./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe035_power.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/safe035_power.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/safe035_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe035_power.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 20:17:26,734 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:17:26,805 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:17:26,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:17:26,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:17:26,836 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:17:26,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:17:26,837 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:17:26,837 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:17:26,838 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:17:26,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:17:26,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:17:26,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:17:26,841 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:17:26,841 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:17:26,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:17:26,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:17:26,844 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:17:26,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:17:26,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:17:26,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:17:26,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:17:26,846 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:17:26,846 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:17:26,846 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:17:26,846 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:17:26,846 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:17:26,847 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:17:26,847 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:17:26,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:17:26,848 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:17:26,848 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:17:26,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:17:26,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:17:26,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:17:26,849 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:17:26,849 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:17:26,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:17:26,850 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:17:26,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:17:26,850 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:17:26,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:17:26,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:17:26,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:17:27,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:17:27,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:17:27,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:17:27,097 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:17:27,098 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:17:27,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe035_power.yml/witness.yml [2024-06-21 20:17:27,284 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:17:27,285 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:17:27,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i [2024-06-21 20:17:28,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:17:28,515 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:17:28,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i [2024-06-21 20:17:28,530 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1624df569/c4a2e60d1ab94bb4949839a5ed56148b/FLAG35daf91af [2024-06-21 20:17:28,540 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1624df569/c4a2e60d1ab94bb4949839a5ed56148b [2024-06-21 20:17:28,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:17:28,541 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:17:28,542 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:17:28,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:17:28,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:17:28,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:17:27" (1/2) ... [2024-06-21 20:17:28,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162048d3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:28, skipping insertion in model container [2024-06-21 20:17:28,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:17:27" (1/2) ... [2024-06-21 20:17:28,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d42b69b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:28, skipping insertion in model container [2024-06-21 20:17:28,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:17:28" (2/2) ... [2024-06-21 20:17:28,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162048d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:28, skipping insertion in model container [2024-06-21 20:17:28,549 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:17:28" (2/2) ... [2024-06-21 20:17:28,549 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:17:28,634 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:17:28,636 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] (((((((((((((((((! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! 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$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$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) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 20:17:28,636 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$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_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_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$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 20:17:28,636 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! 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$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$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) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 20:17:28,636 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:17:28,636 INFO L106 edCorrectnessWitness]: ghost_update [L869-L869] multithreaded = 1; [2024-06-21 20:17:28,675 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:17:29,039 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:17:29,047 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:17:29,206 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:17:29,241 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:17:29,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29 WrapperNode [2024-06-21 20:17:29,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:17:29,243 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:17:29,243 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:17:29,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:17:29,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,308 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 175 [2024-06-21 20:17:29,308 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:17:29,309 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:17:29,309 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:17:29,309 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:17:29,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,333 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,355 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 20:17:29,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,369 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,387 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,388 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:17:29,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:17:29,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:17:29,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:17:29,397 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (1/1) ... [2024-06-21 20:17:29,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:17:29,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:17:29,421 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 20:17:29,457 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 20:17:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:17:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:17:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:17:29,470 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:17:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:17:29,470 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:17:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:17:29,471 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:17:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:17:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:17:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:17:29,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:17:29,472 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 20:17:29,600 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:17:29,602 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:17:29,965 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:17:29,966 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:17:30,141 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:17:30,141 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:17:30,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:17:30 BoogieIcfgContainer [2024-06-21 20:17:30,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:17:30,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:17:30,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:17:30,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:17:30,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:17:27" (1/4) ... [2024-06-21 20:17:30,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3277c1d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:17:30, skipping insertion in model container [2024-06-21 20:17:30,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:17:28" (2/4) ... [2024-06-21 20:17:30,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3277c1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:17:30, skipping insertion in model container [2024-06-21 20:17:30,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:29" (3/4) ... [2024-06-21 20:17:30,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3277c1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:17:30, skipping insertion in model container [2024-06-21 20:17:30,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:17:30" (4/4) ... [2024-06-21 20:17:30,149 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_power.i [2024-06-21 20:17:30,162 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:17:30,162 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:17:30,163 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:17:30,204 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:17:30,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:17:30,264 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 20:17:30,264 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:17:30,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:17:30,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:17:30,269 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 20:17:30,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:17:30,306 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;@3c5f6934, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:17:30,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:17:30,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:17:30,309 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:17:30,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:17:30,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:30,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:17:30,309 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 20:17:30,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash 480640100, now seen corresponding path program 1 times [2024-06-21 20:17:30,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:30,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171274085] [2024-06-21 20:17:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:30,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:31,053 INFO 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 20:17:31,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:31,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171274085] [2024-06-21 20:17:31,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171274085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:31,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:31,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:17:31,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944976323] [2024-06-21 20:17:31,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:31,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:17:31,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:17:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:17:31,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:17:31,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:31,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:31,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:17:31,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:31,594 INFO L124 PetriNetUnfolderBase]: 2252/3336 cut-off events. [2024-06-21 20:17:31,594 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-21 20:17:31,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6763 conditions, 3336 events. 2252/3336 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15955 event pairs, 1635 based on Foata normal form. 1/3288 useless extension candidates. Maximal degree in co-relation 6751. Up to 3316 conditions per place. [2024-06-21 20:17:31,613 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 20:17:31,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 181 flow [2024-06-21 20:17:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:17:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:17:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 20:17:31,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-21 20:17:31,623 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-21 20:17:31,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 181 flow [2024-06-21 20:17:31,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:31,627 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 20:17:31,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 20:17:31,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 20:17:31,630 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 20:17:31,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:31,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:31,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:17:31,631 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 20:17:31,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1961314621, now seen corresponding path program 1 times [2024-06-21 20:17:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047543265] [2024-06-21 20:17:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:32,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:32,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047543265] [2024-06-21 20:17:32,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047543265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:32,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:32,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:17:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748875242] [2024-06-21 20:17:32,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:32,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:17:32,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:17:32,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:17:32,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:17:32,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:32,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:32,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:17:32,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:32,489 INFO L124 PetriNetUnfolderBase]: 2234/3309 cut-off events. [2024-06-21 20:17:32,489 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2024-06-21 20:17:32,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 3309 events. 2234/3309 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15896 event pairs, 1159 based on Foata normal form. 9/3316 useless extension candidates. Maximal degree in co-relation 7482. Up to 3244 conditions per place. [2024-06-21 20:17:32,502 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-21 20:17:32,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 256 flow [2024-06-21 20:17:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:17:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:17:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 20:17:32,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-21 20:17:32,505 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 94 transitions. [2024-06-21 20:17:32,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 256 flow [2024-06-21 20:17:32,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:32,506 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 20:17:32,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 20:17:32,507 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 20:17:32,507 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 20:17:32,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:32,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:32,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:32,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:17:32,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:32,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash -795775373, now seen corresponding path program 1 times [2024-06-21 20:17:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:32,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882551460] [2024-06-21 20:17:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:33,011 INFO 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 20:17:33,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882551460] [2024-06-21 20:17:33,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882551460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:33,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:33,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:33,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139524228] [2024-06-21 20:17:33,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:33,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:33,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:33,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:33,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:33,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:33,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:33,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:33,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:33,615 INFO L124 PetriNetUnfolderBase]: 2614/3849 cut-off events. [2024-06-21 20:17:33,615 INFO L125 PetriNetUnfolderBase]: For 1997/1997 co-relation queries the response was YES. [2024-06-21 20:17:33,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 3849 events. 2614/3849 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18061 event pairs, 1732 based on Foata normal form. 8/3855 useless extension candidates. Maximal degree in co-relation 9547. Up to 3801 conditions per place. [2024-06-21 20:17:33,630 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-21 20:17:33,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 294 flow [2024-06-21 20:17:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 20:17:33,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-21 20:17:33,632 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 88 transitions. [2024-06-21 20:17:33,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 294 flow [2024-06-21 20:17:33,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 280 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:33,635 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 168 flow [2024-06-21 20:17:33,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 20:17:33,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-21 20:17:33,636 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 168 flow [2024-06-21 20:17:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:33,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:33,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:33,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:17:33,636 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 20:17:33,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1336143745, now seen corresponding path program 1 times [2024-06-21 20:17:33,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:33,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064493710] [2024-06-21 20:17:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:33,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:35,004 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 20:17:35,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:35,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064493710] [2024-06-21 20:17:35,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064493710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:35,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:35,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687277374] [2024-06-21 20:17:35,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:35,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:35,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:35,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 20:17:35,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:35,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:35,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 20:17:35,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:35,605 INFO L124 PetriNetUnfolderBase]: 2605/3834 cut-off events. [2024-06-21 20:17:35,605 INFO L125 PetriNetUnfolderBase]: For 3451/3451 co-relation queries the response was YES. [2024-06-21 20:17:35,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10315 conditions, 3834 events. 2605/3834 cut-off events. For 3451/3451 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17914 event pairs, 969 based on Foata normal form. 6/3838 useless extension candidates. Maximal degree in co-relation 10299. Up to 3732 conditions per place. [2024-06-21 20:17:35,622 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-21 20:17:35,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 398 flow [2024-06-21 20:17:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 20:17:35,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-21 20:17:35,624 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 168 flow. Second operand 6 states and 125 transitions. [2024-06-21 20:17:35,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 398 flow [2024-06-21 20:17:35,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 380 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:35,626 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 209 flow [2024-06-21 20:17:35,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-21 20:17:35,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 20:17:35,627 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 209 flow [2024-06-21 20:17:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:35,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:35,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:35,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:17:35,628 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 20:17:35,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash -242573038, now seen corresponding path program 1 times [2024-06-21 20:17:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:35,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79127674] [2024-06-21 20:17:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:36,154 INFO 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 20:17:36,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:36,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79127674] [2024-06-21 20:17:36,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79127674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:36,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:36,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:36,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575309578] [2024-06-21 20:17:36,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:36,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:36,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:36,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:36,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:36,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:36,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:36,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:36,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:36,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:36,827 INFO L124 PetriNetUnfolderBase]: 2649/3899 cut-off events. [2024-06-21 20:17:36,828 INFO L125 PetriNetUnfolderBase]: For 5768/5768 co-relation queries the response was YES. [2024-06-21 20:17:36,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11304 conditions, 3899 events. 2649/3899 cut-off events. For 5768/5768 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18268 event pairs, 1185 based on Foata normal form. 8/3904 useless extension candidates. Maximal degree in co-relation 11286. Up to 3730 conditions per place. [2024-06-21 20:17:36,843 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 62 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-21 20:17:36,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 483 flow [2024-06-21 20:17:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 20:17:36,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 20:17:36,845 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 209 flow. Second operand 6 states and 110 transitions. [2024-06-21 20:17:36,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 483 flow [2024-06-21 20:17:36,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 454 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:36,849 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 278 flow [2024-06-21 20:17:36,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-21 20:17:36,850 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-21 20:17:36,850 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 278 flow [2024-06-21 20:17:36,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:36,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:36,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:36,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:17:36,851 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 20:17:36,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1919172220, now seen corresponding path program 2 times [2024-06-21 20:17:36,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:36,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930027320] [2024-06-21 20:17:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:36,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:37,403 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 20:17:37,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930027320] [2024-06-21 20:17:37,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930027320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:37,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:37,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:37,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811298180] [2024-06-21 20:17:37,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:37,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:37,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:37,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:37,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:37,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:37,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:38,128 INFO L124 PetriNetUnfolderBase]: 2629/3873 cut-off events. [2024-06-21 20:17:38,129 INFO L125 PetriNetUnfolderBase]: For 8213/8215 co-relation queries the response was YES. [2024-06-21 20:17:38,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12062 conditions, 3873 events. 2629/3873 cut-off events. For 8213/8215 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18173 event pairs, 1187 based on Foata normal form. 10/3879 useless extension candidates. Maximal degree in co-relation 12041. Up to 3718 conditions per place. [2024-06-21 20:17:38,145 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 57 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 20:17:38,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 472 flow [2024-06-21 20:17:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 20:17:38,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 20:17:38,147 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 278 flow. Second operand 6 states and 105 transitions. [2024-06-21 20:17:38,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 472 flow [2024-06-21 20:17:38,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 452 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:38,153 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 298 flow [2024-06-21 20:17:38,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-21 20:17:38,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-21 20:17:38,154 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 298 flow [2024-06-21 20:17:38,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:38,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:38,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:38,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:17:38,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:38,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash 144986928, now seen corresponding path program 1 times [2024-06-21 20:17:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:38,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427133285] [2024-06-21 20:17:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:38,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:38,708 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 20:17:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427133285] [2024-06-21 20:17:38,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427133285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:38,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:38,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796174864] [2024-06-21 20:17:38,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:38,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:17:38,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 298 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:38,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:38,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:17:38,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:39,197 INFO L124 PetriNetUnfolderBase]: 2478/3718 cut-off events. [2024-06-21 20:17:39,198 INFO L125 PetriNetUnfolderBase]: For 9333/9333 co-relation queries the response was YES. [2024-06-21 20:17:39,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 3718 events. 2478/3718 cut-off events. For 9333/9333 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17977 event pairs, 1400 based on Foata normal form. 1/3717 useless extension candidates. Maximal degree in co-relation 11786. Up to 3662 conditions per place. [2024-06-21 20:17:39,214 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 52 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-21 20:17:39,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 67 transitions, 454 flow [2024-06-21 20:17:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 20:17:39,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-21 20:17:39,215 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 298 flow. Second operand 5 states and 84 transitions. [2024-06-21 20:17:39,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 67 transitions, 454 flow [2024-06-21 20:17:39,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 67 transitions, 418 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:39,220 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 306 flow [2024-06-21 20:17:39,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-21 20:17:39,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-21 20:17:39,221 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 306 flow [2024-06-21 20:17:39,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:39,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:39,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:39,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:17:39,222 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 20:17:39,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:39,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1923011705, now seen corresponding path program 1 times [2024-06-21 20:17:39,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:39,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947586217] [2024-06-21 20:17:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:39,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:40,058 INFO 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 20:17:40,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:40,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947586217] [2024-06-21 20:17:40,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947586217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:40,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:40,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:17:40,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692288361] [2024-06-21 20:17:40,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:40,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:17:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:17:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:17:40,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:40,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 306 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 20:17:40,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:40,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:40,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:40,897 INFO L124 PetriNetUnfolderBase]: 2670/3930 cut-off events. [2024-06-21 20:17:40,897 INFO L125 PetriNetUnfolderBase]: For 12240/12240 co-relation queries the response was YES. [2024-06-21 20:17:40,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13134 conditions, 3930 events. 