions, 13520 flow, removed 112 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:38,259 INFO L231 Difference]: Finished difference. Result has 447 places, 752 transitions, 12008 flow [2024-06-21 20:55:38,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11442, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12008, PETRI_PLACES=447, PETRI_TRANSITIONS=752} [2024-06-21 20:55:38,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-21 20:55:38,259 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 752 transitions, 12008 flow [2024-06-21 20:55:38,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:38,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:38,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:38,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:55:38,260 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)] === [2024-06-21 20:55:38,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:38,261 INFO L85 PathProgramCache]: Analyzing trace with hash -187415939, now seen corresponding path program 18 times [2024-06-21 20:55:38,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:38,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813884485] [2024-06-21 20:55:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:38,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:39,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:39,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813884485] [2024-06-21 20:55:39,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813884485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:39,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:39,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:39,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064489830] [2024-06-21 20:55:39,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:39,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:39,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:39,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:55:39,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 752 transitions, 12008 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:39,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:39,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:55:39,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:41,527 INFO L124 PetriNetUnfolderBase]: 3670/5757 cut-off events. [2024-06-21 20:55:41,527 INFO L125 PetriNetUnfolderBase]: For 1593461/1593466 co-relation queries the response was YES. [2024-06-21 20:55:41,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75025 conditions, 5757 events. 3670/5757 cut-off events. For 1593461/1593466 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 34353 event pairs, 574 based on Foata normal form. 3/5746 useless extension candidates. Maximal degree in co-relation 74811. Up to 4772 conditions per place. [2024-06-21 20:55:41,628 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 574 selfloop transitions, 197 changer transitions 0/776 dead transitions. [2024-06-21 20:55:41,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 776 transitions, 15091 flow [2024-06-21 20:55:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:55:41,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:55:41,630 INFO L175 Difference]: Start difference. First operand has 447 places, 752 transitions, 12008 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:55:41,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 776 transitions, 15091 flow [2024-06-21 20:55:47,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 776 transitions, 14621 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:47,121 INFO L231 Difference]: Finished difference. Result has 449 places, 762 transitions, 12621 flow [2024-06-21 20:55:47,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11538, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12621, PETRI_PLACES=449, PETRI_TRANSITIONS=762} [2024-06-21 20:55:47,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-21 20:55:47,122 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 762 transitions, 12621 flow [2024-06-21 20:55:47,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:47,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:47,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:47,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:55:47,123 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:47,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:47,123 INFO L85 PathProgramCache]: Analyzing trace with hash -187402702, now seen corresponding path program 19 times [2024-06-21 20:55:47,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:47,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237919687] [2024-06-21 20:55:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:48,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:48,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237919687] [2024-06-21 20:55:48,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237919687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:48,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:48,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:48,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613981834] [2024-06-21 20:55:48,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:48,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:48,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:48,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:55:48,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 762 transitions, 12621 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:48,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:48,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:55:48,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:49,990 INFO L124 PetriNetUnfolderBase]: 3675/5765 cut-off events. [2024-06-21 20:55:49,990 INFO L125 PetriNetUnfolderBase]: For 1613843/1613848 co-relation queries the response was YES. [2024-06-21 20:55:50,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74924 conditions, 5765 events. 3675/5765 cut-off events. For 1613843/1613848 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34415 event pairs, 562 based on Foata normal form. 4/5765 useless extension candidates. Maximal degree in co-relation 74710. Up to 5353 conditions per place. [2024-06-21 20:55:50,101 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 710 selfloop transitions, 65 changer transitions 0/780 dead transitions. [2024-06-21 20:55:50,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 780 transitions, 14383 flow [2024-06-21 20:55:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 20:55:50,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 20:55:50,102 INFO L175 Difference]: Start difference. First operand has 449 places, 762 transitions, 12621 flow. Second operand 9 states and 157 transitions. [2024-06-21 20:55:50,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 780 transitions, 14383 flow [2024-06-21 20:55:55,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 780 transitions, 13963 flow, removed 171 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:55,973 INFO L231 Difference]: Finished difference. Result has 455 places, 768 transitions, 12520 flow [2024-06-21 20:55:55,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12209, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12520, PETRI_PLACES=455, PETRI_TRANSITIONS=768} [2024-06-21 20:55:55,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-21 20:55:55,974 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 768 transitions, 12520 flow [2024-06-21 20:55:55,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:55,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:55,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:55,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:55:55,975 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:55,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:55,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1299506746, now seen corresponding path program 20 times [2024-06-21 20:55:55,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:55,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222027642] [2024-06-21 20:55:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:55,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:56,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222027642] [2024-06-21 20:55:56,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222027642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:56,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:56,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:56,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192526989] [2024-06-21 20:55:56,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:56,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:57,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:55:57,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 768 transitions, 12520 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:57,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:57,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:55:57,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:58,730 INFO L124 PetriNetUnfolderBase]: 3661/5749 cut-off events. [2024-06-21 20:55:58,730 INFO L125 PetriNetUnfolderBase]: For 1595767/1595772 co-relation queries the response was YES. [2024-06-21 20:55:58,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73896 conditions, 5749 events. 3661/5749 cut-off events. For 1595767/1595772 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34486 event pairs, 572 based on Foata normal form. 6/5741 useless extension candidates. Maximal degree in co-relation 73680. Up to 4879 conditions per place. [2024-06-21 20:55:58,843 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 624 selfloop transitions, 153 changer transitions 0/782 dead transitions. [2024-06-21 20:55:58,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 782 transitions, 14414 flow [2024-06-21 20:55:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:55:58,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 20:55:58,844 INFO L175 Difference]: Start difference. First operand has 455 places, 768 transitions, 12520 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:55:58,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 782 transitions, 14414 flow [2024-06-21 20:56:05,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 782 transitions, 14023 flow, removed 135 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:05,033 INFO L231 Difference]: Finished difference. Result has 458 places, 768 transitions, 12453 flow [2024-06-21 20:56:05,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12137, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12453, PETRI_PLACES=458, PETRI_TRANSITIONS=768} [2024-06-21 20:56:05,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-21 20:56:05,034 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 768 transitions, 12453 flow [2024-06-21 20:56:05,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:05,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:05,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:05,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:56:05,035 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:05,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:05,035 INFO L85 PathProgramCache]: Analyzing trace with hash -187178789, now seen corresponding path program 19 times [2024-06-21 20:56:05,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:05,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833757691] [2024-06-21 20:56:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:05,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:06,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:06,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833757691] [2024-06-21 20:56:06,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833757691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:06,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:06,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:06,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859736545] [2024-06-21 20:56:06,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:06,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:06,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:06,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:06,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:06,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:06,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 768 transitions, 12453 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:06,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:06,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:06,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:08,580 INFO L124 PetriNetUnfolderBase]: 3658/5742 cut-off events. [2024-06-21 20:56:08,581 INFO L125 PetriNetUnfolderBase]: For 1581619/1581624 co-relation queries the response was YES. [2024-06-21 20:56:08,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73855 conditions, 5742 events. 