2670/3930 cut-off events. For 12240/12240 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18437 event pairs, 1046 based on Foata normal form. 8/3936 useless extension candidates. Maximal degree in co-relation 13110. Up to 3812 conditions per place. [2024-06-21 20:17:40,914 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-21 20:17:40,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 574 flow [2024-06-21 20:17:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 20:17:40,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 20:17:40,916 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 306 flow. Second operand 7 states and 122 transitions. [2024-06-21 20:17:40,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 574 flow [2024-06-21 20:17:40,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 552 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:40,922 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 346 flow [2024-06-21 20:17:40,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-21 20:17:40,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-21 20:17:40,923 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 346 flow [2024-06-21 20:17:40,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 20:17:40,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:40,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:40,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:17:40,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:40,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1923007055, now seen corresponding path program 2 times [2024-06-21 20:17:40,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:40,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205287133] [2024-06-21 20:17:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:40,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:41,739 INFO 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 20:17:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:41,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205287133] [2024-06-21 20:17:41,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205287133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:41,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:41,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:17:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744360049] [2024-06-21 20:17:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:17:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:17:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:17:41,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:41,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 346 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 20:17:41,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:41,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:41,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:42,530 INFO L124 PetriNetUnfolderBase]: 2714/3995 cut-off events. [2024-06-21 20:17:42,530 INFO L125 PetriNetUnfolderBase]: For 15755/15755 co-relation queries the response was YES. [2024-06-21 20:17:42,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14231 conditions, 3995 events. 2714/3995 cut-off events. For 15755/15755 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18809 event pairs, 932 based on Foata normal form. 8/4000 useless extension candidates. Maximal degree in co-relation 14206. Up to 3658 conditions per place. [2024-06-21 20:17:42,547 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-21 20:17:42,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 702 flow [2024-06-21 20:17:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:17:42,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 20:17:42,548 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 346 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:17:42,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 702 flow [2024-06-21 20:17:42,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 664 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:42,556 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 426 flow [2024-06-21 20:17:42,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-21 20:17:42,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-21 20:17:42,557 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 426 flow [2024-06-21 20:17:42,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 20:17:42,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:42,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:17:42,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:42,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash 698989555, now seen corresponding path program 1 times [2024-06-21 20:17:42,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:42,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777652625] [2024-06-21 20:17:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:42,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:43,518 INFO 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 20:17:43,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:43,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777652625] [2024-06-21 20:17:43,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777652625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:43,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:43,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309725797] [2024-06-21 20:17:43,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:43,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:43,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:43,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:43,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:43,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:43,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:43,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:43,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:44,316 INFO L124 PetriNetUnfolderBase]: 2758/4059 cut-off events. [2024-06-21 20:17:44,316 INFO L125 PetriNetUnfolderBase]: For 20560/20560 co-relation queries the response was YES. [2024-06-21 20:17:44,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15287 conditions, 4059 events. 2758/4059 cut-off events. For 20560/20560 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19188 event pairs, 1056 based on Foata normal form. 8/4064 useless extension candidates. Maximal degree in co-relation 15261. Up to 3770 conditions per place. [2024-06-21 20:17:44,334 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 81 selfloop transitions, 23 changer transitions 0/107 dead transitions. [2024-06-21 20:17:44,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 794 flow [2024-06-21 20:17:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:17:44,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 20:17:44,336 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 426 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:17:44,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 794 flow [2024-06-21 20:17:44,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 758 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:44,346 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 498 flow [2024-06-21 20:17:44,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-21 20:17:44,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-21 20:17:44,347 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 498 flow [2024-06-21 20:17:44,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:44,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:44,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:44,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:17:44,348 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 20:17:44,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:44,348 INFO L85 PathProgramCache]: Analyzing trace with hash 881096019, now seen corresponding path program 3 times [2024-06-21 20:17:44,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:44,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312876472] [2024-06-21 20:17:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:44,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:45,199 INFO 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 20:17:45,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:45,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312876472] [2024-06-21 20:17:45,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312876472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:45,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:45,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:17:45,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840997784] [2024-06-21 20:17:45,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:45,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:17:45,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:17:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:17:45,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:45,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 498 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 20:17:45,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:45,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:45,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:46,031 INFO L124 PetriNetUnfolderBase]: 2738/4035 cut-off events. [2024-06-21 20:17:46,032 INFO L125 PetriNetUnfolderBase]: For 24363/24369 co-relation queries the response was YES. [2024-06-21 20:17:46,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15941 conditions, 4035 events. 2738/4035 cut-off events. For 24363/24369 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19075 event pairs, 869 based on Foata normal form. 14/4045 useless extension candidates. Maximal degree in co-relation 15913. Up to 3710 conditions per place. [2024-06-21 20:17:46,048 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-21 20:17:46,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 762 flow [2024-06-21 20:17:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 20:17:46,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-21 20:17:46,050 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 498 flow. Second operand 7 states and 125 transitions. [2024-06-21 20:17:46,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 762 flow [2024-06-21 20:17:46,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 718 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:46,063 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 514 flow [2024-06-21 20:17:46,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-21 20:17:46,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-21 20:17:46,063 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 514 flow [2024-06-21 20:17:46,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 20:17:46,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:46,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:46,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:17:46,064 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 20:17:46,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash 935164915, now seen corresponding path program 2 times [2024-06-21 20:17:46,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:46,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668810346] [2024-06-21 20:17:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:46,954 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 20:17:46,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:46,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668810346] [2024-06-21 20:17:46,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668810346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:46,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:46,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000823758] [2024-06-21 20:17:46,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:46,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:47,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:47,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 514 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:47,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:47,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:47,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:47,713 INFO L124 PetriNetUnfolderBase]: 2782/4097 cut-off events. [2024-06-21 20:17:47,713 INFO L125 PetriNetUnfolderBase]: For 28396/28398 co-relation queries the response was YES. [2024-06-21 20:17:47,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16616 conditions, 4097 events. 2782/4097 cut-off events. For 28396/28398 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19377 event pairs, 1036 based on Foata normal form. 10/4103 useless extension candidates. Maximal degree in co-relation 16586. Up to 3770 conditions per place. [2024-06-21 20:17:47,731 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 26 changer transitions 0/107 dead transitions. [2024-06-21 20:17:47,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 864 flow [2024-06-21 20:17:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 20:17:47,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 20:17:47,733 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 514 flow. Second operand 7 states and 127 transitions. [2024-06-21 20:17:47,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 864 flow [2024-06-21 20:17:47,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 796 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:47,750 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 536 flow [2024-06-21 20:17:47,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=536, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2024-06-21 20:17:47,750 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-21 20:17:47,750 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 536 flow [2024-06-21 20:17:47,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:47,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:47,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:47,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:17:47,751 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:47,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash 935461585, now seen corresponding path program 3 times [2024-06-21 20:17:47,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:47,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685739090] [2024-06-21 20:17:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:47,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:48,724 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 20:17:48,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:48,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685739090] [2024-06-21 20:17:48,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685739090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:48,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:48,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:48,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355361367] [2024-06-21 20:17:48,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:48,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:48,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:48,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:48,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:48,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:48,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:49,391 INFO L124 PetriNetUnfolderBase]: 2762/4066 cut-off events. [2024-06-21 20:17:49,392 INFO L125 PetriNetUnfolderBase]: For 31610/31610 co-relation queries the response was YES. [2024-06-21 20:17:49,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16755 conditions, 4066 events. 2762/4066 cut-off events. For 31610/31610 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19145 event pairs, 1270 based on Foata normal form. 8/4072 useless extension candidates. Maximal degree in co-relation 16724. Up to 3972 conditions per place. [2024-06-21 20:17:49,410 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-21 20:17:49,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 786 flow [2024-06-21 20:17:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 20:17:49,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-21 20:17:49,412 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 536 flow. Second operand 7 states and 116 transitions. [2024-06-21 20:17:49,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 786 flow [2024-06-21 20:17:49,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 702 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:49,438 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 488 flow [2024-06-21 20:17:49,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=488, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-06-21 20:17:49,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-21 20:17:49,438 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 488 flow [2024-06-21 20:17:49,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:49,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:49,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:49,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:17:49,439 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 20:17:49,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash 935472497, now seen corresponding path program 1 times [2024-06-21 20:17:49,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:49,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232845999] [2024-06-21 20:17:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:49,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:50,712 INFO 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 20:17:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232845999] [2024-06-21 20:17:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232845999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:50,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:50,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:17:50,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315972265] [2024-06-21 20:17:50,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:50,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:17:50,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:17:50,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:17:50,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:50,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 488 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:50,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:50,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:50,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:51,399 INFO L124 PetriNetUnfolderBase]: 2754/4054 cut-off events. [2024-06-21 20:17:51,400 INFO L125 PetriNetUnfolderBase]: For 34657/34657 co-relation queries the response was YES. [2024-06-21 20:17:51,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16792 conditions, 4054 events. 2754/4054 cut-off events. For 34657/34657 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19081 event pairs, 1248 based on Foata normal form. 4/4056 useless extension candidates. Maximal degree in co-relation 16760. Up to 3988 conditions per place. [2024-06-21 20:17:51,417 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 85 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-21 20:17:51,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 764 flow [2024-06-21 20:17:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 20:17:51,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-21 20:17:51,419 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 488 flow. Second operand 7 states and 114 transitions. [2024-06-21 20:17:51,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 764 flow [2024-06-21 20:17:51,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 101 transitions, 704 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:17:51,437 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 491 flow [2024-06-21 20:17:51,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=491, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-21 20:17:51,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-21 20:17:51,438 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 491 flow [2024-06-21 20:17:51,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:51,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:51,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:51,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:17:51,438 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:51,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash 199629376, now seen corresponding path program 1 times [2024-06-21 20:17:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:51,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550552923] [2024-06-21 20:17:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:52,092 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 20:17:52,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550552923] [2024-06-21 20:17:52,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550552923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:52,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425133496] [2024-06-21 20:17:52,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:52,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:52,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:52,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:17:52,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 491 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:52,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:52,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:17:52,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:52,629 INFO L124 PetriNetUnfolderBase]: 2584/3873 cut-off events. [2024-06-21 20:17:52,630 INFO L125 PetriNetUnfolderBase]: For 38914/38924 co-relation queries the response was YES. [2024-06-21 20:17:52,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16480 conditions, 3873 events. 2584/3873 cut-off events. For 38914/38924 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18843 event pairs, 1321 based on Foata normal form. 1/3858 useless extension candidates. Maximal degree in co-relation 16449. Up to 3801 conditions per place. [2024-06-21 20:17:52,654 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 70 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2024-06-21 20:17:52,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 697 flow [2024-06-21 20:17:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 20:17:52,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-21 20:17:52,656 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 491 flow. Second operand 6 states and 96 transitions. [2024-06-21 20:17:52,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 697 flow [2024-06-21 20:17:52,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 652 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:52,677 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 502 flow [2024-06-21 20:17:52,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-21 20:17:52,678 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-21 20:17:52,678 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 502 flow [2024-06-21 20:17:52,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:52,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:52,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:52,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:17:52,678 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:52,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1255790541, now seen corresponding path program 1 times [2024-06-21 20:17:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:52,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51895378] [2024-06-21 20:17:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:53,222 INFO 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 20:17:53,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51895378] [2024-06-21 20:17:53,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51895378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:53,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:53,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274338366] [2024-06-21 20:17:53,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:53,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:53,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:53,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:53,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:17:53,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:53,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:53,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:17:53,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:53,793 INFO L124 PetriNetUnfolderBase]: 2599/3898 cut-off events. [2024-06-21 20:17:53,794 INFO L125 PetriNetUnfolderBase]: For 43415/43424 co-relation queries the response was YES. [2024-06-21 20:17:53,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17181 conditions, 3898 events. 2599/3898 cut-off events. For 43415/43424 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18969 event pairs, 1010 based on Foata normal form. 7/3892 useless extension candidates. Maximal degree in co-relation 17149. Up to 3774 conditions per place. [2024-06-21 20:17:53,818 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 80 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-06-21 20:17:53,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 106 transitions, 777 flow [2024-06-21 20:17:53,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 20:17:53,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 20:17:53,820 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 502 flow. Second operand 6 states and 106 transitions. [2024-06-21 20:17:53,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 106 transitions, 777 flow [2024-06-21 20:17:53,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 106 transitions, 743 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:53,842 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 557 flow [2024-06-21 20:17:53,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=557, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-21 20:17:53,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-21 20:17:53,843 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 557 flow [2024-06-21 20:17:53,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:53,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:53,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:53,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:17:53,844 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 20:17:53,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1893529423, now seen corresponding path program 2 times [2024-06-21 20:17:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:53,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283411419] [2024-06-21 20:17:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:54,403 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 20:17:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:54,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283411419] [2024-06-21 20:17:54,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283411419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:54,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:54,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:54,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574315329] [2024-06-21 20:17:54,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:54,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:54,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:17:54,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 557 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:54,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:54,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:17:54,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:55,068 INFO L124 PetriNetUnfolderBase]: 2621/3936 cut-off events. [2024-06-21 20:17:55,068 INFO L125 PetriNetUnfolderBase]: For 49572/49584 co-relation queries the response was YES. [2024-06-21 20:17:55,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18323 conditions, 3936 events. 2621/3936 cut-off events. For 49572/49584 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19166 event pairs, 1013 based on Foata normal form. 10/3934 useless extension candidates. Maximal degree in co-relation 18289. Up to 3731 conditions per place. [2024-06-21 20:17:55,087 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 76 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-21 20:17:55,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 111 transitions, 897 flow [2024-06-21 20:17:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 20:17:55,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-21 20:17:55,089 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 557 flow. Second operand 6 states and 107 transitions. [2024-06-21 20:17:55,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 111 transitions, 897 flow [2024-06-21 20:17:55,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 865 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:55,111 INFO L231 Difference]: Finished difference. Result has 86 places, 95 transitions, 653 flow [2024-06-21 20:17:55,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=653, PETRI_PLACES=86, PETRI_TRANSITIONS=95} [2024-06-21 20:17:55,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-21 20:17:55,112 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 95 transitions, 653 flow [2024-06-21 20:17:55,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:55,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:55,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:17:55,112 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 20:17:55,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:55,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1893737831, now seen corresponding path program 1 times [2024-06-21 20:17:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:55,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40985040] [2024-06-21 20:17:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:55,580 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 20:17:55,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:55,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40985040] [2024-06-21 20:17:55,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40985040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:55,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:55,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:55,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755689544] [2024-06-21 20:17:55,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:55,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:55,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:55,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:55,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:55,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:55,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 95 transitions, 653 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:55,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:55,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:55,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:56,217 INFO L124 PetriNetUnfolderBase]: 2823/4151 cut-off events. [2024-06-21 20:17:56,217 INFO L125 PetriNetUnfolderBase]: For 55528/55528 co-relation queries the response was YES. [2024-06-21 20:17:56,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20149 conditions, 4151 events. 2823/4151 cut-off events. For 55528/55528 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19460 event pairs, 1146 based on Foata normal form. 4/4153 useless extension candidates. Maximal degree in co-relation 20113. Up to 4118 conditions per place. [2024-06-21 20:17:56,241 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 102 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2024-06-21 20:17:56,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 116 transitions, 962 flow [2024-06-21 20:17:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 20:17:56,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-21 20:17:56,242 INFO L175 Difference]: Start difference. First operand has 86 places, 95 transitions, 653 flow. Second operand 6 states and 97 transitions. [2024-06-21 20:17:56,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 116 transitions, 962 flow [2024-06-21 20:17:56,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 116 transitions, 922 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:56,268 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 698 flow [2024-06-21 20:17:56,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-06-21 20:17:56,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-21 20:17:56,268 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 698 flow [2024-06-21 20:17:56,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:56,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:56,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:56,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:17:56,269 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 20:17:56,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:56,270 INFO L85 PathProgramCache]: Analyzing trace with hash 979250577, now seen corresponding path program 2 times [2024-06-21 20:17:56,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:56,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054861974] [2024-06-21 20:17:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:56,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:56,785 INFO 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 20:17:56,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054861974] [2024-06-21 20:17:56,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054861974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:56,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:56,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:56,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301146249] [2024-06-21 20:17:56,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:56,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:56,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:56,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:56,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:17:56,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 698 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:56,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:56,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:17:56,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:57,365 INFO L124 PetriNetUnfolderBase]: 2835/4169 cut-off events. [2024-06-21 20:17:57,366 INFO L125 PetriNetUnfolderBase]: For 61028/61030 co-relation queries the response was YES. [2024-06-21 20:17:57,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21092 conditions, 4169 events. 