3658/5742 cut-off events. For 1581619/1581624 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 34366 event pairs, 602 based on Foata normal form. 1/5728 useless extension candidates. Maximal degree in co-relation 73638. Up to 4583 conditions per place. [2024-06-21 20:56:08,684 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 522 selfloop transitions, 257 changer transitions 0/784 dead transitions. [2024-06-21 20:56:08,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 784 transitions, 14781 flow [2024-06-21 20:56:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:56:08,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:56:08,686 INFO L175 Difference]: Start difference. First operand has 458 places, 768 transitions, 12453 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:56:08,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 784 transitions, 14781 flow [2024-06-21 20:56:14,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 784 transitions, 14285 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:14,485 INFO L231 Difference]: Finished difference. Result has 461 places, 771 transitions, 12811 flow [2024-06-21 20:56:14,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11957, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12811, PETRI_PLACES=461, PETRI_TRANSITIONS=771} [2024-06-21 20:56:14,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-21 20:56:14,486 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 771 transitions, 12811 flow [2024-06-21 20:56:14,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:14,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:14,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:14,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:56:14,487 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:14,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash 135937819, now seen corresponding path program 20 times [2024-06-21 20:56:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710884418] [2024-06-21 20:56:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:15,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710884418] [2024-06-21 20:56:15,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710884418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:15,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:15,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:15,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597960416] [2024-06-21 20:56:15,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:15,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:15,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:15,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:15,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 771 transitions, 12811 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:15,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:15,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:15,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:17,527 INFO L124 PetriNetUnfolderBase]: 3652/5733 cut-off events. [2024-06-21 20:56:17,528 INFO L125 PetriNetUnfolderBase]: For 1598628/1598633 co-relation queries the response was YES. [2024-06-21 20:56:17,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74282 conditions, 5733 events. 3652/5733 cut-off events. For 1598628/1598633 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34280 event pairs, 572 based on Foata normal form. 4/5723 useless extension candidates. Maximal degree in co-relation 74063. Up to 5017 conditions per place. [2024-06-21 20:56:17,638 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 671 selfloop transitions, 108 changer transitions 0/784 dead transitions. [2024-06-21 20:56:17,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 784 transitions, 14726 flow [2024-06-21 20:56:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:56:17,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:56:17,640 INFO L175 Difference]: Start difference. First operand has 461 places, 771 transitions, 12811 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:56:17,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 784 transitions, 14726 flow [2024-06-21 20:56:24,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 784 transitions, 14088 flow, removed 132 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:24,186 INFO L231 Difference]: Finished difference. Result has 463 places, 772 transitions, 12443 flow [2024-06-21 20:56:24,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12208, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12443, PETRI_PLACES=463, PETRI_TRANSITIONS=772} [2024-06-21 20:56:24,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-21 20:56:24,187 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 772 transitions, 12443 flow [2024-06-21 20:56:24,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:24,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:24,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:24,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:56:24,188 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:24,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:24,188 INFO L85 PathProgramCache]: Analyzing trace with hash -364670591, now seen corresponding path program 7 times [2024-06-21 20:56:24,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:24,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712098334] [2024-06-21 20:56:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:24,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:25,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:25,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712098334] [2024-06-21 20:56:25,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712098334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:25,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:25,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:25,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987983636] [2024-06-21 20:56:25,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:25,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:25,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:25,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:25,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:25,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:25,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 772 transitions, 12443 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:25,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:25,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:25,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:27,132 INFO L124 PetriNetUnfolderBase]: 3696/5801 cut-off events. [2024-06-21 20:56:27,132 INFO L125 PetriNetUnfolderBase]: For 1721220/1721225 co-relation queries the response was YES. [2024-06-21 20:56:27,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74964 conditions, 5801 events. 3696/5801 cut-off events. For 1721220/1721225 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 34712 event pairs, 576 based on Foata normal form. 14/5801 useless extension candidates. Maximal degree in co-relation 74745. Up to 4899 conditions per place. [2024-06-21 20:56:27,246 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 626 selfloop transitions, 159 changer transitions 0/790 dead transitions. [2024-06-21 20:56:27,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 790 transitions, 14381 flow [2024-06-21 20:56:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:56:27,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 20:56:27,247 INFO L175 Difference]: Start difference. First operand has 463 places, 772 transitions, 12443 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:56:27,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 790 transitions, 14381 flow [2024-06-21 20:56:33,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 790 transitions, 14174 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:33,635 INFO L231 Difference]: Finished difference. Result has 466 places, 775 transitions, 12771 flow [2024-06-21 20:56:33,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12236, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12771, PETRI_PLACES=466, PETRI_TRANSITIONS=775} [2024-06-21 20:56:33,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-21 20:56:33,635 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 775 transitions, 12771 flow [2024-06-21 20:56:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:33,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:33,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:33,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:56:33,636 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:33,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash 125089927, now seen corresponding path program 8 times [2024-06-21 20:56:33,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:33,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599292612] [2024-06-21 20:56:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:33,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:34,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:34,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599292612] [2024-06-21 20:56:34,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599292612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:34,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:34,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324780106] [2024-06-21 20:56:34,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:34,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:34,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:34,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 775 transitions, 12771 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:34,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:34,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:34,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:36,669 INFO L124 PetriNetUnfolderBase]: 3740/5863 cut-off events. [2024-06-21 20:56:36,669 INFO L125 PetriNetUnfolderBase]: For 1757472/1757477 co-relation queries the response was YES. [2024-06-21 20:56:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76787 conditions, 5863 events. 3740/5863 cut-off events. For 1757472/1757477 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 35067 event pairs, 580 based on Foata normal form. 14/5863 useless extension candidates. Maximal degree in co-relation 76567. Up to 5195 conditions per place. [2024-06-21 20:56:36,781 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 703 selfloop transitions, 86 changer transitions 0/794 dead transitions. [2024-06-21 20:56:36,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 794 transitions, 14733 flow [2024-06-21 20:56:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:56:36,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:56:36,783 INFO L175 Difference]: Start difference. First operand has 466 places, 775 transitions, 12771 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:56:36,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 794 transitions, 14733 flow [2024-06-21 20:56:43,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 794 transitions, 14278 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:43,327 INFO L231 Difference]: Finished difference. Result has 468 places, 778 transitions, 12711 flow [2024-06-21 20:56:43,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12316, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12711, PETRI_PLACES=468, PETRI_TRANSITIONS=778} [2024-06-21 20:56:43,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-21 20:56:43,328 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 778 transitions, 12711 flow [2024-06-21 20:56:43,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:43,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:43,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:43,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:56:43,329 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:43,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:43,329 INFO L85 PathProgramCache]: Analyzing trace with hash -937818779, now seen corresponding path program 9 times [2024-06-21 20:56:43,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124655168] [2024-06-21 20:56:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:43,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:44,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:44,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124655168] [2024-06-21 20:56:44,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124655168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:44,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:44,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:44,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581853866] [2024-06-21 20:56:44,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:44,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:44,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:44,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:44,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:44,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:44,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 778 transitions, 12711 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:44,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:44,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:44,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:46,496 INFO L124 PetriNetUnfolderBase]: 3784/5933 cut-off events. [2024-06-21 20:56:46,497 INFO L125 PetriNetUnfolderBase]: For 1782600/1782605 co-relation queries the response was YES. [2024-06-21 20:56:46,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77738 conditions, 5933 events. 