2835/4169 cut-off events. For 61028/61030 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19507 event pairs, 1135 based on Foata normal form. 6/4173 useless extension candidates. Maximal degree in co-relation 21053. Up to 4120 conditions per place. [2024-06-21 20:17:57,385 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 100 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-06-21 20:17:57,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 1012 flow [2024-06-21 20:17:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 20:17:57,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 20:17:57,386 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 698 flow. Second operand 6 states and 99 transitions. [2024-06-21 20:17:57,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 1012 flow [2024-06-21 20:17:57,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 978 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:57,415 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 740 flow [2024-06-21 20:17:57,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=740, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-21 20:17:57,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-21 20:17:57,415 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 740 flow [2024-06-21 20:17:57,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:57,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:57,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:17:57,416 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 20:17:57,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1893545295, now seen corresponding path program 1 times [2024-06-21 20:17:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:57,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812091456] [2024-06-21 20:17:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:58,357 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 20:17:58,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:58,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812091456] [2024-06-21 20:17:58,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812091456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:58,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:58,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:58,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501624149] [2024-06-21 20:17:58,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:58,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:58,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:58,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:17:58,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 740 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 20:17:58,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:58,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:17:58,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:59,031 INFO L124 PetriNetUnfolderBase]: 2650/3972 cut-off events. [2024-06-21 20:17:59,031 INFO L125 PetriNetUnfolderBase]: For 66482/66492 co-relation queries the response was YES. [2024-06-21 20:17:59,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20954 conditions, 3972 events. 2650/3972 cut-off events. For 66482/66492 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19212 event pairs, 1135 based on Foata normal form. 1/3957 useless extension candidates. Maximal degree in co-relation 20914. Up to 3891 conditions per place. [2024-06-21 20:17:59,053 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-21 20:17:59,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 117 transitions, 1012 flow [2024-06-21 20:17:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 20:17:59,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-21 20:17:59,056 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 740 flow. Second operand 7 states and 108 transitions. [2024-06-21 20:17:59,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 117 transitions, 1012 flow [2024-06-21 20:17:59,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 117 transitions, 958 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:59,088 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 760 flow [2024-06-21 20:17:59,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=760, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-21 20:17:59,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-21 20:17:59,089 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 760 flow [2024-06-21 20:17:59,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 20:17:59,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:59,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:59,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:17:59,090 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 20:17:59,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash -331167152, now seen corresponding path program 1 times [2024-06-21 20:17:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:59,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28807812] [2024-06-21 20:17:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:59,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:00,140 INFO 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 20:18:00,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:00,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28807812] [2024-06-21 20:18:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28807812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:00,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:00,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:18:00,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767433587] [2024-06-21 20:18:00,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:00,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:18:00,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:18:00,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:18:00,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:00,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 760 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:00,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:00,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:00,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:01,013 INFO L124 PetriNetUnfolderBase]: 2916/4296 cut-off events. [2024-06-21 20:18:01,013 INFO L125 PetriNetUnfolderBase]: For 78192/78192 co-relation queries the response was YES. [2024-06-21 20:18:01,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22994 conditions, 4296 events. 2916/4296 cut-off events. For 78192/78192 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20391 event pairs, 788 based on Foata normal form. 8/4302 useless extension candidates. Maximal degree in co-relation 22953. Up to 4040 conditions per place. [2024-06-21 20:18:01,036 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 128 selfloop transitions, 22 changer transitions 0/153 dead transitions. [2024-06-21 20:18:01,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 153 transitions, 1290 flow [2024-06-21 20:18:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:18:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:18:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 20:18:01,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-21 20:18:01,039 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 760 flow. Second operand 9 states and 155 transitions. [2024-06-21 20:18:01,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 153 transitions, 1290 flow [2024-06-21 20:18:01,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 153 transitions, 1238 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:01,068 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 819 flow [2024-06-21 20:18:01,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=819, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-21 20:18:01,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-21 20:18:01,069 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 819 flow [2024-06-21 20:18:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:01,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:01,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:01,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:18:01,070 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:01,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash -217602992, now seen corresponding path program 2 times [2024-06-21 20:18:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:01,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770162843] [2024-06-21 20:18:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:02,178 INFO 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 20:18:02,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:02,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770162843] [2024-06-21 20:18:02,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770162843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:02,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:02,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:18:02,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558290097] [2024-06-21 20:18:02,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:02,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:18:02,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:18:02,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:18:02,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:02,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 819 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:02,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:02,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:02,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:03,137 INFO L124 PetriNetUnfolderBase]: 2900/4272 cut-off events. [2024-06-21 20:18:03,138 INFO L125 PetriNetUnfolderBase]: For 84525/84525 co-relation queries the response was YES. [2024-06-21 20:18:03,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23412 conditions, 4272 events. 2900/4272 cut-off events. For 84525/84525 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20239 event pairs, 952 based on Foata normal form. 8/4278 useless extension candidates. Maximal degree in co-relation 23370. Up to 4108 conditions per place. [2024-06-21 20:18:03,165 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 124 selfloop transitions, 18 changer transitions 0/145 dead transitions. [2024-06-21 20:18:03,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 145 transitions, 1191 flow [2024-06-21 20:18:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 20:18:03,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-21 20:18:03,166 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 819 flow. Second operand 8 states and 137 transitions. [2024-06-21 20:18:03,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 145 transitions, 1191 flow [2024-06-21 20:18:03,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 145 transitions, 1125 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:03,205 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 796 flow [2024-06-21 20:18:03,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=796, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-21 20:18:03,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-21 20:18:03,206 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 796 flow [2024-06-21 20:18:03,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:03,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:03,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:03,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:18:03,206 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:03,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash -606799524, now seen corresponding path program 1 times [2024-06-21 20:18:03,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:03,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416813480] [2024-06-21 20:18:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:03,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:04,337 INFO 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 20:18:04,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:04,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416813480] [2024-06-21 20:18:04,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416813480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:04,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:04,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:18:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209061230] [2024-06-21 20:18:04,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:18:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:18:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:18:04,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:04,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 796 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:04,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:04,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:04,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:05,278 INFO L124 PetriNetUnfolderBase]: 2944/4336 cut-off events. [2024-06-21 20:18:05,279 INFO L125 PetriNetUnfolderBase]: For 91818/91818 co-relation queries the response was YES. [2024-06-21 20:18:05,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23958 conditions, 4336 events. 2944/4336 cut-off events. For 91818/91818 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20585 event pairs, 967 based on Foata normal form. 8/4342 useless extension candidates. Maximal degree in co-relation 23914. Up to 4172 conditions per place. [2024-06-21 20:18:05,299 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 126 selfloop transitions, 19 changer transitions 0/148 dead transitions. [2024-06-21 20:18:05,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 148 transitions, 1216 flow [2024-06-21 20:18:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:18:05,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 20:18:05,301 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 796 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:18:05,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 148 transitions, 1216 flow [2024-06-21 20:18:05,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 148 transitions, 1175 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:18:05,339 INFO L231 Difference]: Finished difference. Result has 105 places, 114 transitions, 851 flow [2024-06-21 20:18:05,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=105, PETRI_TRANSITIONS=114} [2024-06-21 20:18:05,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-21 20:18:05,339 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 114 transitions, 851 flow [2024-06-21 20:18:05,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:05,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:05,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:05,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:18:05,340 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 20:18:05,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:05,340 INFO L85 PathProgramCache]: Analyzing trace with hash -212841082, now seen corresponding path program 2 times [2024-06-21 20:18:05,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:05,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717441085] [2024-06-21 20:18:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:05,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:06,504 INFO 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 20:18:06,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717441085] [2024-06-21 20:18:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717441085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:06,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:06,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:18:06,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499711921] [2024-06-21 20:18:06,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:06,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:18:06,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:18:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:18:06,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:06,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 114 transitions, 851 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:06,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:06,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:06,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:07,536 INFO L124 PetriNetUnfolderBase]: 3052/4493 cut-off events. [2024-06-21 20:18:07,536 INFO L125 PetriNetUnfolderBase]: For 101625/101627 co-relation queries the response was YES. [2024-06-21 20:18:07,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25661 conditions, 4493 events. 3052/4493 cut-off events. For 101625/101627 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21439 event pairs, 738 based on Foata normal form. 8/4499 useless extension candidates. Maximal degree in co-relation 25616. Up to 3780 conditions per place. [2024-06-21 20:18:07,563 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 117 selfloop transitions, 47 changer transitions 0/167 dead transitions. [2024-06-21 20:18:07,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 1597 flow [2024-06-21 20:18:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:18:07,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:18:07,564 INFO L175 Difference]: Start difference. First operand has 105 places, 114 transitions, 851 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:18:07,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 1597 flow [2024-06-21 20:18:07,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 167 transitions, 1525 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:07,615 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 1037 flow [2024-06-21 20:18:07,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1037, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-06-21 20:18:07,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-21 20:18:07,615 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 1037 flow [2024-06-21 20:18:07,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:07,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:07,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:07,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:18:07,616 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 20:18:07,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash -212834572, now seen corresponding path program 3 times [2024-06-21 20:18:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:07,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266556579] [2024-06-21 20:18:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:07,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:08,667 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 20:18:08,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266556579] [2024-06-21 20:18:08,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266556579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:08,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:08,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:18:08,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538817753] [2024-06-21 20:18:08,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:08,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:18:08,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:18:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:18:08,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:08,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 1037 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:08,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:08,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:08,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:09,660 INFO L124 PetriNetUnfolderBase]: 3032/4465 cut-off events. [2024-06-21 20:18:09,661 INFO L125 PetriNetUnfolderBase]: For 110369/110371 co-relation queries the response was YES. [2024-06-21 20:18:09,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26143 conditions, 4465 events. 3032/4465 cut-off events. For 110369/110371 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21265 event pairs, 759 based on Foata normal form. 8/4471 useless extension candidates. Maximal degree in co-relation 26097. Up to 3768 conditions per place. [2024-06-21 20:18:09,758 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 113 selfloop transitions, 48 changer transitions 0/164 dead transitions. [2024-06-21 20:18:09,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 164 transitions, 1547 flow [2024-06-21 20:18:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:18:09,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:18:09,760 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 1037 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:18:09,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 164 transitions, 1547 flow [2024-06-21 20:18:09,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 164 transitions, 1438 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:09,826 INFO L231 Difference]: Finished difference. Result has 112 places, 123 transitions, 1032 flow [2024-06-21 20:18:09,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1032, PETRI_PLACES=112, PETRI_TRANSITIONS=123} [2024-06-21 20:18:09,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 20:18:09,827 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 123 transitions, 1032 flow [2024-06-21 20:18:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:09,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:09,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:18:09,828 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:09,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash -968510436, now seen corresponding path program 3 times [2024-06-21 20:18:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:09,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578556641] [2024-06-21 20:18:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:10,786 INFO 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 20:18:10,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:10,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578556641] [2024-06-21 20:18:10,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578556641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:10,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:10,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:18:10,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482128228] [2024-06-21 20:18:10,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:10,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:18:10,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:10,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:18:10,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:18:10,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:10,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 123 transitions, 1032 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:10,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:10,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:10,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:11,844 INFO L124 PetriNetUnfolderBase]: 3066/4519 cut-off events. [2024-06-21 20:18:11,844 INFO L125 PetriNetUnfolderBase]: For 117551/117553 co-relation queries the response was YES. [2024-06-21 20:18:11,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26741 conditions, 4519 events. 3066/4519 cut-off events. For 117551/117553 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 21616 event pairs, 817 based on Foata normal form. 8/4525 useless extension candidates. Maximal degree in co-relation 26693. Up to 4152 conditions per place. [2024-06-21 20:18:11,870 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 126 selfloop transitions, 32 changer transitions 0/161 dead transitions. [2024-06-21 20:18:11,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 161 transitions, 1482 flow [2024-06-21 20:18:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:18:11,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 20:18:11,872 INFO L175 Difference]: Start difference. First operand has 112 places, 123 transitions, 1032 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:18:11,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 161 transitions, 1482 flow [2024-06-21 20:18:11,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 161 transitions, 1378 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:18:11,933 INFO L231 Difference]: Finished difference. Result has 113 places, 125 transitions, 1039 flow [2024-06-21 20:18:11,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1039, PETRI_PLACES=113, PETRI_TRANSITIONS=125} [2024-06-21 20:18:11,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 20:18:11,933 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 125 transitions, 1039 flow [2024-06-21 20:18:11,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:11,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:11,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:11,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:18:11,934 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 20:18:11,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1443950221, now seen corresponding path program 1 times [2024-06-21 20:18:11,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:11,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587005342] [2024-06-21 20:18:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:11,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587005342] [2024-06-21 20:18:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587005342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:12,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:12,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:12,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196813827] [2024-06-21 20:18:12,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:12,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:12,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:12,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:18:12,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 125 transitions, 1039 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 20:18:12,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:12,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:18:12,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:13,291 INFO L124 PetriNetUnfolderBase]: 2868/4302 cut-off events. [2024-06-21 20:18:13,291 INFO L125 PetriNetUnfolderBase]: For 123400/123415 co-relation queries the response was YES. [2024-06-21 20:18:13,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26142 conditions, 4302 events. 2868/4302 cut-off events. For 123400/123415 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21257 event pairs, 951 based on Foata normal form. 3/4282 useless extension candidates. Maximal degree in co-relation 26093. Up to 4165 conditions per place. [2024-06-21 20:18:13,322 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 118 selfloop transitions, 18 changer transitions 0/146 dead transitions. [2024-06-21 20:18:13,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 146 transitions, 1395 flow [2024-06-21 20:18:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 20:18:13,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 20:18:13,324 INFO L175 Difference]: Start difference. First operand has 113 places, 125 transitions, 1039 flow. Second operand 6 states and 106 transitions. [2024-06-21 20:18:13,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 146 transitions, 1395 flow [2024-06-21 20:18:13,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 146 transitions, 1302 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:13,401 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 1037 flow [2024-06-21 20:18:13,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1037, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2024-06-21 20:18:13,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 20:18:13,402 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 1037 flow [2024-06-21 20:18:13,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 20:18:13,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:13,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:18:13,403 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:13,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:13,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1714123058, now seen corresponding path program 1 times [2024-06-21 20:18:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:13,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268209468] [2024-06-21 20:18:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:14,609 INFO 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 20:18:14,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:14,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268209468] [2024-06-21 20:18:14,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268209468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:14,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:14,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:18:14,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988941419] [2024-06-21 20:18:14,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:14,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:18:14,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:18:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:18:14,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:14,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 1037 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:14,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:14,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:14,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:15,524 INFO L124 PetriNetUnfolderBase]: 3091/4561 cut-off events. [2024-06-21 20:18:15,525 INFO L125 PetriNetUnfolderBase]: For 132606/132608 co-relation queries the response was YES. [2024-06-21 20:18:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27456 conditions, 4561 events. 3091/4561 cut-off events. For 132606/132608 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21889 event pairs, 960 based on Foata normal form. 8/4567 useless extension candidates. Maximal degree in co-relation 27406. Up to 4206 conditions per place. [2024-06-21 20:18:15,554 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 131 selfloop transitions, 32 changer transitions 0/166 dead transitions. [2024-06-21 20:18:15,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 166 transitions, 1495 flow [2024-06-21 20:18:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:18:15,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 20:18:15,555 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 1037 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:18:15,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 166 transitions, 1495 flow [2024-06-21 20:18:15,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 166 transitions, 1446 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:15,634 INFO L231 Difference]: Finished difference. Result has 117 places, 130 transitions, 1097 flow [2024-06-21 20:18:15,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1097, PETRI_PLACES=117, PETRI_TRANSITIONS=130} [2024-06-21 20:18:15,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-21 20:18:15,635 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 130 transitions, 1097 flow [2024-06-21 20:18:15,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:15,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:15,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:15,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:18:15,635 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 20:18:15,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:15,635 INFO L85 PathProgramCache]: Analyzing trace with hash -121523425, now seen corresponding path program 1 times [2024-06-21 20:18:15,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:15,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003440794] [2024-06-21 20:18:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:15,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:16,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003440794] [2024-06-21 20:18:16,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003440794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:16,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:16,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:16,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520917529] [2024-06-21 20:18:16,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:16,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:18:16,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 130 transitions, 1097 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 20:18:16,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:16,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:18:16,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:16,973 INFO L124 PetriNetUnfolderBase]: 2940/4397 cut-off events. [2024-06-21 20:18:16,973 INFO L125 PetriNetUnfolderBase]: For 139932/139950 co-relation queries the response was YES. [2024-06-21 20:18:16,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27311 conditions, 4397 events. 2940/4397 cut-off events. For 139932/139950 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21582 event pairs, 945 based on Foata normal form. 7/4375 useless extension candidates. Maximal degree in co-relation 27260. Up to 4215 conditions per place. [2024-06-21 20:18:17,000 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 124 selfloop transitions, 19 changer transitions 0/154 dead transitions. [2024-06-21 20:18:17,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 154 transitions, 1473 flow [2024-06-21 20:18:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:18:17,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 20:18:17,001 INFO L175 Difference]: Start difference. First operand has 117 places, 130 transitions, 1097 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:18:17,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 154 transitions, 1473 flow [2024-06-21 20:18:17,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1382 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:17,069 INFO L231 Difference]: Finished difference. Result has 118 places, 133 transitions, 1092 flow [2024-06-21 20:18:17,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=118, PETRI_TRANSITIONS=133} [2024-06-21 20:18:17,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-21 20:18:17,070 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 133 transitions, 1092 flow [2024-06-21 20:18:17,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 20:18:17,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:17,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:17,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:18:17,071 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:17,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -813076712, now seen corresponding path program 4 times [2024-06-21 20:18:17,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:17,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908692651] [2024-06-21 20:18:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:17,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:18,037 INFO 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 20:18:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908692651] [2024-06-21 20:18:18,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908692651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:18,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:18,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:18:18,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240092090] [2024-06-21 20:18:18,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:18:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:18:18,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:18:18,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:18,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 133 transitions, 1092 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:18,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:18,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:18,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:18,886 INFO L124 PetriNetUnfolderBase]: 3155/4652 cut-off events. [2024-06-21 20:18:18,886 INFO L125 PetriNetUnfolderBase]: For 150621/150621 co-relation queries the response was YES. [2024-06-21 20:18:18,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28733 conditions, 4652 events. 3155/4652 cut-off events. For 150621/150621 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 22312 event pairs, 1083 based on Foata normal form. 8/4658 useless extension candidates. Maximal degree in co-relation 28681. Up to 4512 conditions per place. [2024-06-21 20:18:18,916 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 142 selfloop transitions, 19 changer transitions 0/164 dead transitions. [2024-06-21 20:18:18,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 164 transitions, 1540 flow [2024-06-21 20:18:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:18:18,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 20:18:18,917 INFO L175 Difference]: Start difference. First operand has 118 places, 133 transitions, 1092 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:18:18,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 164 transitions, 1540 flow [2024-06-21 20:18:18,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 164 transitions, 1482 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:18,982 INFO L231 Difference]: Finished difference. Result has 121 places, 136 transitions, 1142 flow [2024-06-21 20:18:18,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=121, PETRI_TRANSITIONS=136} [2024-06-21 20:18:18,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-21 20:18:18,992 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 136 transitions, 1142 flow [2024-06-21 20:18:18,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:18,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:18,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:18,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:18:18,993 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:18,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1677115984, now seen corresponding path program 4 times [2024-06-21 20:18:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:18,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236146809] [2024-06-21 20:18:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:20,078 INFO 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 20:18:20,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:20,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236146809] [2024-06-21 20:18:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236146809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:20,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:20,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:18:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788545436] [2024-06-21 20:18:20,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:20,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:18:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:18:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:18:20,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:20,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 1142 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:20,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:20,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:20,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:21,132 INFO L124 PetriNetUnfolderBase]: 3139/4633 cut-off events. [2024-06-21 20:18:21,133 INFO L125 PetriNetUnfolderBase]: For 157610/157615 co-relation queries the response was YES. [2024-06-21 20:18:21,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28759 conditions, 4633 events. 3139/4633 cut-off events. For 157610/157615 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22101 event pairs, 874 based on Foata normal form. 10/4640 useless extension candidates. Maximal degree in co-relation 28706. Up to 4262 conditions per place. [2024-06-21 20:18:21,165 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 32 changer transitions 0/171 dead transitions. [2024-06-21 20:18:21,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 171 transitions, 1610 flow [2024-06-21 20:18:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:18:21,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 20:18:21,166 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 1142 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:18:21,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 171 transitions, 1610 flow [2024-06-21 20:18:21,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1532 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:21,256 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1181 flow [2024-06-21 20:18:21,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1181, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2024-06-21 20:18:21,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-21 20:18:21,257 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1181 flow [2024-06-21 20:18:21,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:21,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:21,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:21,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:18:21,258 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:21,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:21,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1987812778, now seen corresponding path program 2 times [2024-06-21 20:18:21,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:21,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498342318] [2024-06-21 20:18:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:21,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:22,518 INFO 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 20:18:22,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:22,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498342318] [2024-06-21 20:18:22,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498342318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:22,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:22,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:18:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668029812] [2024-06-21 20:18:22,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:18:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:18:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:18:22,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:22,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1181 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:22,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:22,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:22,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:23,481 INFO L124 PetriNetUnfolderBase]: 3173/4682 cut-off events. [2024-06-21 20:18:23,481 INFO L125 PetriNetUnfolderBase]: For 168768/168768 co-relation queries the response was YES. [2024-06-21 20:18:23,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29466 conditions, 4682 events. 3173/4682 cut-off events. For 168768/168768 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22530 event pairs, 1104 based on Foata normal form. 8/4688 useless extension candidates. Maximal degree in co-relation 29412. Up to 4542 conditions per place. [2024-06-21 20:18:23,514 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 147 selfloop transitions, 18 changer transitions 0/168 dead transitions. [2024-06-21 20:18:23,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 168 transitions, 1623 flow [2024-06-21 20:18:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 20:18:23,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-21 20:18:23,516 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1181 flow. Second operand 8 states and 131 transitions. [2024-06-21 20:18:23,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 168 transitions, 1623 flow [2024-06-21 20:18:23,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 168 transitions, 1524 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:23,610 INFO L231 Difference]: Finished difference. Result has 125 places, 140 transitions, 1169 flow [2024-06-21 20:18:23,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1169, PETRI_PLACES=125, PETRI_TRANSITIONS=140} [2024-06-21 20:18:23,611 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-21 20:18:23,611 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 140 transitions, 1169 flow [2024-06-21 20:18:23,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:23,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:23,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:23,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:18:23,613 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:23,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1677293924, now seen corresponding path program 5 times [2024-06-21 20:18:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:23,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184974335] [2024-06-21 20:18:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:24,735 INFO 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 20:18:24,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:24,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184974335] [2024-06-21 20:18:24,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184974335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:24,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:24,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:18:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471888415] [2024-06-21 20:18:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:24,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:18:24,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:18:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:18:24,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:24,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 140 transitions, 1169 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:24,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:24,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:24,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:25,677 INFO L124 PetriNetUnfolderBase]: 3217/4751 cut-off events. [2024-06-21 20:18:25,677 INFO L125 PetriNetUnfolderBase]: For 180382/180387 co-relation queries the response was YES. [2024-06-21 20:18:25,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30138 conditions, 4751 events. 3217/4751 cut-off events. For 180382/180387 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22876 event pairs, 770 based on Foata normal form. 10/4758 useless extension candidates. Maximal degree in co-relation 30083. Up to 3978 conditions per place. [2024-06-21 20:18:25,712 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 124 selfloop transitions, 54 changer transitions 0/181 dead transitions. [2024-06-21 20:18:25,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 181 transitions, 1795 flow [2024-06-21 20:18:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:18:25,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:18:25,713 INFO L175 Difference]: Start difference. First operand has 125 places, 140 transitions, 1169 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:18:25,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 181 transitions, 1795 flow [2024-06-21 20:18:25,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 181 transitions, 1726 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:25,816 INFO L231 Difference]: Finished difference. Result has 127 places, 143 transitions, 1278 flow [2024-06-21 20:18:25,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1278, PETRI_PLACES=127, PETRI_TRANSITIONS=143} [2024-06-21 20:18:25,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-21 20:18:25,817 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 143 transitions, 1278 flow [2024-06-21 20:18:25,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:25,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:25,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:25,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:18:25,817 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:25,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:25,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1340952720, now seen corresponding path program 3 times [2024-06-21 20:18:25,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:25,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741982208] [2024-06-21 20:18:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:25,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:26,892 INFO 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 20:18:26,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:26,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741982208] [2024-06-21 20:18:26,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741982208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:26,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:26,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:18:26,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792728252] [2024-06-21 20:18:26,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:26,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:18:26,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:26,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:18:26,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:18:26,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:26,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 143 transitions, 1278 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:26,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:26,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:26,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:27,813 INFO L124 PetriNetUnfolderBase]: 3251/4800 cut-off events. [2024-06-21 20:18:27,813 INFO L125 PetriNetUnfolderBase]: For 191083/191083 co-relation queries the response was YES. [2024-06-21 20:18:27,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30963 conditions, 4800 events. 3251/4800 cut-off events. For 191083/191083 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23218 event pairs, 1071 based on Foata normal form. 8/4806 useless extension candidates. Maximal degree in co-relation 30907. Up to 4596 conditions per place. [2024-06-21 20:18:27,848 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 154 selfloop transitions, 22 changer transitions 0/179 dead transitions. [2024-06-21 20:18:27,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 1762 flow [2024-06-21 20:18:27,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:18:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:18:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 20:18:27,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-21 20:18:27,850 INFO L175 Difference]: Start difference. First operand has 127 places, 143 transitions, 1278 flow. Second operand 9 states and 147 transitions. [2024-06-21 20:18:27,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 1762 flow [2024-06-21 20:18:27,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 1583 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:27,993 INFO L231 Difference]: Finished difference. Result has 130 places, 145 transitions, 1198 flow [2024-06-21 20:18:27,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1198, PETRI_PLACES=130, PETRI_TRANSITIONS=145} [2024-06-21 20:18:27,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-21 20:18:27,993 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 145 transitions, 1198 flow [2024-06-21 20:18:27,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:27,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:27,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:27,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:18:27,994 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:27,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1045137762, now seen corresponding path program 6 times [2024-06-21 20:18:27,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:27,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225769644] [2024-06-21 20:18:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:27,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:28,961 INFO 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 20:18:28,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225769644] [2024-06-21 20:18:28,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225769644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:28,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:28,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:18:28,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356249573] [2024-06-21 20:18:28,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:28,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:18:28,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:18:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:18:29,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:29,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 145 transitions, 1198 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:29,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:29,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:29,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:29,892 INFO L124 PetriNetUnfolderBase]: 3231/4777 cut-off events. [2024-06-21 20:18:29,892 INFO L125 PetriNetUnfolderBase]: For 197185/197190 co-relation queries the response was YES. [2024-06-21 20:18:29,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30557 conditions, 4777 events. 3231/4777 cut-off events. For 197185/197190 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23085 event pairs, 752 based on Foata normal form. 10/4784 useless extension candidates. Maximal degree in co-relation 30500. Up to 4020 conditions per place. [2024-06-21 20:18:29,925 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 126 selfloop transitions, 53 changer transitions 0/182 dead transitions. [2024-06-21 20:18:29,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 182 transitions, 1652 flow [2024-06-21 20:18:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:18:29,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:18:29,926 INFO L175 Difference]: Start difference. First operand has 130 places, 145 transitions, 1198 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:18:29,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 182 transitions, 1652 flow [2024-06-21 20:18:30,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 182 transitions, 1541 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 20:18:30,039 INFO L231 Difference]: Finished difference. Result has 131 places, 145 transitions, 1201 flow [2024-06-21 20:18:30,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1201, PETRI_PLACES=131, PETRI_TRANSITIONS=145} [2024-06-21 20:18:30,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-21 20:18:30,040 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 145 transitions, 1201 flow [2024-06-21 20:18:30,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:30,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:30,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:30,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:18:30,041 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:30,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:30,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1045377330, now seen corresponding path program 4 times [2024-06-21 20:18:30,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:30,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418593212] [2024-06-21 20:18:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:30,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:31,338 INFO 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 20:18:31,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:31,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418593212] [2024-06-21 20:18:31,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418593212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:31,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:31,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:18:31,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112736283] [2024-06-21 20:18:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:31,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:18:31,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:18:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:18:31,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:31,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 145 transitions, 1201 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:31,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:31,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:31,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:32,290 INFO L124 PetriNetUnfolderBase]: 3215/4751 cut-off events. [2024-06-21 20:18:32,290 INFO L125 PetriNetUnfolderBase]: For 202147/202152 co-relation queries the response was YES. [2024-06-21 20:18:32,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30491 conditions, 4751 events. 3215/4751 cut-off events. For 202147/202152 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22932 event pairs, 965 based on Foata normal form. 10/4758 useless extension candidates. Maximal degree in co-relation 30433. Up to 4394 conditions per place. [2024-06-21 20:18:32,322 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 145 selfloop transitions, 32 changer transitions 0/180 dead transitions. [2024-06-21 20:18:32,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 180 transitions, 1693 flow [2024-06-21 20:18:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:18:32,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 20:18:32,323 INFO L175 Difference]: Start difference. First operand has 131 places, 145 transitions, 1201 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:18:32,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 180 transitions, 1693 flow [2024-06-21 20:18:32,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 180 transitions, 1569 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:18:32,425 INFO L231 Difference]: Finished difference. Result has 132 places, 147 transitions, 1200 flow [2024-06-21 20:18:32,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1200, PETRI_PLACES=132, PETRI_TRANSITIONS=147} [2024-06-21 20:18:32,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-21 20:18:32,426 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 147 transitions, 1200 flow [2024-06-21 20:18:32,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:32,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:32,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:32,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:18:32,427 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 20:18:32,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash 291783455, now seen corresponding path program 2 times [2024-06-21 20:18:32,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:32,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94639533] [2024-06-21 20:18:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:33,142 INFO 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 20:18:33,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:33,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94639533] [2024-06-21 20:18:33,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94639533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:33,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:33,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:33,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181514326] [2024-06-21 20:18:33,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:33,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:33,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:33,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:18:33,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 147 transitions, 1200 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 20:18:33,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:33,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:18:33,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:33,889 INFO L124 PetriNetUnfolderBase]: 3038/4554 cut-off events. [2024-06-21 20:18:33,889 INFO L125 PetriNetUnfolderBase]: For 209992/210018 co-relation queries the response was YES. [2024-06-21 20:18:33,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29558 conditions, 4554 events. 3038/4554 cut-off events. For 209992/210018 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22597 event pairs, 967 based on Foata normal form. 7/4528 useless extension candidates. Maximal degree in co-relation 29499. Up to 4333 conditions per place. [2024-06-21 20:18:33,918 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 129 selfloop transitions, 26 changer transitions 0/169 dead transitions. [2024-06-21 20:18:33,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 169 transitions, 1606 flow [2024-06-21 20:18:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:33,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 20:18:33,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-21 20:18:33,920 INFO L175 Difference]: Start difference. First operand has 132 places, 147 transitions, 1200 flow. Second operand 7 states and 118 transitions. [2024-06-21 20:18:33,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 169 transitions, 1606 flow [2024-06-21 20:18:34,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 169 transitions, 1501 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:34,022 INFO L231 Difference]: Finished difference. Result has 134 places, 152 transitions, 1219 flow [2024-06-21 20:18:34,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1219, PETRI_PLACES=134, PETRI_TRANSITIONS=152} [2024-06-21 20:18:34,023 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-21 20:18:34,023 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 152 transitions, 1219 flow [2024-06-21 20:18:34,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 20:18:34,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:34,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:34,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:18:34,024 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 20:18:34,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:34,025 INFO L85 PathProgramCache]: Analyzing trace with hash 85339482, now seen corresponding path program 1 times [2024-06-21 20:18:34,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:34,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045309938] [2024-06-21 20:18:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:34,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:34,619 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 20:18:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045309938] [2024-06-21 20:18:34,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045309938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:34,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:34,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:34,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437501945] [2024-06-21 20:18:34,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:34,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:34,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 152 transitions, 1219 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:34,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:34,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:34,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:35,437 INFO L124 PetriNetUnfolderBase]: 3218/4753 cut-off events. [2024-06-21 20:18:35,438 INFO L125 PetriNetUnfolderBase]: For 217600/217600 co-relation queries the response was YES. [2024-06-21 20:18:35,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30721 conditions, 4753 events. 3218/4753 cut-off events. For 217600/217600 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22943 event pairs, 1096 based on Foata normal form. 3/4754 useless extension candidates. Maximal degree in co-relation 30660. Up to 4680 conditions per place. [2024-06-21 20:18:35,475 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 150 selfloop transitions, 18 changer transitions 0/171 dead transitions. [2024-06-21 20:18:35,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 171 transitions, 1653 flow [2024-06-21 20:18:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 20:18:35,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-21 20:18:35,480 INFO L175 Difference]: Start difference. First operand has 134 places, 152 transitions, 1219 flow. Second operand 6 states and 100 transitions. [2024-06-21 20:18:35,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 171 transitions, 1653 flow [2024-06-21 20:18:35,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 171 transitions, 1579 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:35,668 INFO L231 Difference]: Finished difference. Result has 136 places, 155 transitions, 1244 flow [2024-06-21 20:18:35,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1244, PETRI_PLACES=136, PETRI_TRANSITIONS=155} [2024-06-21 20:18:35,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-21 20:18:35,669 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 155 transitions, 1244 flow [2024-06-21 20:18:35,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:35,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:35,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:35,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:18:35,670 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 20:18:35,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1437264513, now seen corresponding path program 1 times [2024-06-21 20:18:35,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:35,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283107991] [2024-06-21 20:18:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:36,233 INFO 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 20:18:36,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:36,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283107991] [2024-06-21 20:18:36,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283107991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:36,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:36,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146052458] [2024-06-21 20:18:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:36,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:36,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:36,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:36,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:36,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 155 transitions, 1244 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:36,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:36,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:36,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:37,018 INFO L124 PetriNetUnfolderBase]: 3288/4854 cut-off events. [2024-06-21 20:18:37,018 INFO L125 PetriNetUnfolderBase]: For 233040/233045 co-relation queries the response was YES. [2024-06-21 20:18:37,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31978 conditions, 4854 events. 