3784/5933 cut-off events. For 1782600/1782605 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35630 event pairs, 578 based on Foata normal form. 14/5933 useless extension candidates. Maximal degree in co-relation 77517. Up to 5208 conditions per place. [2024-06-21 20:56:46,609 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 714 selfloop transitions, 83 changer transitions 0/802 dead transitions. [2024-06-21 20:56:46,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 802 transitions, 14895 flow [2024-06-21 20:56:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:56:46,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 20:56:46,610 INFO L175 Difference]: Start difference. First operand has 468 places, 778 transitions, 12711 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:56:46,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 802 transitions, 14895 flow [2024-06-21 20:56:54,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 802 transitions, 14580 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:54,044 INFO L231 Difference]: Finished difference. Result has 470 places, 781 transitions, 12790 flow [2024-06-21 20:56:54,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12396, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12790, PETRI_PLACES=470, PETRI_TRANSITIONS=781} [2024-06-21 20:56:54,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-21 20:56:54,045 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 781 transitions, 12790 flow [2024-06-21 20:56:54,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:54,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:54,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:54,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:56:54,045 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:54,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:54,046 INFO L85 PathProgramCache]: Analyzing trace with hash 135814687, now seen corresponding path program 10 times [2024-06-21 20:56:54,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:54,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886925339] [2024-06-21 20:56:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:54,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:55,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:55,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886925339] [2024-06-21 20:56:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886925339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:55,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:55,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602208384] [2024-06-21 20:56:55,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:55,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:55,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 781 transitions, 12790 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:55,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:55,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:55,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:57,200 INFO L124 PetriNetUnfolderBase]: 3828/6005 cut-off events. [2024-06-21 20:56:57,200 INFO L125 PetriNetUnfolderBase]: For 1820266/1820271 co-relation queries the response was YES. [2024-06-21 20:56:57,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78959 conditions, 6005 events. 3828/6005 cut-off events. For 1820266/1820271 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36153 event pairs, 604 based on Foata normal form. 14/6005 useless extension candidates. Maximal degree in co-relation 78737. Up to 5277 conditions per place. [2024-06-21 20:56:57,315 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 690 selfloop transitions, 104 changer transitions 0/799 dead transitions. [2024-06-21 20:56:57,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 799 transitions, 14764 flow [2024-06-21 20:56:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:56:57,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 20:56:57,317 INFO L175 Difference]: Start difference. First operand has 470 places, 781 transitions, 12790 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:56:57,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 799 transitions, 14764 flow [2024-06-21 20:57:04,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 799 transitions, 14448 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-21 20:57:04,611 INFO L231 Difference]: Finished difference. Result has 472 places, 784 transitions, 12917 flow [2024-06-21 20:57:04,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12474, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12917, PETRI_PLACES=472, PETRI_TRANSITIONS=784} [2024-06-21 20:57:04,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-21 20:57:04,611 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 784 transitions, 12917 flow [2024-06-21 20:57:04,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:04,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:04,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:04,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:57:04,612 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:04,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:04,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1672916316, now seen corresponding path program 2 times [2024-06-21 20:57:04,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:04,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942235576] [2024-06-21 20:57:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:04,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:06,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942235576] [2024-06-21 20:57:06,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942235576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:06,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:06,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:57:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500439399] [2024-06-21 20:57:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:57:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:57:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:57:06,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:57:06,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 784 transitions, 12917 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:06,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:06,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:57:06,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:08,337 INFO L124 PetriNetUnfolderBase]: 3849/6031 cut-off events. [2024-06-21 20:57:08,337 INFO L125 PetriNetUnfolderBase]: For 1772158/1772160 co-relation queries the response was YES. [2024-06-21 20:57:08,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80167 conditions, 6031 events. 3849/6031 cut-off events. For 1772158/1772160 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 36248 event pairs, 591 based on Foata normal form. 2/6030 useless extension candidates. Maximal degree in co-relation 79944. Up to 5676 conditions per place. [2024-06-21 20:57:08,451 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 770 selfloop transitions, 29 changer transitions 0/804 dead transitions. [2024-06-21 20:57:08,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 804 transitions, 15237 flow [2024-06-21 20:57:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:57:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:57:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-21 20:57:08,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-21 20:57:08,453 INFO L175 Difference]: Start difference. First operand has 472 places, 784 transitions, 12917 flow. Second operand 11 states and 177 transitions. [2024-06-21 20:57:08,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 804 transitions, 15237 flow [2024-06-21 20:57:15,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 804 transitions, 14874 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-21 20:57:15,348 INFO L231 Difference]: Finished difference. Result has 476 places, 788 transitions, 13013 flow [2024-06-21 20:57:15,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12554, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13013, PETRI_PLACES=476, PETRI_TRANSITIONS=788} [2024-06-21 20:57:15,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-21 20:57:15,349 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 788 transitions, 13013 flow [2024-06-21 20:57:15,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:15,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:15,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:15,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:57:15,350 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:15,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash 78558388, now seen corresponding path program 3 times [2024-06-21 20:57:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857570818] [2024-06-21 20:57:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:17,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:17,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857570818] [2024-06-21 20:57:17,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857570818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:17,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:17,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:57:17,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233360292] [2024-06-21 20:57:17,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:57:17,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:57:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:57:17,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:57:17,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 788 transitions, 13013 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:17,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:17,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:57:17,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:19,776 INFO L124 PetriNetUnfolderBase]: 3844/6028 cut-off events. [2024-06-21 20:57:19,776 INFO L125 PetriNetUnfolderBase]: For 1760137/1760139 co-relation queries the response was YES. [2024-06-21 20:57:19,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79009 conditions, 6028 events. 3844/6028 cut-off events. For 1760137/1760139 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 36324 event pairs, 592 based on Foata normal form. 2/6027 useless extension candidates. Maximal degree in co-relation 78785. Up to 5686 conditions per place. [2024-06-21 20:57:19,890 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 771 selfloop transitions, 26 changer transitions 0/802 dead transitions. [2024-06-21 20:57:19,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 802 transitions, 14639 flow [2024-06-21 20:57:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:57:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:57:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 20:57:19,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858093126385809 [2024-06-21 20:57:19,892 INFO L175 Difference]: Start difference. First operand has 476 places, 788 transitions, 13013 flow. Second operand 11 states and 174 transitions. [2024-06-21 20:57:19,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 802 transitions, 14639 flow [2024-06-21 20:57:26,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 802 transitions, 14227 flow, removed 191 selfloop flow, removed 7 redundant places. [2024-06-21 20:57:26,368 INFO L231 Difference]: Finished difference. Result has 480 places, 788 transitions, 12658 flow [2024-06-21 20:57:26,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12601, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12658, PETRI_PLACES=480, PETRI_TRANSITIONS=788} [2024-06-21 20:57:26,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-21 20:57:26,369 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 788 transitions, 12658 flow [2024-06-21 20:57:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:26,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:26,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:26,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:57:26,370 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:26,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1426852688, now seen corresponding path program 4 times [2024-06-21 20:57:26,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:26,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084584509] [2024-06-21 20:57:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:26,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:28,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:28,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084584509] [2024-06-21 20:57:28,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084584509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:28,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:28,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:57:28,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122217010] [2024-06-21 20:57:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:57:28,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:28,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:57:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:57:28,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:57:28,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 788 transitions, 12658 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:28,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:28,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:57:28,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:30,783 INFO L124 PetriNetUnfolderBase]: 3852/6045 cut-off events. [2024-06-21 20:57:30,783 INFO L125 PetriNetUnfolderBase]: For 1770419/1770437 co-relation queries the response was YES. [2024-06-21 20:57:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78857 conditions, 6045 events. 