3288/4854 cut-off events. For 233040/233045 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 23486 event pairs, 1071 based on Foata normal form. 8/4859 useless extension candidates. Maximal degree in co-relation 31916. Up to 4610 conditions per place. [2024-06-21 20:18:37,057 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 156 selfloop transitions, 27 changer transitions 0/186 dead transitions. [2024-06-21 20:18:37,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 186 transitions, 1894 flow [2024-06-21 20:18:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 20:18:37,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-21 20:18:37,059 INFO L175 Difference]: Start difference. First operand has 136 places, 155 transitions, 1244 flow. Second operand 7 states and 117 transitions. [2024-06-21 20:18:37,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 186 transitions, 1894 flow [2024-06-21 20:18:37,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 186 transitions, 1791 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:37,188 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1367 flow [2024-06-21 20:18:37,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1367, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-06-21 20:18:37,189 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-21 20:18:37,189 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1367 flow [2024-06-21 20:18:37,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:37,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:37,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:37,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:18:37,190 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 20:18:37,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:37,190 INFO L85 PathProgramCache]: Analyzing trace with hash 292265629, now seen corresponding path program 2 times [2024-06-21 20:18:37,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:37,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901170721] [2024-06-21 20:18:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:37,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:37,824 INFO 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 20:18:37,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:37,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901170721] [2024-06-21 20:18:37,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901170721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:37,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:37,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:37,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50193249] [2024-06-21 20:18:37,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:37,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:37,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:37,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:37,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1367 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:37,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:37,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:38,582 INFO L124 PetriNetUnfolderBase]: 3313/4887 cut-off events. [2024-06-21 20:18:38,582 INFO L125 PetriNetUnfolderBase]: For 233732/233734 co-relation queries the response was YES. [2024-06-21 20:18:38,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32533 conditions, 4887 events. 3313/4887 cut-off events. For 233732/233734 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 23748 event pairs, 1128 based on Foata normal form. 6/4891 useless extension candidates. Maximal degree in co-relation 32469. Up to 4798 conditions per place. [2024-06-21 20:18:38,618 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 163 selfloop transitions, 30 changer transitions 0/196 dead transitions. [2024-06-21 20:18:38,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 196 transitions, 2061 flow [2024-06-21 20:18:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:18:38,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:18:38,619 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1367 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:18:38,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 196 transitions, 2061 flow [2024-06-21 20:18:38,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 196 transitions, 1947 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:38,794 INFO L231 Difference]: Finished difference. Result has 146 places, 174 transitions, 1500 flow [2024-06-21 20:18:38,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1500, PETRI_PLACES=146, PETRI_TRANSITIONS=174} [2024-06-21 20:18:38,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-21 20:18:38,795 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 174 transitions, 1500 flow [2024-06-21 20:18:38,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:38,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:38,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:38,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:18:38,795 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 20:18:38,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash 292275549, now seen corresponding path program 1 times [2024-06-21 20:18:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:38,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770586270] [2024-06-21 20:18:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:39,904 INFO 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 20:18:39,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:39,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770586270] [2024-06-21 20:18:39,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770586270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:39,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:39,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:18:39,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166625474] [2024-06-21 20:18:39,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:39,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:18:39,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:18:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:18:39,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:18:39,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 174 transitions, 1500 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:39,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:39,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:18:39,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:40,737 INFO L124 PetriNetUnfolderBase]: 3106/4649 cut-off events. [2024-06-21 20:18:40,737 INFO L125 PetriNetUnfolderBase]: For 244730/244759 co-relation queries the response was YES. [2024-06-21 20:18:40,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31762 conditions, 4649 events. 3106/4649 cut-off events. For 244730/244759 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23265 event pairs, 1140 based on Foata normal form. 3/4611 useless extension candidates. Maximal degree in co-relation 31695. Up to 4516 conditions per place. [2024-06-21 20:18:40,837 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 155 selfloop transitions, 16 changer transitions 0/187 dead transitions. [2024-06-21 20:18:40,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 187 transitions, 1908 flow [2024-06-21 20:18:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 20:18:40,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-21 20:18:40,838 INFO L175 Difference]: Start difference. First operand has 146 places, 174 transitions, 1500 flow. Second operand 7 states and 109 transitions. [2024-06-21 20:18:40,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 187 transitions, 1908 flow [2024-06-21 20:18:40,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 187 transitions, 1833 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:40,961 INFO L231 Difference]: Finished difference. Result has 149 places, 177 transitions, 1513 flow [2024-06-21 20:18:40,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1513, PETRI_PLACES=149, PETRI_TRANSITIONS=177} [2024-06-21 20:18:40,962 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-21 20:18:40,962 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 177 transitions, 1513 flow [2024-06-21 20:18:40,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:40,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:40,963 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 20:18:40,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:18:40,963 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 20:18:40,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash 527354781, now seen corresponding path program 1 times [2024-06-21 20:18:40,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:40,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118092091] [2024-06-21 20:18:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:40,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:41,874 INFO 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 20:18:41,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:41,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118092091] [2024-06-21 20:18:41,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118092091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:41,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:41,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:18:41,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108674470] [2024-06-21 20:18:41,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:41,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:18:41,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:18:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:18:41,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:18:41,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 177 transitions, 1513 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:41,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:41,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:18:41,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:42,737 INFO L124 PetriNetUnfolderBase]: 3097/4642 cut-off events. [2024-06-21 20:18:42,737 INFO L125 PetriNetUnfolderBase]: For 254232/254256 co-relation queries the response was YES. [2024-06-21 20:18:42,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32135 conditions, 4642 events. 3097/4642 cut-off events. For 254232/254256 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23190 event pairs, 953 based on Foata normal form. 6/4616 useless extension candidates. Maximal degree in co-relation 32066. Up to 4428 conditions per place. [2024-06-21 20:18:42,767 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 158 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2024-06-21 20:18:42,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 198 transitions, 1931 flow [2024-06-21 20:18:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:18:42,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 20:18:42,768 INFO L175 Difference]: Start difference. First operand has 149 places, 177 transitions, 1513 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:18:42,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 198 transitions, 1931 flow [2024-06-21 20:18:42,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 198 transitions, 1863 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:42,885 INFO L231 Difference]: Finished difference. Result has 151 places, 177 transitions, 1503 flow [2024-06-21 20:18:42,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1503, PETRI_PLACES=151, PETRI_TRANSITIONS=177} [2024-06-21 20:18:42,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-21 20:18:42,886 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 177 transitions, 1503 flow [2024-06-21 20:18:42,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:42,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:42,887 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 20:18:42,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:18:42,887 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 20:18:42,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:42,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1358280622, now seen corresponding path program 1 times [2024-06-21 20:18:42,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:42,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491963049] [2024-06-21 20:18:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:43,333 INFO 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 20:18:43,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491963049] [2024-06-21 20:18:43,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491963049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:43,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:43,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:43,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076220280] [2024-06-21 20:18:43,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:43,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:43,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:43,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:43,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 177 transitions, 1503 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:43,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:43,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:43,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:44,129 INFO L124 PetriNetUnfolderBase]: 3332/4919 cut-off events. [2024-06-21 20:18:44,129 INFO L125 PetriNetUnfolderBase]: For 269480/269484 co-relation queries the response was YES. [2024-06-21 20:18:44,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34153 conditions, 4919 events. 3332/4919 cut-off events. For 269480/269484 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 24007 event pairs, 1101 based on Foata normal form. 6/4922 useless extension candidates. Maximal degree in co-relation 34083. Up to 4739 conditions per place. [2024-06-21 20:18:44,167 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 177 selfloop transitions, 30 changer transitions 0/210 dead transitions. [2024-06-21 20:18:44,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 210 transitions, 2068 flow [2024-06-21 20:18:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 20:18:44,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 20:18:44,169 INFO L175 Difference]: Start difference. First operand has 151 places, 177 transitions, 1503 flow. Second operand 7 states and 119 transitions. [2024-06-21 20:18:44,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 210 transitions, 2068 flow [2024-06-21 20:18:44,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 210 transitions, 1983 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:44,346 INFO L231 Difference]: Finished difference. Result has 154 places, 187 transitions, 1599 flow [2024-06-21 20:18:44,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1599, PETRI_PLACES=154, PETRI_TRANSITIONS=187} [2024-06-21 20:18:44,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-21 20:18:44,346 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 187 transitions, 1599 flow [2024-06-21 20:18:44,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:44,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:44,347 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 20:18:44,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:18:44,347 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 20:18:44,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash 71152306, now seen corresponding path program 2 times [2024-06-21 20:18:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:44,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620259920] [2024-06-21 20:18:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:44,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:44,954 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 20:18:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620259920] [2024-06-21 20:18:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620259920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:44,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:44,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:18:44,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169752933] [2024-06-21 20:18:44,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:44,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:18:44,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:18:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:18:44,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:44,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 187 transitions, 1599 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:45,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:45,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:45,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:45,890 INFO L124 PetriNetUnfolderBase]: 3384/4991 cut-off events. [2024-06-21 20:18:45,891 INFO L125 PetriNetUnfolderBase]: For 274958/274962 co-relation queries the response was YES. [2024-06-21 20:18:45,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35812 conditions, 4991 events. 3384/4991 cut-off events. For 274958/274962 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 24376 event pairs, 1099 based on Foata normal form. 6/4994 useless extension candidates. Maximal degree in co-relation 35739. Up to 4765 conditions per place. [2024-06-21 20:18:45,933 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 178 selfloop transitions, 38 changer transitions 0/219 dead transitions. [2024-06-21 20:18:45,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 219 transitions, 2334 flow [2024-06-21 20:18:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:18:45,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 20:18:45,935 INFO L175 Difference]: Start difference. First operand has 154 places, 187 transitions, 1599 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:18:45,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 219 transitions, 2334 flow [2024-06-21 20:18:46,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 219 transitions, 2281 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 20:18:46,115 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 1787 flow [2024-06-21 20:18:46,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1787, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-06-21 20:18:46,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 20:18:46,115 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 1787 flow [2024-06-21 20:18:46,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:46,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:46,116 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 20:18:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:18:46,116 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 20:18:46,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:46,116 INFO L85 PathProgramCache]: Analyzing trace with hash 527743056, now seen corresponding path program 1 times [2024-06-21 20:18:46,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:46,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643936077] [2024-06-21 20:18:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:46,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:46,812 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 20:18:46,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:46,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643936077] [2024-06-21 20:18:46,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643936077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:46,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:46,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:46,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128070791] [2024-06-21 20:18:46,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:46,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:46,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:46,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:46,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:46,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:18:46,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 20:18:46,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:46,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:18:46,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:47,700 INFO L124 PetriNetUnfolderBase]: 3221/4814 cut-off events. [2024-06-21 20:18:47,700 INFO L125 PetriNetUnfolderBase]: For 284230/284249 co-relation queries the response was YES. [2024-06-21 20:18:47,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35423 conditions, 4814 events. 3221/4814 cut-off events. For 284230/284249 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 23939 event pairs, 936 based on Foata normal form. 10/4805 useless extension candidates. Maximal degree in co-relation 35347. Up to 4496 conditions per place. [2024-06-21 20:18:47,742 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 154 selfloop transitions, 42 changer transitions 0/216 dead transitions. [2024-06-21 20:18:47,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 216 transitions, 2275 flow [2024-06-21 20:18:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:18:47,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 20:18:47,744 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 1787 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:18:47,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 216 transitions, 2275 flow [2024-06-21 20:18:47,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 216 transitions, 2184 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:47,919 INFO L231 Difference]: Finished difference. Result has 164 places, 199 transitions, 1844 flow [2024-06-21 20:18:47,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1844, PETRI_PLACES=164, PETRI_TRANSITIONS=199} [2024-06-21 20:18:47,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-21 20:18:47,921 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 199 transitions, 1844 flow [2024-06-21 20:18:47,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 20:18:47,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:47,921 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 20:18:47,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:18:47,922 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 20:18:47,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1662610064, now seen corresponding path program 3 times [2024-06-21 20:18:47,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:47,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427795483] [2024-06-21 20:18:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:48,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427795483] [2024-06-21 20:18:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427795483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:48,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:48,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:48,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504462389] [2024-06-21 20:18:48,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:48,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:48,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:48,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:48,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 199 transitions, 1844 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:48,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:48,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:49,281 INFO L124 PetriNetUnfolderBase]: 3392/5001 cut-off events. [2024-06-21 20:18:49,282 INFO L125 PetriNetUnfolderBase]: For 293262/293267 co-relation queries the response was YES. [2024-06-21 20:18:49,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36939 conditions, 5001 events. 3392/5001 cut-off events. For 293262/293267 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24302 event pairs, 1076 based on Foata normal form. 6/5004 useless extension candidates. Maximal degree in co-relation 36861. Up to 4821 conditions per place. [2024-06-21 20:18:49,317 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 28 changer transitions 0/219 dead transitions. [2024-06-21 20:18:49,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 219 transitions, 2344 flow [2024-06-21 20:18:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 20:18:49,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-21 20:18:49,319 INFO L175 Difference]: Start difference. First operand has 164 places, 199 transitions, 1844 flow. Second operand 7 states and 116 transitions. [2024-06-21 20:18:49,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 219 transitions, 2344 flow [2024-06-21 20:18:49,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 219 transitions, 2212 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:49,533 INFO L231 Difference]: Finished difference. Result has 166 places, 199 transitions, 1774 flow [2024-06-21 20:18:49,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1774, PETRI_PLACES=166, PETRI_TRANSITIONS=199} [2024-06-21 20:18:49,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-21 20:18:49,533 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 199 transitions, 1774 flow [2024-06-21 20:18:49,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:49,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:49,534 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 20:18:49,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:18:49,534 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 20:18:49,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:49,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1184032826, now seen corresponding path program 4 times [2024-06-21 20:18:49,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:49,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771163090] [2024-06-21 20:18:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:49,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:50,051 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 20:18:50,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:50,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771163090] [2024-06-21 20:18:50,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771163090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:50,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:50,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:50,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602219767] [2024-06-21 20:18:50,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:50,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:50,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:50,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:50,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 199 transitions, 1774 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:50,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:50,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:50,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:50,930 INFO L124 PetriNetUnfolderBase]: 3422/5043 cut-off events. [2024-06-21 20:18:50,930 INFO L125 PetriNetUnfolderBase]: For 308772/308777 co-relation queries the response was YES. [2024-06-21 20:18:50,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37368 conditions, 5043 events. 3422/5043 cut-off events. For 308772/308777 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24548 event pairs, 1073 based on Foata normal form. 10/5050 useless extension candidates. Maximal degree in co-relation 37289. Up to 4722 conditions per place. [2024-06-21 20:18:50,978 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 182 selfloop transitions, 42 changer transitions 0/227 dead transitions. [2024-06-21 20:18:50,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 227 transitions, 2501 flow [2024-06-21 20:18:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 20:18:50,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-21 20:18:50,979 INFO L175 Difference]: Start difference. First operand has 166 places, 199 transitions, 1774 flow. Second operand 7 states and 118 transitions. [2024-06-21 20:18:50,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 227 transitions, 2501 flow [2024-06-21 20:18:51,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 227 transitions, 2446 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:51,169 INFO L231 Difference]: Finished difference. Result has 169 places, 207 transitions, 1964 flow [2024-06-21 20:18:51,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1964, PETRI_PLACES=169, PETRI_TRANSITIONS=207} [2024-06-21 20:18:51,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-21 20:18:51,169 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 207 transitions, 1964 flow [2024-06-21 20:18:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:51,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:51,170 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 20:18:51,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:18:51,170 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 20:18:51,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash 444017206, now seen corresponding path program 5 times [2024-06-21 20:18:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757633877] [2024-06-21 20:18:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:51,706 INFO 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 20:18:51,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:51,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757633877] [2024-06-21 20:18:51,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757633877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:51,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:51,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:18:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518186335] [2024-06-21 20:18:51,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:18:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:18:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:18:51,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:51,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 207 transitions, 1964 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:51,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:51,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:51,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:52,562 INFO L124 PetriNetUnfolderBase]: 3462/5101 cut-off events. [2024-06-21 20:18:52,562 INFO L125 PetriNetUnfolderBase]: For 324298/324305 co-relation queries the response was YES. [2024-06-21 20:18:52,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38617 conditions, 5101 events. 3462/5101 cut-off events. For 324298/324305 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 24934 event pairs, 1095 based on Foata normal form. 10/5108 useless extension candidates. Maximal degree in co-relation 38537. Up to 4580 conditions per place. [2024-06-21 20:18:52,607 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 186 selfloop transitions, 63 changer transitions 0/252 dead transitions. [2024-06-21 20:18:52,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 252 transitions, 2997 flow [2024-06-21 20:18:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:18:52,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 20:18:52,609 INFO L175 Difference]: Start difference. First operand has 169 places, 207 transitions, 1964 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:18:52,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 252 transitions, 2997 flow [2024-06-21 20:18:52,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 252 transitions, 2869 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:52,868 INFO L231 Difference]: Finished difference. Result has 174 places, 228 transitions, 2295 flow [2024-06-21 20:18:52,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2295, PETRI_PLACES=174, PETRI_TRANSITIONS=228} [2024-06-21 20:18:52,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-21 20:18:52,869 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 228 transitions, 2295 flow [2024-06-21 20:18:52,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:52,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:52,870 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 20:18:52,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:18:52,870 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 20:18:52,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:52,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1384305970, now seen corresponding path program 6 times [2024-06-21 20:18:52,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:52,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34860142] [2024-06-21 20:18:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:52,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:53,425 INFO 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 20:18:53,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:53,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34860142] [2024-06-21 20:18:53,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34860142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:53,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:53,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:53,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136428672] [2024-06-21 20:18:53,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:53,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:53,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:53,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:53,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 228 transitions, 2295 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:53,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:53,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:53,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:54,316 INFO L124 PetriNetUnfolderBase]: 3486/5135 cut-off events. [2024-06-21 20:18:54,316 INFO L125 PetriNetUnfolderBase]: For 337919/337926 co-relation queries the response was YES. [2024-06-21 20:18:54,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39830 conditions, 5135 events. 3486/5135 cut-off events. For 337919/337926 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25176 event pairs, 1100 based on Foata normal form. 10/5142 useless extension candidates. Maximal degree in co-relation 39747. Up to 4601 conditions per place. [2024-06-21 20:18:54,360 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 184 selfloop transitions, 69 changer transitions 0/256 dead transitions. [2024-06-21 20:18:54,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 256 transitions, 3123 flow [2024-06-21 20:18:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 20:18:54,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 20:18:54,363 INFO L175 Difference]: Start difference. First operand has 174 places, 228 transitions, 2295 flow. Second operand 7 states and 119 transitions. [2024-06-21 20:18:54,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 256 transitions, 3123 flow [2024-06-21 20:18:54,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 256 transitions, 2994 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-21 20:18:54,646 INFO L231 Difference]: Finished difference. Result has 180 places, 234 transitions, 2453 flow [2024-06-21 20:18:54,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2453, PETRI_PLACES=180, PETRI_TRANSITIONS=234} [2024-06-21 20:18:54,646 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-21 20:18:54,647 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 234 transitions, 2453 flow [2024-06-21 20:18:54,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:54,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:54,647 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 20:18:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:18:54,647 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 20:18:54,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1369059922, now seen corresponding path program 2 times [2024-06-21 20:18:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:54,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816006289] [2024-06-21 20:18:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:55,511 INFO 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 20:18:55,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:55,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816006289] [2024-06-21 20:18:55,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816006289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:55,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:55,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:18:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080529919] [2024-06-21 20:18:55,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:55,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:18:55,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:18:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:18:55,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:18:55,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 234 transitions, 2453 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:55,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:55,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:18:55,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:56,614 INFO L124 PetriNetUnfolderBase]: 3373/5028 cut-off events. [2024-06-21 20:18:56,614 INFO L125 PetriNetUnfolderBase]: For 347654/347670 co-relation queries the response was YES. [2024-06-21 20:18:56,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39342 conditions, 5028 events. 3373/5028 cut-off events. For 347654/347670 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25230 event pairs, 1086 based on Foata normal form. 10/5022 useless extension candidates. Maximal degree in co-relation 39256. Up to 4786 conditions per place. [2024-06-21 20:18:56,657 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 208 selfloop transitions, 23 changer transitions 0/258 dead transitions. [2024-06-21 20:18:56,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 258 transitions, 3149 flow [2024-06-21 20:18:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:18:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:18:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 20:18:56,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35917312661498707 [2024-06-21 20:18:56,658 INFO L175 Difference]: Start difference. First operand has 180 places, 234 transitions, 2453 flow. Second operand 9 states and 139 transitions. [2024-06-21 20:18:56,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 258 transitions, 3149 flow [2024-06-21 20:18:56,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 258 transitions, 3025 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:56,935 INFO L231 Difference]: Finished difference. Result has 186 places, 241 transitions, 2485 flow [2024-06-21 20:18:56,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2485, PETRI_PLACES=186, PETRI_TRANSITIONS=241} [2024-06-21 20:18:56,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-21 20:18:56,936 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 241 transitions, 2485 flow [2024-06-21 20:18:56,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:56,936 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 20:18:56,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:18:56,936 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 20:18:56,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:56,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1369564912, now seen corresponding path program 3 times [2024-06-21 20:18:56,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:56,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041539373] [2024-06-21 20:18:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:56,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:57,684 INFO 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 20:18:57,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041539373] [2024-06-21 20:18:57,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041539373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:57,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:57,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:18:57,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805932020] [2024-06-21 20:18:57,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:57,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:18:57,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:57,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:18:57,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:18:57,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:18:57,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 241 transitions, 2485 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:57,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:57,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:18:57,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:58,731 INFO L124 PetriNetUnfolderBase]: 3364/5017 cut-off events. [2024-06-21 20:18:58,731 INFO L125 PetriNetUnfolderBase]: For 351050/351067 co-relation queries the response was YES. [2024-06-21 20:18:58,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39514 conditions, 5017 events. 3364/5017 cut-off events. For 351050/351067 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25141 event pairs, 933 based on Foata normal form. 8/5006 useless extension candidates. Maximal degree in co-relation 39427. Up to 4571 conditions per place. [2024-06-21 20:18:58,773 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 178 selfloop transitions, 60 changer transitions 0/265 dead transitions. [2024-06-21 20:18:58,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 265 transitions, 3211 flow [2024-06-21 20:18:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 20:18:58,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-21 20:18:58,774 INFO L175 Difference]: Start difference. First operand has 186 places, 241 transitions, 2485 flow. Second operand 7 states and 125 transitions. [2024-06-21 20:18:58,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 265 transitions, 3211 flow [2024-06-21 20:18:59,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 265 transitions, 3141 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:59,063 INFO L231 Difference]: Finished difference. Result has 189 places, 247 transitions, 2692 flow [2024-06-21 20:18:59,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2692, PETRI_PLACES=189, PETRI_TRANSITIONS=247} [2024-06-21 20:18:59,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-21 20:18:59,064 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 247 transitions, 2692 flow [2024-06-21 20:18:59,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:59,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:59,064 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 20:18:59,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:18:59,064 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 20:18:59,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1184016954, now seen corresponding path program 1 times [2024-06-21 20:18:59,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:59,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966190173] [2024-06-21 20:18:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:59,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:59,829 INFO 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 20:18:59,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:59,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966190173] [2024-06-21 20:18:59,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966190173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:59,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:59,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:18:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988033407] [2024-06-21 20:18:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:18:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:18:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:18:59,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:18:59,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 247 transitions, 2692 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:18:59,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:59,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:18:59,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:00,946 INFO L124 PetriNetUnfolderBase]: 3582/5268 cut-off events. [2024-06-21 20:19:00,946 INFO L125 PetriNetUnfolderBase]: For 367147/367152 co-relation queries the response was YES. [2024-06-21 20:19:00,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42216 conditions, 5268 events. 3582/5268 cut-off events. For 367147/367152 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25765 event pairs, 1083 based on Foata normal form. 8/5273 useless extension candidates. Maximal degree in co-relation 42126. Up to 4930 conditions per place. [2024-06-21 20:19:00,989 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 225 selfloop transitions, 46 changer transitions 0/274 dead transitions. [2024-06-21 20:19:00,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 274 transitions, 3498 flow [2024-06-21 20:19:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:19:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:19:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 20:19:00,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-21 20:19:00,991 INFO L175 Difference]: Start difference. First operand has 189 places, 247 transitions, 2692 flow. Second operand 8 states and 131 transitions. [2024-06-21 20:19:00,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 274 transitions, 3498 flow [2024-06-21 20:19:01,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 274 transitions, 3418 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 20:19:01,288 INFO L231 Difference]: Finished difference. Result has 194 places, 251 transitions, 2794 flow [2024-06-21 20:19:01,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2794, PETRI_PLACES=194, PETRI_TRANSITIONS=251} [2024-06-21 20:19:01,289 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-21 20:19:01,289 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 251 transitions, 2794 flow [2024-06-21 20:19:01,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:01,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:01,289 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 20:19:01,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:19:01,290 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 20:19:01,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1369052978, now seen corresponding path program 2 times [2024-06-21 20:19:01,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:01,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493915772] [2024-06-21 20:19:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:02,061 INFO 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 20:19:02,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:02,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493915772] [2024-06-21 20:19:02,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493915772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:02,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:02,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:19:02,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343229039] [2024-06-21 20:19:02,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:02,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:19:02,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:19:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:19:02,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:02,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 251 transitions, 2794 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:02,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:02,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:02,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:03,207 INFO L124 PetriNetUnfolderBase]: 3613/5309 cut-off events. [2024-06-21 20:19:03,207 INFO L125 PetriNetUnfolderBase]: For 381977/381979 co-relation queries the response was YES. [2024-06-21 20:19:03,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43567 conditions, 5309 events. 3613/5309 cut-off events. For 381977/381979 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26009 event pairs, 1106 based on Foata normal form. 4/5311 useless extension candidates. Maximal degree in co-relation 43475. Up to 5175 conditions per place. [2024-06-21 20:19:03,252 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 235 selfloop transitions, 45 changer transitions 0/283 dead transitions. [2024-06-21 20:19:03,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 283 transitions, 3868 flow [2024-06-21 20:19:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:19:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:19:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:19:03,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:19:03,253 INFO L175 Difference]: Start difference. First operand has 194 places, 251 transitions, 2794 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:19:03,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 283 transitions, 3868 flow [2024-06-21 20:19:03,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 283 transitions, 3661 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 20:19:03,573 INFO L231 Difference]: Finished difference. Result has 197 places, 261 transitions, 2919 flow [2024-06-21 20:19:03,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2919, PETRI_PLACES=197, PETRI_TRANSITIONS=261} [2024-06-21 20:19:03,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-21 20:19:03,574 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 261 transitions, 2919 flow [2024-06-21 20:19:03,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:03,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:03,574 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 20:19:03,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:19:03,574 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 20:19:03,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash 462258272, now seen corresponding path program 3 times [2024-06-21 20:19:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310839317] [2024-06-21 20:19:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:04,271 INFO 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 20:19:04,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:04,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310839317] [2024-06-21 20:19:04,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310839317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:04,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:04,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:19:04,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313977256] [2024-06-21 20:19:04,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:04,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:19:04,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:04,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:19:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:19:04,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:04,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 261 transitions, 2919 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:04,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:04,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:04,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:05,462 INFO L124 PetriNetUnfolderBase]: 3757/5513 cut-off events. [2024-06-21 20:19:05,463 INFO L125 PetriNetUnfolderBase]: For 424291/424298 co-relation queries the response was YES. [2024-06-21 20:19:05,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46117 conditions, 5513 events. 3757/5513 cut-off events. For 424291/424298 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 27238 event pairs, 1119 based on Foata normal form. 8/5518 useless extension candidates. Maximal degree in co-relation 46023. Up to 4849 conditions per place. [2024-06-21 20:19:05,515 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 212 selfloop transitions, 103 changer transitions 0/318 dead transitions. [2024-06-21 20:19:05,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 318 transitions, 4489 flow [2024-06-21 20:19:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:19:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:19:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 20:19:05,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 20:19:05,518 INFO L175 Difference]: Start difference. First operand has 197 places, 261 transitions, 2919 flow. Second operand 8 states and 136 transitions. [2024-06-21 20:19:05,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 318 transitions, 4489 flow [2024-06-21 20:19:05,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 318 transitions, 4361 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:05,909 INFO L231 Difference]: Finished difference. Result has 204 places, 294 transitions, 3682 flow [2024-06-21 20:19:05,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3682, PETRI_PLACES=204, PETRI_TRANSITIONS=294} [2024-06-21 20:19:05,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-21 20:19:05,910 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 294 transitions, 3682 flow [2024-06-21 20:19:05,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:05,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:05,911 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 20:19:05,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:19:05,911 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 20:19:05,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1377623858, now seen corresponding path program 4 times [2024-06-21 20:19:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:05,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571049853] [2024-06-21 20:19:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:05,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:07,027 INFO 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 20:19:07,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:07,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571049853] [2024-06-21 20:19:07,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571049853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:07,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:07,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:19:07,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535591482] [2024-06-21 20:19:07,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:07,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:19:07,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:19:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:19:07,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:07,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 294 transitions, 3682 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:07,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:07,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:07,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:08,336 INFO L124 PetriNetUnfolderBase]: 3793/5559 cut-off events. [2024-06-21 20:19:08,336 INFO L125 PetriNetUnfolderBase]: For 445264/445266 co-relation queries the response was YES. [2024-06-21 20:19:08,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48217 conditions, 5559 events. 3793/5559 cut-off events. For 445264/445266 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27369 event pairs, 1126 based on Foata normal form. 6/5563 useless extension candidates. Maximal degree in co-relation 48118. Up to 5456 conditions per place. [2024-06-21 20:19:08,385 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 284 selfloop transitions, 36 changer transitions 0/323 dead transitions. [2024-06-21 20:19:08,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 323 transitions, 4680 flow [2024-06-21 20:19:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:19:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:19:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:19:08,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:19:08,387 INFO L175 Difference]: Start difference. First operand has 204 places, 294 transitions, 3682 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:19:08,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 323 transitions, 4680 flow [2024-06-21 20:19:08,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 323 transitions, 4539 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-21 20:19:08,802 INFO L231 Difference]: Finished difference. Result has 211 places, 301 transitions, 3792 flow [2024-06-21 20:19:08,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3792, PETRI_PLACES=211, PETRI_TRANSITIONS=301} [2024-06-21 20:19:08,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 20:19:08,803 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 301 transitions, 3792 flow [2024-06-21 20:19:08,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:08,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:08,803 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 20:19:08,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:19:08,804 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 20:19:08,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1369042066, now seen corresponding path program 1 times [2024-06-21 20:19:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:08,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453911252] [2024-06-21 20:19:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:08,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:09,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:09,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453911252] [2024-06-21 20:19:09,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453911252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:09,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:09,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:19:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543012831] [2024-06-21 20:19:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:09,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:19:09,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:19:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:19:09,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:19:09,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 301 transitions, 3792 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:09,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:09,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:19:09,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:10,851 INFO L124 PetriNetUnfolderBase]: 3685/5469 cut-off events. [2024-06-21 20:19:10,851 INFO L125 PetriNetUnfolderBase]: For 481773/481800 co-relation queries the response was YES. [2024-06-21 20:19:10,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48081 conditions, 5469 events. 3685/5469 cut-off events. For 481773/481800 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27502 event pairs, 986 based on Foata normal form. 30/5476 useless extension candidates. Maximal degree in co-relation 47979. Up to 4974 conditions per place. [2024-06-21 20:19:10,913 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 235 selfloop transitions, 62 changer transitions 0/334 dead transitions. [2024-06-21 20:19:10,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 334 transitions, 4619 flow [2024-06-21 20:19:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 20:19:10,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-21 20:19:10,915 INFO L175 Difference]: Start difference. First operand has 211 places, 301 transitions, 3792 flow. Second operand 9 states and 154 transitions. [2024-06-21 20:19:10,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 334 transitions, 4619 flow [2024-06-21 20:19:11,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 334 transitions, 4465 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:11,425 INFO L231 Difference]: Finished difference. Result has 216 places, 306 transitions, 3902 flow [2024-06-21 20:19:11,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3902, PETRI_PLACES=216, PETRI_TRANSITIONS=306} [2024-06-21 20:19:11,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-21 20:19:11,426 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 306 transitions, 3902 flow [2024-06-21 20:19:11,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:11,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:11,426 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 20:19:11,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:19:11,426 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:11,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash 600915519, now seen corresponding path program 1 times [2024-06-21 20:19:11,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:11,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811300730] [2024-06-21 20:19:11,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:11,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:12,677 INFO 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 20:19:12,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:12,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811300730] [2024-06-21 20:19:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811300730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:12,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:12,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:19:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936626423] [2024-06-21 20:19:12,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:12,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:19:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:19:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:19:12,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:12,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 306 transitions, 3902 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:12,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:12,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:12,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:14,285 INFO L124 PetriNetUnfolderBase]: 4308/6371 cut-off events. [2024-06-21 20:19:14,286 INFO L125 PetriNetUnfolderBase]: For 533296/533298 co-relation queries the response was YES. [2024-06-21 20:19:14,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54983 conditions, 6371 events. 4308/6371 cut-off events. For 533296/533298 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 32485 event pairs, 1057 based on Foata normal form. 18/6387 useless extension candidates. Maximal degree in co-relation 54879. Up to 5725 conditions per place. [2024-06-21 20:19:14,355 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 354 selfloop transitions, 37 changer transitions 0/394 dead transitions. [2024-06-21 20:19:14,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 394 transitions, 5390 flow [2024-06-21 20:19:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:19:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:19:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-21 20:19:14,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2024-06-21 20:19:14,357 INFO L175 Difference]: Start difference. First operand has 216 places, 306 transitions, 3902 flow. Second operand 11 states and 197 transitions. [2024-06-21 20:19:14,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 394 transitions, 5390 flow [2024-06-21 20:19:14,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 394 transitions, 5201 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:19:14,889 INFO L231 Difference]: Finished difference. Result has 226 places, 331 transitions, 4161 flow [2024-06-21 20:19:14,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4161, PETRI_PLACES=226, PETRI_TRANSITIONS=331} [2024-06-21 20:19:14,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-21 20:19:14,889 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 331 transitions, 4161 flow [2024-06-21 20:19:14,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:14,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:14,890 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 20:19:14,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:19:14,890 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:14,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:14,890 INFO L85 PathProgramCache]: Analyzing trace with hash -423996273, now seen corresponding path program 2 times [2024-06-21 20:19:14,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:14,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236952316] [2024-06-21 20:19:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:14,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:16,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:16,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236952316] [2024-06-21 20:19:16,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236952316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:16,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:16,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:19:16,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324905049] [2024-06-21 20:19:16,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:16,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:19:16,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:19:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:19:16,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:16,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 331 transitions, 4161 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:16,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:16,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:16,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:18,138 INFO L124 PetriNetUnfolderBase]: 4502/6689 cut-off events. [2024-06-21 20:19:18,139 INFO L125 PetriNetUnfolderBase]: For 592566/592570 co-relation queries the response was YES. [2024-06-21 20:19:18,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58605 conditions, 6689 events. 4502/6689 cut-off events. For 592566/592570 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35107 event pairs, 1019 based on Foata normal form. 20/6707 useless extension candidates. Maximal degree in co-relation 58495. Up to 5507 conditions per place. [2024-06-21 20:19:18,216 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 338 selfloop transitions, 48 changer transitions 0/389 dead transitions. [2024-06-21 20:19:18,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 389 transitions, 5411 flow [2024-06-21 20:19:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:19:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:19:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 20:19:18,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-21 20:19:18,218 INFO L175 Difference]: Start difference. First operand has 226 places, 331 transitions, 4161 flow. Second operand 10 states and 178 transitions. [2024-06-21 20:19:18,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 389 transitions, 5411 flow [2024-06-21 20:19:18,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 389 transitions, 5375 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 20:19:18,719 INFO L231 Difference]: Finished difference. Result has 234 places, 333 transitions, 4311 flow [2024-06-21 20:19:18,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4311, PETRI_PLACES=234, PETRI_TRANSITIONS=333} [2024-06-21 20:19:18,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 20:19:18,720 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 333 transitions, 4311 flow [2024-06-21 20:19:18,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:18,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:18,721 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 20:19:18,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:19:18,721 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:18,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash -543564333, now seen corresponding path program 3 times [2024-06-21 20:19:18,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:18,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096659770] [2024-06-21 20:19:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:18,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:20,357 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 20:19:20,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:20,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096659770] [2024-06-21 20:19:20,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096659770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:20,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:20,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:19:20,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333519676] [2024-06-21 20:19:20,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:20,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:19:20,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:19:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:19:20,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:20,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 333 transitions, 4311 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:20,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:20,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:20,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:22,380 INFO L124 PetriNetUnfolderBase]: 5064/7566 cut-off events. [2024-06-21 20:19:22,381 INFO L125 PetriNetUnfolderBase]: For 686794/686794 co-relation queries the response was YES. [2024-06-21 20:19:22,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66500 conditions, 7566 events. 