3852/6045 cut-off events. For 1770419/1770437 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 36414 event pairs, 560 based on Foata normal form. 14/6052 useless extension candidates. Maximal degree in co-relation 78631. Up to 5654 conditions per place. [2024-06-21 20:57:30,893 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 752 selfloop transitions, 47 changer transitions 0/804 dead transitions. [2024-06-21 20:57:30,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 804 transitions, 14494 flow [2024-06-21 20:57:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:57:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:57:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 20:57:30,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:57:30,894 INFO L175 Difference]: Start difference. First operand has 480 places, 788 transitions, 12658 flow. Second operand 10 states and 165 transitions. [2024-06-21 20:57:30,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 804 transitions, 14494 flow [2024-06-21 20:57:37,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 804 transitions, 14437 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 20:57:37,727 INFO L231 Difference]: Finished difference. Result has 480 places, 790 transitions, 12904 flow [2024-06-21 20:57:37,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12601, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12904, PETRI_PLACES=480, PETRI_TRANSITIONS=790} [2024-06-21 20:57:37,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-21 20:57:37,728 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 790 transitions, 12904 flow [2024-06-21 20:57:37,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:37,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:37,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:37,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:57:37,729 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:37,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash 78557923, now seen corresponding path program 3 times [2024-06-21 20:57:37,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:37,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977055321] [2024-06-21 20:57:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:37,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:39,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977055321] [2024-06-21 20:57:39,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977055321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:39,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:39,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:57:39,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544092317] [2024-06-21 20:57:39,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:39,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:57:39,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:57:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:57:39,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:57:39,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 790 transitions, 12904 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:39,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:39,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:57:39,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:41,658 INFO L124 PetriNetUnfolderBase]: 3845/6032 cut-off events. [2024-06-21 20:57:41,658 INFO L125 PetriNetUnfolderBase]: For 1771677/1771682 co-relation queries the response was YES. [2024-06-21 20:57:41,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78609 conditions, 6032 events. 3845/6032 cut-off events. For 1771677/1771682 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36354 event pairs, 598 based on Foata normal form. 5/6033 useless extension candidates. Maximal degree in co-relation 78382. Up to 5507 conditions per place. [2024-06-21 20:57:41,771 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 694 selfloop transitions, 103 changer transitions 0/802 dead transitions. [2024-06-21 20:57:41,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 802 transitions, 14826 flow [2024-06-21 20:57:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:57:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:57:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:57:41,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:57:41,772 INFO L175 Difference]: Start difference. First operand has 480 places, 790 transitions, 12904 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:57:41,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 802 transitions, 14826 flow [2024-06-21 20:57:48,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 802 transitions, 14539 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-06-21 20:57:48,779 INFO L231 Difference]: Finished difference. Result has 481 places, 790 transitions, 12846 flow [2024-06-21 20:57:48,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12617, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12846, PETRI_PLACES=481, PETRI_TRANSITIONS=790} [2024-06-21 20:57:48,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-21 20:57:48,780 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 790 transitions, 12846 flow [2024-06-21 20:57:48,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:48,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:48,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:48,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:57:48,781 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:48,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1299783111, now seen corresponding path program 4 times [2024-06-21 20:57:48,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:48,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891231228] [2024-06-21 20:57:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:48,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:50,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:50,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891231228] [2024-06-21 20:57:50,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891231228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:50,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:50,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:57:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179510419] [2024-06-21 20:57:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:50,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:57:50,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:50,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:57:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:57:50,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:57:50,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 790 transitions, 12846 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:50,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:50,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:57:50,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:52,559 INFO L124 PetriNetUnfolderBase]: 3836/6028 cut-off events. [2024-06-21 20:57:52,559 INFO L125 PetriNetUnfolderBase]: For 1748395/1748400 co-relation queries the response was YES. [2024-06-21 20:57:52,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77953 conditions, 6028 events. 3836/6028 cut-off events. For 1748395/1748400 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 36439 event pairs, 606 based on Foata normal form. 5/6019 useless extension candidates. Maximal degree in co-relation 77725. Up to 5158 conditions per place. [2024-06-21 20:57:52,685 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 639 selfloop transitions, 158 changer transitions 0/802 dead transitions. [2024-06-21 20:57:52,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 802 transitions, 14770 flow [2024-06-21 20:57:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:57:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:57:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:57:52,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 20:57:52,687 INFO L175 Difference]: Start difference. First operand has 481 places, 790 transitions, 12846 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:57:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 802 transitions, 14770 flow [2024-06-21 20:57:59,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 802 transitions, 14321 flow, removed 155 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:59,569 INFO L231 Difference]: Finished difference. Result has 484 places, 790 transitions, 12736 flow [2024-06-21 20:57:59,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12397, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12736, PETRI_PLACES=484, PETRI_TRANSITIONS=790} [2024-06-21 20:57:59,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-21 20:57:59,570 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 790 transitions, 12736 flow [2024-06-21 20:57:59,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:59,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:59,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:59,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:57:59,571 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:59,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:59,571 INFO L85 PathProgramCache]: Analyzing trace with hash 125101831, now seen corresponding path program 5 times [2024-06-21 20:57:59,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:59,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228399886] [2024-06-21 20:57:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:01,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228399886] [2024-06-21 20:58:01,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228399886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:01,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:01,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:58:01,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161453888] [2024-06-21 20:58:01,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:01,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:58:01,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:01,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:58:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:58:01,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:58:01,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 790 transitions, 12736 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:01,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:01,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:58:01,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:03,130 INFO L124 PetriNetUnfolderBase]: 3825/6009 cut-off events. [2024-06-21 20:58:03,130 INFO L125 PetriNetUnfolderBase]: For 1728677/1728682 co-relation queries the response was YES. [2024-06-21 20:58:03,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77337 conditions, 6009 events. 3825/6009 cut-off events. For 1728677/1728682 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 36288 event pairs, 604 based on Foata normal form. 5/6000 useless extension candidates. Maximal degree in co-relation 77108. Up to 5357 conditions per place. [2024-06-21 20:58:03,242 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 705 selfloop transitions, 93 changer transitions 0/803 dead transitions. [2024-06-21 20:58:03,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 803 transitions, 14370 flow [2024-06-21 20:58:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:58:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:58:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 20:58:03,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-21 20:58:03,243 INFO L175 Difference]: Start difference. First operand has 484 places, 790 transitions, 12736 flow. Second operand 10 states and 178 transitions. [2024-06-21 20:58:03,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 803 transitions, 14370 flow [2024-06-21 20:58:11,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 803 transitions, 13957 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:11,228 INFO L231 Difference]: Finished difference. Result has 487 places, 790 transitions, 12517 flow [2024-06-21 20:58:11,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12323, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12517, PETRI_PLACES=487, PETRI_TRANSITIONS=790} [2024-06-21 20:58:11,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-21 20:58:11,228 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 790 transitions, 12517 flow [2024-06-21 20:58:11,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:11,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:11,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:11,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:58:11,229 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:11,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:11,229 INFO L85 PathProgramCache]: Analyzing trace with hash -364658687, now seen corresponding path program 6 times [2024-06-21 20:58:11,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:11,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864131854] [2024-06-21 20:58:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:11,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:12,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864131854] [2024-06-21 20:58:12,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864131854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:12,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:58:12,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999614199] [2024-06-21 20:58:12,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:58:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:58:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:58:13,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:58:13,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 790 transitions, 12517 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:13,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:13,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:58:13,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:14,956 INFO L124 PetriNetUnfolderBase]: 3814/5992 cut-off events. [2024-06-21 20:58:14,959 INFO L125 PetriNetUnfolderBase]: For 1690307/1690312 co-relation queries the response was YES. [2024-06-21 20:58:15,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76309 conditions, 5992 events. 