5064/7566 cut-off events. For 686794/686794 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 41092 event pairs, 1291 based on Foata normal form. 24/7583 useless extension candidates. Maximal degree in co-relation 66388. Up to 6721 conditions per place. [2024-06-21 20:19:22,473 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 357 selfloop transitions, 54 changer transitions 0/414 dead transitions. [2024-06-21 20:19:22,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 414 transitions, 6066 flow [2024-06-21 20:19:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:19:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:19:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 20:19:22,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-21 20:19:22,485 INFO L175 Difference]: Start difference. First operand has 234 places, 333 transitions, 4311 flow. Second operand 10 states and 174 transitions. [2024-06-21 20:19:22,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 414 transitions, 6066 flow [2024-06-21 20:19:23,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 414 transitions, 5944 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 20:19:23,258 INFO L231 Difference]: Finished difference. Result has 242 places, 365 transitions, 4951 flow [2024-06-21 20:19:23,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4951, PETRI_PLACES=242, PETRI_TRANSITIONS=365} [2024-06-21 20:19:23,258 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-21 20:19:23,258 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 365 transitions, 4951 flow [2024-06-21 20:19:23,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:23,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:23,259 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 20:19:23,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:19:23,259 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 20:19:23,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:23,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1171011766, now seen corresponding path program 1 times [2024-06-21 20:19:23,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:23,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535369659] [2024-06-21 20:19:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:23,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:23,903 INFO 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 20:19:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:23,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535369659] [2024-06-21 20:19:23,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535369659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:23,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:23,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:19:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650695459] [2024-06-21 20:19:23,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:23,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:19:23,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:23,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:19:23,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:19:23,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:23,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 365 transitions, 4951 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:23,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:23,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:23,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:25,534 INFO L124 PetriNetUnfolderBase]: 5085/7600 cut-off events. [2024-06-21 20:19:25,535 INFO L125 PetriNetUnfolderBase]: For 649588/649594 co-relation queries the response was YES. [2024-06-21 20:19:25,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67262 conditions, 7600 events. 5085/7600 cut-off events. For 649588/649594 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 41222 event pairs, 1635 based on Foata normal form. 6/7604 useless extension candidates. Maximal degree in co-relation 67144. Up to 7359 conditions per place. [2024-06-21 20:19:25,623 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 344 selfloop transitions, 50 changer transitions 0/397 dead transitions. [2024-06-21 20:19:25,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 397 transitions, 6001 flow [2024-06-21 20:19:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 20:19:25,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-21 20:19:25,624 INFO L175 Difference]: Start difference. First operand has 242 places, 365 transitions, 4951 flow. Second operand 7 states and 121 transitions. [2024-06-21 20:19:25,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 397 transitions, 6001 flow [2024-06-21 20:19:26,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 397 transitions, 5947 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-21 20:19:26,525 INFO L231 Difference]: Finished difference. Result has 250 places, 375 transitions, 5231 flow [2024-06-21 20:19:26,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4897, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5231, PETRI_PLACES=250, PETRI_TRANSITIONS=375} [2024-06-21 20:19:26,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-21 20:19:26,526 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 375 transitions, 5231 flow [2024-06-21 20:19:26,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:26,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:26,526 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 20:19:26,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:19:26,527 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 20:19:26,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash -980862660, now seen corresponding path program 2 times [2024-06-21 20:19:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:26,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174824005] [2024-06-21 20:19:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:26,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:27,272 INFO 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 20:19:27,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174824005] [2024-06-21 20:19:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174824005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:27,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:27,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:19:27,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727615173] [2024-06-21 20:19:27,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:27,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:19:27,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:27,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:19:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:19:27,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:27,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 375 transitions, 5231 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:27,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:27,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:27,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:28,900 INFO L124 PetriNetUnfolderBase]: 5087/7603 cut-off events. [2024-06-21 20:19:28,900 INFO L125 PetriNetUnfolderBase]: For 668931/668937 co-relation queries the response was YES. [2024-06-21 20:19:28,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68268 conditions, 7603 events. 5087/7603 cut-off events. For 668931/668937 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 41209 event pairs, 1622 based on Foata normal form. 6/7607 useless extension candidates. Maximal degree in co-relation 68145. Up to 7296 conditions per place. [2024-06-21 20:19:28,987 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 336 selfloop transitions, 62 changer transitions 0/401 dead transitions. [2024-06-21 20:19:28,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 401 transitions, 6348 flow [2024-06-21 20:19:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 20:19:28,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-21 20:19:28,989 INFO L175 Difference]: Start difference. First operand has 250 places, 375 transitions, 5231 flow. Second operand 7 states and 121 transitions. [2024-06-21 20:19:28,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 401 transitions, 6348 flow [2024-06-21 20:19:29,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 401 transitions, 6261 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 20:19:29,673 INFO L231 Difference]: Finished difference. Result has 256 places, 379 transitions, 5421 flow [2024-06-21 20:19:29,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5421, PETRI_PLACES=256, PETRI_TRANSITIONS=379} [2024-06-21 20:19:29,674 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-21 20:19:29,674 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 379 transitions, 5421 flow [2024-06-21 20:19:29,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:29,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:29,674 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 20:19:29,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:19:29,675 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:29,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:29,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2084127559, now seen corresponding path program 4 times [2024-06-21 20:19:29,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:29,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62606609] [2024-06-21 20:19:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:29,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:31,131 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 20:19:31,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:31,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62606609] [2024-06-21 20:19:31,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62606609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:31,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:31,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:19:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705005303] [2024-06-21 20:19:31,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:31,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:19:31,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:19:31,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:19:31,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:31,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 379 transitions, 5421 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:31,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:31,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:31,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:33,007 INFO L124 PetriNetUnfolderBase]: 5099/7642 cut-off events. [2024-06-21 20:19:33,007 INFO L125 PetriNetUnfolderBase]: For 707131/707135 co-relation queries the response was YES. [2024-06-21 20:19:33,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66055 conditions, 7642 events. 5099/7642 cut-off events. For 707131/707135 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41584 event pairs, 1182 based on Foata normal form. 88/7728 useless extension candidates. Maximal degree in co-relation 65929. Up to 6614 conditions per place. [2024-06-21 20:19:33,111 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 63 changer transitions 0/424 dead transitions. [2024-06-21 20:19:33,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 424 transitions, 6524 flow [2024-06-21 20:19:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:19:33,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-21 20:19:33,114 INFO L175 Difference]: Start difference. First operand has 256 places, 379 transitions, 5421 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:19:33,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 424 transitions, 6524 flow [2024-06-21 20:19:33,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 424 transitions, 6352 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:33,985 INFO L231 Difference]: Finished difference. Result has 260 places, 381 transitions, 5480 flow [2024-06-21 20:19:33,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5249, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5480, PETRI_PLACES=260, PETRI_TRANSITIONS=381} [2024-06-21 20:19:33,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-21 20:19:33,986 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 381 transitions, 5480 flow [2024-06-21 20:19:33,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:33,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:33,986 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 20:19:33,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:19:33,986 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:33,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:33,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1451975505, now seen corresponding path program 1 times [2024-06-21 20:19:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:33,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758510222] [2024-06-21 20:19:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:33,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:35,521 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 20:19:35,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758510222] [2024-06-21 20:19:35,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758510222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:35,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:35,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:19:35,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760365932] [2024-06-21 20:19:35,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:35,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:19:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:19:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:19:35,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:35,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 381 transitions, 5480 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:35,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:35,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:35,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:37,346 INFO L124 PetriNetUnfolderBase]: 5191/7792 cut-off events. [2024-06-21 20:19:37,347 INFO L125 PetriNetUnfolderBase]: For 656743/656745 co-relation queries the response was YES. [2024-06-21 20:19:37,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67247 conditions, 7792 events. 5191/7792 cut-off events. For 656743/656745 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 42643 event pairs, 959 based on Foata normal form. 24/7814 useless extension candidates. Maximal degree in co-relation 67121. Up to 6514 conditions per place. [2024-06-21 20:19:37,441 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 331 selfloop transitions, 96 changer transitions 0/430 dead transitions. [2024-06-21 20:19:37,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 430 transitions, 6574 flow [2024-06-21 20:19:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:19:37,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 20:19:37,443 INFO L175 Difference]: Start difference. First operand has 260 places, 381 transitions, 5480 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:19:37,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 430 transitions, 6574 flow [2024-06-21 20:19:38,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 430 transitions, 6416 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 20:19:38,355 INFO L231 Difference]: Finished difference. Result has 262 places, 382 transitions, 5563 flow [2024-06-21 20:19:38,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5563, PETRI_PLACES=262, PETRI_TRANSITIONS=382} [2024-06-21 20:19:38,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-21 20:19:38,356 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 382 transitions, 5563 flow [2024-06-21 20:19:38,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:38,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:38,357 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 20:19:38,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:19:38,357 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:38,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:38,357 INFO L85 PathProgramCache]: Analyzing trace with hash 880336125, now seen corresponding path program 5 times [2024-06-21 20:19:38,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:38,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848640755] [2024-06-21 20:19:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:38,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:39,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848640755] [2024-06-21 20:19:39,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848640755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:39,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:39,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:19:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083930672] [2024-06-21 20:19:39,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:39,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:19:39,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:39,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:19:39,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:19:39,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:39,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 382 transitions, 5563 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 20:19:39,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:39,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:39,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:41,849 INFO L124 PetriNetUnfolderBase]: 5385/8110 cut-off events. [2024-06-21 20:19:41,850 INFO L125 PetriNetUnfolderBase]: For 698003/698005 co-relation queries the response was YES. [2024-06-21 20:19:41,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70567 conditions, 8110 events. 5385/8110 cut-off events. For 698003/698005 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 45072 event pairs, 994 based on Foata normal form. 16/8124 useless extension candidates. Maximal degree in co-relation 70440. Up to 6490 conditions per place. [2024-06-21 20:19:41,952 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 335 selfloop transitions, 99 changer transitions 0/437 dead transitions. [2024-06-21 20:19:41,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 437 transitions, 6935 flow [2024-06-21 20:19:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:19:41,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 20:19:41,954 INFO L175 Difference]: Start difference. First operand has 262 places, 382 transitions, 5563 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:19:41,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 437 transitions, 6935 flow [2024-06-21 20:19:43,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 437 transitions, 6722 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:19:43,143 INFO L231 Difference]: Finished difference. Result has 264 places, 384 transitions, 5640 flow [2024-06-21 20:19:43,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5640, PETRI_PLACES=264, PETRI_TRANSITIONS=384} [2024-06-21 20:19:43,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 20:19:43,145 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 384 transitions, 5640 flow [2024-06-21 20:19:43,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 20:19:43,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:43,146 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 20:19:43,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:19:43,146 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:43,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1446682621, now seen corresponding path program 6 times [2024-06-21 20:19:43,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:43,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639115484] [2024-06-21 20:19:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:43,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:44,801 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 20:19:44,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:44,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639115484] [2024-06-21 20:19:44,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639115484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:44,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:44,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:19:44,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296553555] [2024-06-21 20:19:44,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:44,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:19:44,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:19:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:19:44,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:44,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 384 transitions, 5640 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:44,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:44,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:44,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:46,913 INFO L124 PetriNetUnfolderBase]: 5341/8042 cut-off events. [2024-06-21 20:19:46,914 INFO L125 PetriNetUnfolderBase]: For 697527/697529 co-relation queries the response was YES. [2024-06-21 20:19:46,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69204 conditions, 8042 events. 5341/8042 cut-off events. For 697527/697529 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44597 event pairs, 989 based on Foata normal form. 24/8064 useless extension candidates. Maximal degree in co-relation 69076. Up to 6764 conditions per place. [2024-06-21 20:19:47,002 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 96 changer transitions 0/431 dead transitions. [2024-06-21 20:19:47,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 431 transitions, 6688 flow [2024-06-21 20:19:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:19:47,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:19:47,004 INFO L175 Difference]: Start difference. First operand has 264 places, 384 transitions, 5640 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:19:47,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 431 transitions, 6688 flow [2024-06-21 20:19:47,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 431 transitions, 6520 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:48,002 INFO L231 Difference]: Finished difference. Result has 268 places, 384 transitions, 5671 flow [2024-06-21 20:19:48,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5472, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5671, PETRI_PLACES=268, PETRI_TRANSITIONS=384} [2024-06-21 20:19:48,003 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-21 20:19:48,003 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 384 transitions, 5671 flow [2024-06-21 20:19:48,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:48,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:48,003 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 20:19:48,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:19:48,004 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:48,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:48,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1053249599, now seen corresponding path program 2 times [2024-06-21 20:19:48,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:48,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828046094] [2024-06-21 20:19:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:48,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:49,331 INFO 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 20:19:49,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:49,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828046094] [2024-06-21 20:19:49,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828046094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:49,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:49,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:19:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331905449] [2024-06-21 20:19:49,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:19:49,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:49,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:19:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:19:49,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:49,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 384 transitions, 5671 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:49,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:49,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:49,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:51,325 INFO L124 PetriNetUnfolderBase]: 5399/8140 cut-off events. [2024-06-21 20:19:51,325 INFO L125 PetriNetUnfolderBase]: For 707984/707986 co-relation queries the response was YES. [2024-06-21 20:19:51,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70279 conditions, 8140 events. 5399/8140 cut-off events. For 707984/707986 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 45429 event pairs, 940 based on Foata normal form. 16/8154 useless extension candidates. Maximal degree in co-relation 70149. Up to 6048 conditions per place. [2024-06-21 20:19:51,428 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 329 selfloop transitions, 103 changer transitions 0/435 dead transitions. [2024-06-21 20:19:51,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 435 transitions, 6801 flow [2024-06-21 20:19:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:19:51,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 20:19:51,429 INFO L175 Difference]: Start difference. First operand has 268 places, 384 transitions, 5671 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:19:51,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 435 transitions, 6801 flow [2024-06-21 20:19:52,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 435 transitions, 6599 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:19:52,449 INFO L231 Difference]: Finished difference. Result has 269 places, 385 transitions, 5727 flow [2024-06-21 20:19:52,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5469, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5727, PETRI_PLACES=269, PETRI_TRANSITIONS=385} [2024-06-21 20:19:52,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-21 20:19:52,450 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 385 transitions, 5727 flow [2024-06-21 20:19:52,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:52,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:52,451 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 20:19:52,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:19:52,451 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 20:19:52,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1998920003, now seen corresponding path program 1 times [2024-06-21 20:19:52,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:52,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810844233] [2024-06-21 20:19:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:52,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:53,318 INFO 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 20:19:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:53,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810844233] [2024-06-21 20:19:53,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810844233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:53,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:53,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:19:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282709037] [2024-06-21 20:19:53,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:53,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:19:53,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:19:53,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:19:53,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:53,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 385 transitions, 5727 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:53,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:53,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:53,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:55,112 INFO L124 PetriNetUnfolderBase]: 5409/8155 cut-off events. [2024-06-21 20:19:55,112 INFO L125 PetriNetUnfolderBase]: For 712760/712766 co-relation queries the response was YES. [2024-06-21 20:19:55,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70915 conditions, 8155 events. 5409/8155 cut-off events. For 712760/712766 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 45724 event pairs, 1724 based on Foata normal form. 6/8159 useless extension candidates. Maximal degree in co-relation 70784. Up to 7908 conditions per place. [2024-06-21 20:19:55,209 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 359 selfloop transitions, 49 changer transitions 0/411 dead transitions. [2024-06-21 20:19:55,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 411 transitions, 6723 flow [2024-06-21 20:19:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:19:55,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 20:19:55,211 INFO L175 Difference]: Start difference. First operand has 269 places, 385 transitions, 5727 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:19:55,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 411 transitions, 6723 flow [2024-06-21 20:19:56,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 411 transitions, 6487 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:19:56,316 INFO L231 Difference]: Finished difference. Result has 269 places, 388 transitions, 5693 flow [2024-06-21 20:19:56,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5693, PETRI_PLACES=269, PETRI_TRANSITIONS=388} [2024-06-21 20:19:56,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-21 20:19:56,316 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 388 transitions, 5693 flow [2024-06-21 20:19:56,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:56,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:56,317 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 20:19:56,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:19:56,317 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 20:19:56,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2089243906, now seen corresponding path program 1 times [2024-06-21 20:19:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:56,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662420422] [2024-06-21 20:19:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:56,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:57,022 INFO 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 20:19:57,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:57,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662420422] [2024-06-21 20:19:57,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662420422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:57,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:57,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:19:57,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299863163] [2024-06-21 20:19:57,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:57,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:19:57,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:57,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:19:57,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:19:57,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:19:57,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 388 transitions, 5693 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:57,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:57,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:19:57,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:58,744 INFO L124 PetriNetUnfolderBase]: 5397/8144 cut-off events. [2024-06-21 20:19:58,745 INFO L125 PetriNetUnfolderBase]: For 724608/724619 co-relation queries the response was YES. [2024-06-21 20:19:58,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70052 conditions, 8144 events. 5397/8144 cut-off events. For 724608/724619 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 45667 event pairs, 1740 based on Foata normal form. 10/8149 useless extension candidates. Maximal degree in co-relation 69920. Up to 7693 conditions per place. [2024-06-21 20:19:58,841 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 84 changer transitions 0/407 dead transitions. [2024-06-21 20:19:58,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 407 transitions, 6731 flow [2024-06-21 20:19:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 20:19:58,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-21 20:19:58,842 INFO L175 Difference]: Start difference. First operand has 269 places, 388 transitions, 5693 flow. Second operand 7 states and 117 transitions. [2024-06-21 20:19:58,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 407 transitions, 6731 flow [2024-06-21 20:19:59,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 407 transitions, 6617 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:59,973 INFO L231 Difference]: Finished difference. Result has 271 places, 388 transitions, 5760 flow [2024-06-21 20:19:59,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5579, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5760, PETRI_PLACES=271, PETRI_TRANSITIONS=388} [2024-06-21 20:19:59,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-21 20:19:59,973 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 388 transitions, 5760 flow [2024-06-21 20:19:59,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:19:59,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:59,974 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 20:19:59,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:19:59,974 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 20:19:59,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1951459340, now seen corresponding path program 2 times [2024-06-21 20:19:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:59,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349927859] [2024-06-21 20:19:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:00,608 INFO 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 20:20:00,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:00,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349927859] [2024-06-21 20:20:00,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349927859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:00,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:00,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:00,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804078368] [2024-06-21 20:20:00,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:00,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:00,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:00,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 388 transitions, 5760 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:00,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:00,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:00,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:02,310 INFO L124 PetriNetUnfolderBase]: 5377/8116 cut-off events. [2024-06-21 20:20:02,310 INFO L125 PetriNetUnfolderBase]: For 732568/732579 co-relation queries the response was YES. [2024-06-21 20:20:02,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70067 conditions, 8116 events. 