3814/5992 cut-off events. For 1690307/1690312 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 36149 event pairs, 602 based on Foata normal form. 5/5983 useless extension candidates. Maximal degree in co-relation 76079. Up to 4809 conditions per place. [2024-06-21 20:58:15,070 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 547 selfloop transitions, 254 changer transitions 0/806 dead transitions. [2024-06-21 20:58:15,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 806 transitions, 14200 flow [2024-06-21 20:58:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:58:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:58:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 20:58:15,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-21 20:58:15,084 INFO L175 Difference]: Start difference. First operand has 487 places, 790 transitions, 12517 flow. Second operand 10 states and 183 transitions. [2024-06-21 20:58:15,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 806 transitions, 14200 flow [2024-06-21 20:58:22,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 806 transitions, 13495 flow, removed 101 selfloop flow, removed 13 redundant places. [2024-06-21 20:58:22,534 INFO L231 Difference]: Finished difference. Result has 484 places, 790 transitions, 12331 flow [2024-06-21 20:58:22,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11815, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12331, PETRI_PLACES=484, PETRI_TRANSITIONS=790} [2024-06-21 20:58:22,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-21 20:58:22,535 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 790 transitions, 12331 flow [2024-06-21 20:58:22,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:22,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:22,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:22,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:58:22,536 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:22,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash 136214866, now seen corresponding path program 5 times [2024-06-21 20:58:22,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:22,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177040809] [2024-06-21 20:58:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:22,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:24,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177040809] [2024-06-21 20:58:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177040809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:24,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:24,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:58:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105542304] [2024-06-21 20:58:24,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:24,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:58:24,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:58:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:58:24,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:58:24,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 790 transitions, 12331 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:24,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:24,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:58:24,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:26,367 INFO L124 PetriNetUnfolderBase]: 3809/5982 cut-off events. [2024-06-21 20:58:26,367 INFO L125 PetriNetUnfolderBase]: For 1668330/1668345 co-relation queries the response was YES. [2024-06-21 20:58:26,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75910 conditions, 5982 events. 3809/5982 cut-off events. For 1668330/1668345 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36038 event pairs, 559 based on Foata normal form. 12/5988 useless extension candidates. Maximal degree in co-relation 75680. Up to 5619 conditions per place. [2024-06-21 20:58:26,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 771 selfloop transitions, 30 changer transitions 0/806 dead transitions. [2024-06-21 20:58:26,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 806 transitions, 14175 flow [2024-06-21 20:58:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:58:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:58:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 20:58:26,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-21 20:58:26,478 INFO L175 Difference]: Start difference. First operand has 484 places, 790 transitions, 12331 flow. Second operand 10 states and 162 transitions. [2024-06-21 20:58:26,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 806 transitions, 14175 flow [2024-06-21 20:58:33,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 806 transitions, 13182 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-21 20:58:33,439 INFO L231 Difference]: Finished difference. Result has 482 places, 792 transitions, 11611 flow [2024-06-21 20:58:33,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11338, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11611, PETRI_PLACES=482, PETRI_TRANSITIONS=792} [2024-06-21 20:58:33,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-21 20:58:33,441 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 792 transitions, 11611 flow [2024-06-21 20:58:33,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:33,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:33,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:33,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:58:33,442 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:33,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:33,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2044040855, now seen corresponding path program 11 times [2024-06-21 20:58:33,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:33,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732911569] [2024-06-21 20:58:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:34,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:34,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732911569] [2024-06-21 20:58:34,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732911569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:34,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:34,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:34,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488015140] [2024-06-21 20:58:34,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:34,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:34,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:34,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:34,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:34,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:58:34,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 792 transitions, 11611 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:34,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:34,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:58:34,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:36,567 INFO L124 PetriNetUnfolderBase]: 4026/6322 cut-off events. [2024-06-21 20:58:36,567 INFO L125 PetriNetUnfolderBase]: For 1789458/1789463 co-relation queries the response was YES. [2024-06-21 20:58:36,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78175 conditions, 6322 events. 4026/6322 cut-off events. For 1789458/1789463 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 38345 event pairs, 576 based on Foata normal form. 16/6334 useless extension candidates. Maximal degree in co-relation 77944. Up to 5611 conditions per place. [2024-06-21 20:58:36,683 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 772 selfloop transitions, 89 changer transitions 0/866 dead transitions. [2024-06-21 20:58:36,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 866 transitions, 14542 flow [2024-06-21 20:58:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:58:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:58:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 20:58:36,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-21 20:58:36,685 INFO L175 Difference]: Start difference. First operand has 482 places, 792 transitions, 11611 flow. Second operand 10 states and 186 transitions. [2024-06-21 20:58:36,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 866 transitions, 14542 flow [2024-06-21 20:58:42,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 866 transitions, 14265 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:42,953 INFO L231 Difference]: Finished difference. Result has 489 places, 833 transitions, 12612 flow [2024-06-21 20:58:42,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11346, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12612, PETRI_PLACES=489, PETRI_TRANSITIONS=833} [2024-06-21 20:58:42,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-21 20:58:42,954 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 833 transitions, 12612 flow [2024-06-21 20:58:42,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:42,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:42,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:42,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:58:42,955 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:42,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:42,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1854135569, now seen corresponding path program 1 times [2024-06-21 20:58:42,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:42,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711445547] [2024-06-21 20:58:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:42,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:44,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:44,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711445547] [2024-06-21 20:58:44,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711445547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:44,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:44,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:44,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744791534] [2024-06-21 20:58:44,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:44,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:44,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:58:44,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 833 transitions, 12612 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:44,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:44,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:58:44,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:46,202 INFO L124 PetriNetUnfolderBase]: 3857/6162 cut-off events. [2024-06-21 20:58:46,202 INFO L125 PetriNetUnfolderBase]: For 1776141/1776143 co-relation queries the response was YES. [2024-06-21 20:58:46,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77383 conditions, 6162 events. 3857/6162 cut-off events. For 1776141/1776143 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38355 event pairs, 612 based on Foata normal form. 10/6169 useless extension candidates. Maximal degree in co-relation 77147. Up to 5326 conditions per place. [2024-06-21 20:58:46,332 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 770 selfloop transitions, 17 changer transitions 0/860 dead transitions. [2024-06-21 20:58:46,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 860 transitions, 14338 flow [2024-06-21 20:58:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:58:46,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 20:58:46,349 INFO L175 Difference]: Start difference. First operand has 489 places, 833 transitions, 12612 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:58:46,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 860 transitions, 14338 flow [2024-06-21 20:58:54,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 860 transitions, 14056 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:54,010 INFO L231 Difference]: Finished difference. Result has 492 places, 834 transitions, 12412 flow [2024-06-21 20:58:54,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12330, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12412, PETRI_PLACES=492, PETRI_TRANSITIONS=834} [2024-06-21 20:58:54,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-21 20:58:54,011 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 834 transitions, 12412 flow [2024-06-21 20:58:54,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:54,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:54,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:54,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:58:54,012 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:54,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash -652012975, now seen corresponding path program 2 times [2024-06-21 20:58:54,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:54,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600517780] [2024-06-21 20:58:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:55,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:55,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600517780] [2024-06-21 20:58:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600517780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:55,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:55,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:55,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074778939] [2024-06-21 20:58:55,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:55,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:55,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:55,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:58:55,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 834 transitions, 12412 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:55,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:55,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:58:55,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:57,309 INFO L124 PetriNetUnfolderBase]: 3884/6212 cut-off events. [2024-06-21 20:58:57,309 INFO L125 PetriNetUnfolderBase]: For 1791576/1791578 co-relation queries the response was YES. [2024-06-21 20:58:57,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77401 conditions, 6212 events. 3884/6212 cut-off events. For 1791576/1791578 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 38783 event pairs, 640 based on Foata normal form. 10/6216 useless extension candidates. Maximal degree in co-relation 77165. Up to 5386 conditions per place. [2024-06-21 20:58:57,423 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 766 selfloop transitions, 18 changer transitions 0/857 dead transitions. [2024-06-21 20:58:57,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 857 transitions, 14122 flow [2024-06-21 20:58:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:58:57,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:58:57,425 INFO L175 Difference]: Start difference. First operand has 492 places, 834 transitions, 12412 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:58:57,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 857 transitions, 14122 flow [2024-06-21 20:59:06,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 857 transitions, 14064 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:06,032 INFO L231 Difference]: Finished difference. Result has 494 places, 835 transitions, 12440 flow [2024-06-21 20:59:06,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12354, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12440, PETRI_PLACES=494, PETRI_TRANSITIONS=835} [2024-06-21 20:59:06,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 20:59:06,033 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 835 transitions, 12440 flow [2024-06-21 20:59:06,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:06,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:06,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:06,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:59:06,034 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:06,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 519654757, now seen corresponding path program 3 times [2024-06-21 20:59:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:06,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014322530] [2024-06-21 20:59:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:06,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:07,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:07,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014322530] [2024-06-21 20:59:07,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014322530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:07,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:07,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84038716] [2024-06-21 20:59:07,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:07,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:07,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:59:07,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 835 transitions, 12440 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:07,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:07,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:59:07,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:09,744 INFO L124 PetriNetUnfolderBase]: 3899/6235 cut-off events. [2024-06-21 20:59:09,744 INFO L125 PetriNetUnfolderBase]: For 1749649/1749691 co-relation queries the response was YES. [2024-06-21 20:59:09,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77690 conditions, 6235 events. 3899/6235 cut-off events. For 1749649/1749691 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 38996 event pairs, 642 based on Foata normal form. 3/6235 useless extension candidates. Maximal degree in co-relation 77453. Up to 5434 conditions per place. [2024-06-21 20:59:09,865 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 763 selfloop transitions, 22 changer transitions 0/858 dead transitions. [2024-06-21 20:59:09,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 858 transitions, 14152 flow [2024-06-21 20:59:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 20:59:09,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 20:59:09,867 INFO L175 Difference]: Start difference. First operand has 494 places, 835 transitions, 12440 flow. Second operand 9 states and 160 transitions. [2024-06-21 20:59:09,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 858 transitions, 14152 flow [2024-06-21 20:59:17,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 858 transitions, 14090 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:17,952 INFO L231 Difference]: Finished difference. Result has 497 places, 840 transitions, 12534 flow [2024-06-21 20:59:17,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12378, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12534, PETRI_PLACES=497, PETRI_TRANSITIONS=840} [2024-06-21 20:59:17,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-21 20:59:17,953 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 840 transitions, 12534 flow [2024-06-21 20:59:17,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:17,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:17,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:17,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:59:17,953 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:17,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:17,954 INFO L85 PathProgramCache]: Analyzing trace with hash -114450309, now seen corresponding path program 4 times [2024-06-21 20:59:17,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:17,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756920980] [2024-06-21 20:59:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:19,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:19,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756920980] [2024-06-21 20:59:19,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756920980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:19,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:19,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655953624] [2024-06-21 20:59:19,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:19,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:19,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:19,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:19,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:59:19,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 840 transitions, 12534 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:19,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:19,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:59:19,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:21,674 INFO L124 PetriNetUnfolderBase]: 3913/6259 cut-off events. [2024-06-21 20:59:21,674 INFO L125 PetriNetUnfolderBase]: For 1765350/1765352 co-relation queries the response was YES. [2024-06-21 20:59:21,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78089 conditions, 6259 events. 3913/6259 cut-off events. For 1765350/1765352 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39205 event pairs, 648 based on Foata normal form. 4/6260 useless extension candidates. Maximal degree in co-relation 77850. Up to 5456 conditions per place. [2024-06-21 20:59:21,793 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 765 selfloop transitions, 22 changer transitions 0/860 dead transitions. [2024-06-21 20:59:21,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 860 transitions, 14275 flow [2024-06-21 20:59:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 20:59:21,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 20:59:21,794 INFO L175 Difference]: Start difference. First operand has 497 places, 840 transitions, 12534 flow. Second operand 9 states and 157 transitions. [2024-06-21 20:59:21,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 860 transitions, 14275 flow [2024-06-21 20:59:29,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 860 transitions, 14182 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:29,834 INFO L231 Difference]: Finished difference. Result has 502 places, 845 transitions, 12634 flow [2024-06-21 20:59:29,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12441, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12634, PETRI_PLACES=502, PETRI_TRANSITIONS=845} [2024-06-21 20:59:29,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-21 20:59:29,848 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 845 transitions, 12634 flow [2024-06-21 20:59:29,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:29,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:29,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:59:29,849 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:29,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:29,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1372954001, now seen corresponding path program 5 times [2024-06-21 20:59:29,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:29,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638609149] [2024-06-21 20:59:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:31,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638609149] [2024-06-21 20:59:31,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638609149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:31,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:31,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780296045] [2024-06-21 20:59:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:31,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:31,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:59:31,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 845 transitions, 12634 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:31,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:31,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:59:31,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:33,465 INFO L124 PetriNetUnfolderBase]: 3927/6285 cut-off events. [2024-06-21 20:59:33,465 INFO L125 PetriNetUnfolderBase]: For 1784622/1784624 co-relation queries the response was YES. [2024-06-21 20:59:33,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78500 conditions, 6285 events. 3927/6285 cut-off events. For 1784622/1784624 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39413 event pairs, 646 based on Foata normal form. 4/6286 useless extension candidates. Maximal degree in co-relation 78258. Up to 5477 conditions per place. [2024-06-21 20:59:33,585 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 771 selfloop transitions, 19 changer transitions 0/863 dead transitions. [2024-06-21 20:59:33,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 863 transitions, 14326 flow [2024-06-21 20:59:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 20:59:33,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 20:59:33,586 INFO L175 Difference]: Start difference. First operand has 502 places, 845 transitions, 12634 flow. Second operand 9 states and 157 transitions. [2024-06-21 20:59:33,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 863 transitions, 14326 flow [2024-06-21 20:59:42,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 863 transitions, 14216 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:42,400 INFO L231 Difference]: Finished difference. Result has 504 places, 847 transitions, 12641 flow [2024-06-21 20:59:42,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12524, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12641, PETRI_PLACES=504, PETRI_TRANSITIONS=847} [2024-06-21 20:59:42,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-21 20:59:42,401 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 847 transitions, 12641 flow [2024-06-21 20:59:42,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:42,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:42,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:42,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:59:42,402 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:42,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -109087929, now seen corresponding path program 6 times [2024-06-21 20:59:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:42,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298950775] [2024-06-21 20:59:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:42,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:43,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:43,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298950775] [2024-06-21 20:59:43,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298950775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:43,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:43,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:43,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89970633] [2024-06-21 20:59:43,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:43,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:43,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:43,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:43,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:59:43,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 847 transitions, 12641 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:43,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:43,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:59:43,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:46,009 INFO L124 PetriNetUnfolderBase]: 3969/6351 cut-off events. [2024-06-21 20:59:46,010 INFO L125 PetriNetUnfolderBase]: For 1910922/1910924 co-relation queries the response was YES. [2024-06-21 20:59:46,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79556 conditions, 6351 events. 3969/6351 cut-off events. For 1910922/1910924 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39931 event pairs, 652 based on Foata normal form. 12/6360 useless extension candidates. Maximal degree in co-relation 79313. Up to 5487 conditions per place. [2024-06-21 20:59:46,133 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 756 selfloop transitions, 39 changer transitions 0/868 dead transitions. [2024-06-21 20:59:46,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 868 transitions, 14783 flow [2024-06-21 20:59:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:59:46,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 20:59:46,134 INFO L175 Difference]: Start difference. First operand has 504 places, 847 transitions, 12641 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:59:46,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 868 transitions, 14783 flow [2024-06-21 20:59:54,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 868 transitions, 14682 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:54,658 INFO L231 Difference]: Finished difference. Result has 506 places, 849 transitions, 12704 flow [2024-06-21 20:59:54,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12540, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12704, PETRI_PLACES=506, PETRI_TRANSITIONS=849} [2024-06-21 20:59:54,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-21 20:59:54,659 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 849 transitions, 12704 flow [2024-06-21 20:59:54,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:54,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:54,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:54,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:59:54,660 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:54,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1367437799, now seen corresponding path program 1 times [2024-06-21 20:59:54,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:54,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182333709] [2024-06-21 20:59:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:56,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:56,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182333709] [2024-06-21 20:59:56,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182333709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:56,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:56,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627295786] [2024-06-21 20:59:56,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:56,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:56,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:56,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:56,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:56,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:59:56,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 849 transitions, 12704 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:56,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:56,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:59:56,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:59,258 INFO L124 PetriNetUnfolderBase]: 4200/6588 cut-off events. [2024-06-21 20:59:59,258 INFO L125 PetriNetUnfolderBase]: For 1801641/1801643 co-relation queries the response was YES. [2024-06-21 20:59:59,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82095 conditions, 6588 events. 4200/6588 cut-off events. For 1801641/1801643 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40238 event pairs, 676 based on Foata normal form. 1/6586 useless extension candidates. Maximal degree in co-relation 81851. Up to 6197 conditions per place. [2024-06-21 20:59:59,384 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 822 selfloop transitions, 44 changer transitions 0/871 dead transitions. [2024-06-21 20:59:59,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 871 transitions, 14905 flow [2024-06-21 20:59:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 20:59:59,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:59:59,385 INFO L175 Difference]: Start difference. First operand has 506 places, 849 transitions, 12704 flow. Second operand 10 states and 170 transitions. [2024-06-21 20:59:59,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 871 transitions, 14905 flow [2024-06-21 21:00:07,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 871 transitions, 14774 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:07,660 INFO L231 Difference]: Finished difference. Result has 509 places, 855 transitions, 12772 flow [2024-06-21 21:00:07,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12584, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12772, PETRI_PLACES=509, PETRI_TRANSITIONS=855} [2024-06-21 21:00:07,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-21 21:00:07,665 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 855 transitions, 12772 flow [2024-06-21 21:00:07,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:07,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:07,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:07,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 21:00:07,666 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:07,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:07,666 INFO L85 PathProgramCache]: Analyzing trace with hash -108872448, now seen corresponding path program 1 times [2024-06-21 21:00:07,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:07,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594522205] [2024-06-21 21:00:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:07,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:09,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594522205] [2024-06-21 21:00:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594522205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:09,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:09,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:00:09,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868229504] [2024-06-21 21:00:09,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:09,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:00:09,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:00:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:00:09,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 21:00:09,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 855 transitions, 12772 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:09,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:09,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 21:00:09,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:11,947 INFO L124 PetriNetUnfolderBase]: 4244/6654 cut-off events. [2024-06-21 21:00:11,947 INFO L125 PetriNetUnfolderBase]: For 1934833/1934835 co-relation queries the response was YES. [2024-06-21 21:00:12,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82822 conditions, 6654 events. 4244/6654 cut-off events. For 1934833/1934835 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40715 event pairs, 682 based on Foata normal form. 10/6661 useless extension candidates. Maximal degree in co-relation 82577. Up to 6236 conditions per place. [2024-06-21 21:00:12,079 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 842 selfloop transitions, 30 changer transitions 0/877 dead transitions. [2024-06-21 21:00:12,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 877 transitions, 14802 flow [2024-06-21 21:00:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:00:12,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 21:00:12,081 INFO L175 Difference]: Start difference. First operand has 509 places, 855 transitions, 12772 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:00:12,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 877 transitions, 14802 flow [2024-06-21 21:00:20,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 877 transitions, 14654 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:20,686 INFO L231 Difference]: Finished difference. Result has 511 places, 858 transitions, 12824 flow [2024-06-21 21:00:20,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12624, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12824, PETRI_PLACES=511, PETRI_TRANSITIONS=858} [2024-06-21 21:00:20,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-21 21:00:20,687 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 858 transitions, 12824 flow [2024-06-21 21:00:20,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:20,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:20,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:20,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 21:00:20,688 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:20,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1367235989, now seen corresponding path program 2 times [2024-06-21 21:00:20,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:20,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508545492] [2024-06-21 21:00:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:20,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:22,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:22,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508545492] [2024-06-21 21:00:22,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508545492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:22,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:22,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:00:22,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626351899] [2024-06-21 21:00:22,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:00:22,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:22,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:00:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:00:22,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 21:00:22,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 858 transitions, 12824 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:22,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:22,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 21:00:22,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:25,047 INFO L124 PetriNetUnfolderBase]: 4241/6652 cut-off events. [2024-06-21 21:00:25,048 INFO L125 PetriNetUnfolderBase]: For 1834326/1834328 co-relation queries the response was YES. [2024-06-21 21:00:25,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82847 conditions, 6652 events. 4241/6652 cut-off events. For 1834326/1834328 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 40747 event pairs, 684 based on Foata normal form. 1/6650 useless extension candidates. Maximal degree in co-relation 82601. Up to 6274 conditions per place. [2024-06-21 21:00:25,174 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 832 selfloop transitions, 36 changer transitions 0/873 dead transitions. [2024-06-21 21:00:25,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 873 transitions, 14600 flow [2024-06-21 21:00:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:00:25,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:00:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 21:00:25,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 21:00:25,175 INFO L175 Difference]: Start difference. First operand has 511 places, 858 transitions, 12824 flow. Second operand 10 states and 166 transitions. [2024-06-21 21:00:25,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 873 transitions, 14600 flow [2024-06-21 21:00:33,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 873 transitions, 14421 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:33,894 INFO L231 Difference]: Finished difference. Result has 514 places, 858 transitions, 12723 flow [2024-06-21 21:00:33,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12645, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12723, PETRI_PLACES=514, PETRI_TRANSITIONS=858} [2024-06-21 21:00:33,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-21 21:00:33,894 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 858 transitions, 12723 flow [2024-06-21 21:00:33,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:33,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:33,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:33,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 21:00:33,895 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:33,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:33,895 INFO L85 PathProgramCache]: Analyzing trace with hash 269884425, now seen corresponding path program 7 times [2024-06-21 21:00:33,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:33,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263062422] [2024-06-21 21:00:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:33,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:35,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:35,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263062422] [2024-06-21 21:00:35,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263062422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:35,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:35,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:35,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465919171] [2024-06-21 21:00:35,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:35,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:35,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:35,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:35,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 21:00:35,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 858 transitions, 12723 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:35,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:35,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 21:00:35,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:37,831 INFO L124 PetriNetUnfolderBase]: 4050/6484 cut-off events. [2024-06-21 21:00:37,831 INFO L125 PetriNetUnfolderBase]: For 1983685/1983690 co-relation queries the response was YES. [2024-06-21 21:00:37,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81312 conditions, 6484 events. 4050/6484 cut-off events. For 1983685/1983690 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40971 event pairs, 670 based on Foata normal form. 14/6492 useless extension candidates. Maximal degree in co-relation 81065. Up to 5618 conditions per place. [2024-06-21 21:00:37,972 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 777 selfloop transitions, 30 changer transitions 0/880 dead transitions. [2024-06-21 21:00:37,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 880 transitions, 14651 flow [2024-06-21 21:00:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:00:37,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 21:00:37,977 INFO L175 Difference]: Start difference. First operand has 514 places, 858 transitions, 12723 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:00:37,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 880 transitions, 14651 flow [2024-06-21 21:00:46,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 880 transitions, 14506 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 21:00:46,810 INFO L231 Difference]: Finished difference. Result has 515 places, 863 transitions, 12793 flow [2024-06-21 21:00:46,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12578, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12793, PETRI_PLACES=515, PETRI_TRANSITIONS=863} [2024-06-21 21:00:46,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-21 21:00:46,811 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 863 transitions, 12793 flow [2024-06-21 21:00:46,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:46,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:46,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:46,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 21:00:46,811 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:46,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:46,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1332318831, now seen corresponding path program 8 times [2024-06-21 21:00:46,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:46,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5670701] [2024-06-21 21:00:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:46,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:48,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:48,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5670701] [2024-06-21 21:00:48,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5670701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:48,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:48,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:48,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906802890] [2024-06-21 21:00:48,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:48,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:48,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:48,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 21:00:48,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 863 transitions, 12793 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:48,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:48,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 21:00:48,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:50,735 INFO L124 PetriNetUnfolderBase]: 4064/6508 cut-off events. [2024-06-21 21:00:50,736 INFO L125 PetriNetUnfolderBase]: For 1909270/1909275 co-relation queries the response was YES. [2024-06-21 21:00:50,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81800 conditions, 6508 events. 4064/6508 cut-off events. For 1909270/1909275 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 41233 event pairs, 666 based on Foata normal form. 6/6508 useless extension candidates. Maximal degree in co-relation 81552. Up to 5678 conditions per place. [2024-06-21 21:00:50,869 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 779 selfloop transitions, 26 changer transitions 0/878 dead transitions. [2024-06-21 21:00:50,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 878 transitions, 14517 flow [2024-06-21 21:00:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:00:50,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 21:00:50,871 INFO L175 Difference]: Start difference. First operand has 515 places, 863 transitions, 12793 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:00:50,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 878 transitions, 14517 flow [2024-06-21 21:00:59,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 878 transitions, 14444 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:00:59,611 INFO L231 Difference]: Finished difference. Result has 518 places, 865 transitions, 12863 flow [2024-06-21 21:00:59,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12720, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12863, PETRI_PLACES=518, PETRI_TRANSITIONS=865} [2024-06-21 21:00:59,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-21 21:00:59,612 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 865 transitions, 12863 flow [2024-06-21 21:00:59,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:59,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:59,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:59,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 21:00:59,613 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:59,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1337829081, now seen corresponding path program 9 times [2024-06-21 21:00:59,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:59,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028443157] [2024-06-21 21:00:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:00,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028443157] [2024-06-21 21:01:00,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028443157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:00,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:00,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:00,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342769604] [2024-06-21 21:01:00,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:00,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:00,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:00,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:00,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:00,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 21:01:00,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 865 transitions, 12863 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:00,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:00,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 21:01:00,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:03,504 INFO L124 PetriNetUnfolderBase]: 4106/6572 cut-off events. [2024-06-21 21:01:03,505 INFO L125 PetriNetUnfolderBase]: For 2043197/2043202 co-relation queries the response was YES. [2024-06-21 21:01:03,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82861 conditions, 6572 events. 4106/6572 cut-off events. For 2043197/2043202 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41651 event pairs, 670 based on Foata normal form. 14/6580 useless extension candidates. Maximal degree in co-relation 82612. Up to 5688 conditions per place. [2024-06-21 21:01:03,636 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 762 selfloop transitions, 48 changer transitions 0/883 dead transitions. [2024-06-21 21:01:03,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 883 transitions, 15049 flow [2024-06-21 21:01:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:01:03,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 21:01:03,638 INFO L175 Difference]: Start difference. First operand has 518 places, 865 transitions, 12863 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:01:03,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 883 transitions, 15049 flow [2024-06-21 21:01:10,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 883 transitions, 14922 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:10,878 INFO L231 Difference]: Finished difference. Result has 520 places, 867 transitions, 12930 flow [2024-06-21 21:01:10,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12736, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12930, PETRI_PLACES=520, PETRI_TRANSITIONS=867} [2024-06-21 21:01:10,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-21 21:01:10,879 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 867 transitions, 12930 flow [2024-06-21 21:01:10,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:10,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:10,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:10,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 21:01:10,879 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:10,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1249752137, now seen corresponding path program 10 times [2024-06-21 21:01:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:10,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36044620] [2024-06-21 21:01:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:10,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36044620] [2024-06-21 21:01:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36044620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:12,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:12,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365956712] [2024-06-21 21:01:12,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:12,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:12,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:12,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:12,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:12,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 21:01:12,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 867 transitions, 12930 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:12,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:12,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 21:01:12,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:14,717 INFO L124 PetriNetUnfolderBase]: 4129/6613 cut-off events. [2024-06-21 21:01:14,717 INFO L125 PetriNetUnfolderBase]: For 2045524/2045529 co-relation queries the response was YES. [2024-06-21 21:01:14,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83109 conditions, 6613 events. 4129/6613 cut-off events. For 2045524/2045529 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 42003 event pairs, 674 based on Foata normal form. 15/6622 useless extension candidates. Maximal degree in co-relation 82859. Up to 5663 conditions per place. [2024-06-21 21:01:14,845 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 722 selfloop transitions, 97 changer transitions 0/892 dead transitions. [2024-06-21 21:01:14,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 892 transitions, 15828 flow [2024-06-21 21:01:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:01:14,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 21:01:14,847 INFO L175 Difference]: Start difference. First operand has 520 places, 867 transitions, 12930 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:01:14,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 892 transitions, 15828 flow