5377/8116 cut-off events. For 732568/732579 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 45394 event pairs, 1736 based on Foata normal form. 10/8121 useless extension candidates. Maximal degree in co-relation 69934. Up to 7546 conditions per place. [2024-06-21 20:20:02,406 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 301 selfloop transitions, 103 changer transitions 0/407 dead transitions. [2024-06-21 20:20:02,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 407 transitions, 6800 flow [2024-06-21 20:20:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 20:20:02,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-21 20:20:02,407 INFO L175 Difference]: Start difference. First operand has 271 places, 388 transitions, 5760 flow. Second operand 7 states and 118 transitions. [2024-06-21 20:20:02,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 407 transitions, 6800 flow [2024-06-21 20:20:03,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 407 transitions, 6571 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:03,530 INFO L231 Difference]: Finished difference. Result has 273 places, 388 transitions, 5749 flow [2024-06-21 20:20:03,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5749, PETRI_PLACES=273, PETRI_TRANSITIONS=388} [2024-06-21 20:20:03,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-21 20:20:03,531 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 388 transitions, 5749 flow [2024-06-21 20:20:03,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:03,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:03,532 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 20:20:03,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:20:03,532 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 20:20:03,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash -990117661, now seen corresponding path program 2 times [2024-06-21 20:20:03,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:03,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437427737] [2024-06-21 20:20:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:03,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:04,216 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 20:20:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:04,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437427737] [2024-06-21 20:20:04,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437427737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:04,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:04,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:20:04,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158307042] [2024-06-21 20:20:04,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:04,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:20:04,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:20:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:20:04,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:04,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 388 transitions, 5749 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:20:04,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:04,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:04,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:06,099 INFO L124 PetriNetUnfolderBase]: 5375/8110 cut-off events. [2024-06-21 20:20:06,099 INFO L125 PetriNetUnfolderBase]: For 749267/749276 co-relation queries the response was YES. [2024-06-21 20:20:06,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70289 conditions, 8110 events. 5375/8110 cut-off events. For 749267/749276 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 45391 event pairs, 1703 based on Foata normal form. 8/8113 useless extension candidates. Maximal degree in co-relation 70156. Up to 7867 conditions per place. [2024-06-21 20:20:06,202 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 362 selfloop transitions, 49 changer transitions 0/414 dead transitions. [2024-06-21 20:20:06,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 414 transitions, 6798 flow [2024-06-21 20:20:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 20:20:06,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-21 20:20:06,204 INFO L175 Difference]: Start difference. First operand has 273 places, 388 transitions, 5749 flow. Second operand 7 states and 116 transitions. [2024-06-21 20:20:06,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 414 transitions, 6798 flow [2024-06-21 20:20:07,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 414 transitions, 6622 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:20:07,290 INFO L231 Difference]: Finished difference. Result has 277 places, 394 transitions, 5840 flow [2024-06-21 20:20:07,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5840, PETRI_PLACES=277, PETRI_TRANSITIONS=394} [2024-06-21 20:20:07,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-21 20:20:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 394 transitions, 5840 flow [2024-06-21 20:20:07,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:20:07,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:07,292 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 20:20:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:20:07,292 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 20:20:07,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1536024598, now seen corresponding path program 3 times [2024-06-21 20:20:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:07,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952319257] [2024-06-21 20:20:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:07,957 INFO 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 20:20:07,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952319257] [2024-06-21 20:20:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952319257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:07,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:07,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:20:07,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860879890] [2024-06-21 20:20:07,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:07,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:20:07,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:20:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:20:08,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:08,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 394 transitions, 5840 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:20:08,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:08,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:08,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:09,785 INFO L124 PetriNetUnfolderBase]: 5365/8096 cut-off events. [2024-06-21 20:20:09,785 INFO L125 PetriNetUnfolderBase]: For 761219/761228 co-relation queries the response was YES. [2024-06-21 20:20:09,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70522 conditions, 8096 events. 5365/8096 cut-off events. For 761219/761228 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 45125 event pairs, 1703 based on Foata normal form. 8/8099 useless extension candidates. Maximal degree in co-relation 70387. Up to 7851 conditions per place. [2024-06-21 20:20:09,874 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 362 selfloop transitions, 49 changer transitions 0/414 dead transitions. [2024-06-21 20:20:09,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 414 transitions, 6750 flow [2024-06-21 20:20:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 20:20:09,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-21 20:20:09,875 INFO L175 Difference]: Start difference. First operand has 277 places, 394 transitions, 5840 flow. Second operand 7 states and 117 transitions. [2024-06-21 20:20:09,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 414 transitions, 6750 flow [2024-06-21 20:20:11,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 414 transitions, 6612 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 20:20:11,228 INFO L231 Difference]: Finished difference. Result has 280 places, 394 transitions, 5810 flow [2024-06-21 20:20:11,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5702, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5810, PETRI_PLACES=280, PETRI_TRANSITIONS=394} [2024-06-21 20:20:11,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-21 20:20:11,229 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 394 transitions, 5810 flow [2024-06-21 20:20:11,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 20:20:11,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:11,230 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 20:20:11,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:20:11,230 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:11,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash -448190363, now seen corresponding path program 7 times [2024-06-21 20:20:11,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:11,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640956320] [2024-06-21 20:20:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:11,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:12,709 INFO 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 20:20:12,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:12,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640956320] [2024-06-21 20:20:12,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640956320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:12,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:12,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:20:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330027557] [2024-06-21 20:20:12,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:12,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:20:12,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:20:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:20:12,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:12,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 394 transitions, 5810 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:12,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:12,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:12,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:14,885 INFO L124 PetriNetUnfolderBase]: 5509/8337 cut-off events. [2024-06-21 20:20:14,885 INFO L125 PetriNetUnfolderBase]: For 808151/808154 co-relation queries the response was YES. [2024-06-21 20:20:14,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72911 conditions, 8337 events. 5509/8337 cut-off events. For 808151/808154 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 46821 event pairs, 1041 based on Foata normal form. 16/8347 useless extension candidates. Maximal degree in co-relation 72776. Up to 6821 conditions per place. [2024-06-21 20:20:14,998 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 343 selfloop transitions, 99 changer transitions 0/445 dead transitions. [2024-06-21 20:20:14,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 445 transitions, 7210 flow [2024-06-21 20:20:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:20:15,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 20:20:15,000 INFO L175 Difference]: Start difference. First operand has 280 places, 394 transitions, 5810 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:20:15,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 445 transitions, 7210 flow [2024-06-21 20:20:16,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 445 transitions, 7089 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:16,284 INFO L231 Difference]: Finished difference. Result has 284 places, 396 transitions, 5987 flow [2024-06-21 20:20:16,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5987, PETRI_PLACES=284, PETRI_TRANSITIONS=396} [2024-06-21 20:20:16,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-21 20:20:16,284 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 396 transitions, 5987 flow [2024-06-21 20:20:16,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:16,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:16,285 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 20:20:16,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:20:16,289 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:16,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash -675553533, now seen corresponding path program 3 times [2024-06-21 20:20:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650944308] [2024-06-21 20:20:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:17,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:17,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650944308] [2024-06-21 20:20:17,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650944308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:17,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:17,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:20:17,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712992996] [2024-06-21 20:20:17,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:17,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:20:17,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:20:17,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:20:17,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:17,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 396 transitions, 5987 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:17,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:17,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:17,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:19,963 INFO L124 PetriNetUnfolderBase]: 5601/8489 cut-off events. [2024-06-21 20:20:19,963 INFO L125 PetriNetUnfolderBase]: For 850565/850568 co-relation queries the response was YES. [2024-06-21 20:20:20,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74865 conditions, 8489 events. 5601/8489 cut-off events. For 850565/850568 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 48042 event pairs, 1054 based on Foata normal form. 24/8507 useless extension candidates. Maximal degree in co-relation 74729. Up to 7207 conditions per place. [2024-06-21 20:20:20,098 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 342 selfloop transitions, 98 changer transitions 0/443 dead transitions. [2024-06-21 20:20:20,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 443 transitions, 7109 flow [2024-06-21 20:20:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:20:20,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-21 20:20:20,100 INFO L175 Difference]: Start difference. First operand has 284 places, 396 transitions, 5987 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:20:20,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 443 transitions, 7109 flow [2024-06-21 20:20:21,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 443 transitions, 6934 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:21,578 INFO L231 Difference]: Finished difference. Result has 288 places, 397 transitions, 6065 flow [2024-06-21 20:20:21,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6065, PETRI_PLACES=288, PETRI_TRANSITIONS=397} [2024-06-21 20:20:21,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 20:20:21,578 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 397 transitions, 6065 flow [2024-06-21 20:20:21,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:21,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:21,579 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 20:20:21,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:20:21,579 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:21,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -651155213, now seen corresponding path program 4 times [2024-06-21 20:20:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94600425] [2024-06-21 20:20:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:22,910 INFO 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 20:20:22,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94600425] [2024-06-21 20:20:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94600425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:22,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:22,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:20:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817737610] [2024-06-21 20:20:22,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:20:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:20:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:20:22,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:22,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 397 transitions, 6065 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:22,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:22,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:22,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:25,101 INFO L124 PetriNetUnfolderBase]: 5693/8641 cut-off events. [2024-06-21 20:20:25,101 INFO L125 PetriNetUnfolderBase]: For 850933/850936 co-relation queries the response was YES. [2024-06-21 20:20:25,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75956 conditions, 8641 events. 5693/8641 cut-off events. For 850933/850936 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 49278 event pairs, 1064 based on Foata normal form. 24/8659 useless extension candidates. Maximal degree in co-relation 75818. Up to 7359 conditions per place. [2024-06-21 20:20:25,202 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 342 selfloop transitions, 97 changer transitions 0/442 dead transitions. [2024-06-21 20:20:25,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 442 transitions, 7169 flow [2024-06-21 20:20:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:20:25,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 20:20:25,203 INFO L175 Difference]: Start difference. First operand has 288 places, 397 transitions, 6065 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:20:25,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 442 transitions, 7169 flow [2024-06-21 20:20:26,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 442 transitions, 6940 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:20:26,568 INFO L231 Difference]: Finished difference. Result has 289 places, 398 transitions, 6081 flow [2024-06-21 20:20:26,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5836, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6081, PETRI_PLACES=289, PETRI_TRANSITIONS=398} [2024-06-21 20:20:26,568 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-21 20:20:26,568 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 398 transitions, 6081 flow [2024-06-21 20:20:26,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:26,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:26,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:26,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:20:26,569 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:26,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -441510669, now seen corresponding path program 5 times [2024-06-21 20:20:26,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:26,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891044041] [2024-06-21 20:20:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:26,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:28,099 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 20:20:28,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:28,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891044041] [2024-06-21 20:20:28,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891044041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:28,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:28,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:20:28,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598746607] [2024-06-21 20:20:28,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:28,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:20:28,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:20:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:20:28,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:28,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 398 transitions, 6081 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:28,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:28,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:28,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:30,291 INFO L124 PetriNetUnfolderBase]: 5751/8739 cut-off events. [2024-06-21 20:20:30,291 INFO L125 PetriNetUnfolderBase]: For 863629/863632 co-relation queries the response was YES. [2024-06-21 20:20:30,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76782 conditions, 8739 events. 5751/8739 cut-off events. For 863629/863632 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 49975 event pairs, 1074 based on Foata normal form. 16/8749 useless extension candidates. Maximal degree in co-relation 76644. Up to 7171 conditions per place. [2024-06-21 20:20:30,406 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 101 changer transitions 0/448 dead transitions. [2024-06-21 20:20:30,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 448 transitions, 7245 flow [2024-06-21 20:20:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:20:30,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 20:20:30,407 INFO L175 Difference]: Start difference. First operand has 289 places, 398 transitions, 6081 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:20:30,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 448 transitions, 7245 flow [2024-06-21 20:20:31,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 448 transitions, 7030 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:20:31,923 INFO L231 Difference]: Finished difference. Result has 291 places, 399 transitions, 6124 flow [2024-06-21 20:20:31,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6124, PETRI_PLACES=291, PETRI_TRANSITIONS=399} [2024-06-21 20:20:31,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-21 20:20:31,924 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 399 transitions, 6124 flow [2024-06-21 20:20:31,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:31,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:31,925 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 20:20:31,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:20:31,925 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:31,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1460410637, now seen corresponding path program 6 times [2024-06-21 20:20:31,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:31,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86756958] [2024-06-21 20:20:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:31,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:33,392 INFO 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 20:20:33,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:33,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86756958] [2024-06-21 20:20:33,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86756958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:33,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:33,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:20:33,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554545728] [2024-06-21 20:20:33,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:33,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:20:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:20:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:20:33,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:33,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 399 transitions, 6124 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:33,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:33,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:33,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:35,530 INFO L124 PetriNetUnfolderBase]: 5809/8834 cut-off events. [2024-06-21 20:20:35,530 INFO L125 PetriNetUnfolderBase]: For 889851/889851 co-relation queries the response was YES. [2024-06-21 20:20:35,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77652 conditions, 8834 events. 5809/8834 cut-off events. For 889851/889851 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 50964 event pairs, 2010 based on Foata normal form. 16/8848 useless extension candidates. Maximal degree in co-relation 77513. Up to 8337 conditions per place. [2024-06-21 20:20:35,820 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 23 changer transitions 0/443 dead transitions. [2024-06-21 20:20:35,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 443 transitions, 7452 flow [2024-06-21 20:20:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:20:35,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-21 20:20:35,822 INFO L175 Difference]: Start difference. First operand has 291 places, 399 transitions, 6124 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:20:35,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 443 transitions, 7452 flow [2024-06-21 20:20:37,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 443 transitions, 7216 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 20:20:37,263 INFO L231 Difference]: Finished difference. Result has 293 places, 400 transitions, 5992 flow [2024-06-21 20:20:37,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5888, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5992, PETRI_PLACES=293, PETRI_TRANSITIONS=400} [2024-06-21 20:20:37,264 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-21 20:20:37,264 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 400 transitions, 5992 flow [2024-06-21 20:20:37,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:37,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:37,265 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 20:20:37,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:20:37,265 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:37,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:37,266 INFO L85 PathProgramCache]: Analyzing trace with hash -177170189, now seen corresponding path program 7 times [2024-06-21 20:20:37,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:37,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729060394] [2024-06-21 20:20:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:37,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:38,901 INFO 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 20:20:38,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:38,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729060394] [2024-06-21 20:20:38,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729060394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:38,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:38,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:20:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788096846] [2024-06-21 20:20:38,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:20:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:20:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:20:38,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:38,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 400 transitions, 5992 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:38,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:38,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:38,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:41,103 INFO L124 PetriNetUnfolderBase]: 5765/8766 cut-off events. [2024-06-21 20:20:41,103 INFO L125 PetriNetUnfolderBase]: For 882349/882349 co-relation queries the response was YES. [2024-06-21 20:20:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75441 conditions, 8766 events. 5765/8766 cut-off events. For 882349/882349 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 50561 event pairs, 2013 based on Foata normal form. 24/8788 useless extension candidates. Maximal degree in co-relation 75301. Up to 8463 conditions per place. [2024-06-21 20:20:41,211 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 413 selfloop transitions, 21 changer transitions 0/437 dead transitions. [2024-06-21 20:20:41,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 437 transitions, 7004 flow [2024-06-21 20:20:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 20:20:41,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-21 20:20:41,213 INFO L175 Difference]: Start difference. First operand has 293 places, 400 transitions, 5992 flow. Second operand 9 states and 150 transitions. [2024-06-21 20:20:41,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 437 transitions, 7004 flow [2024-06-21 20:20:42,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 437 transitions, 6908 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:42,656 INFO L231 Difference]: Finished difference. Result has 297 places, 400 transitions, 5945 flow [2024-06-21 20:20:42,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5945, PETRI_PLACES=297, PETRI_TRANSITIONS=400} [2024-06-21 20:20:42,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-21 20:20:42,657 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 400 transitions, 5945 flow [2024-06-21 20:20:42,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:42,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:42,657 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 20:20:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:20:42,658 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:42,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1802997527, now seen corresponding path program 8 times [2024-06-21 20:20:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616859558] [2024-06-21 20:20:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:42,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:44,076 INFO 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 20:20:44,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:44,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616859558] [2024-06-21 20:20:44,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616859558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:44,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:44,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:20:44,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524172307] [2024-06-21 20:20:44,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:20:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:20:44,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:20:44,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:44,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 400 transitions, 5945 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:44,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:44,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:44,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:46,222 INFO L124 PetriNetUnfolderBase]: 5737/8722 cut-off events. [2024-06-21 20:20:46,223 INFO L125 PetriNetUnfolderBase]: For 856917/856917 co-relation queries the response was YES. [2024-06-21 20:20:46,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73976 conditions, 8722 events. 5737/8722 cut-off events. For 856917/856917 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 50153 event pairs, 1940 based on Foata normal form. 16/8736 useless extension candidates. Maximal degree in co-relation 73835. Up to 8125 conditions per place. [2024-06-21 20:20:46,335 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 27 changer transitions 0/447 dead transitions. [2024-06-21 20:20:46,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 447 transitions, 7033 flow [2024-06-21 20:20:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:20:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:20:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 20:20:46,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 20:20:46,344 INFO L175 Difference]: Start difference. First operand has 297 places, 400 transitions, 5945 flow. Second operand 10 states and 170 transitions. [2024-06-21 20:20:46,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 447 transitions, 7033 flow [2024-06-21 20:20:47,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 447 transitions, 6976 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 20:20:47,590 INFO L231 Difference]: Finished difference. Result has 298 places, 400 transitions, 5948 flow [2024-06-21 20:20:47,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5888, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5948, PETRI_PLACES=298, PETRI_TRANSITIONS=400} [2024-06-21 20:20:47,593 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-21 20:20:47,593 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 400 transitions, 5948 flow [2024-06-21 20:20:47,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:47,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:47,594 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 20:20:47,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:20:47,594 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 20:20:47,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:47,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1703438686, now seen corresponding path program 1 times [2024-06-21 20:20:47,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:47,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725088638] [2024-06-21 20:20:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:47,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:48,527 INFO 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 20:20:48,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725088638] [2024-06-21 20:20:48,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725088638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:48,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:48,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:20:48,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604307712] [2024-06-21 20:20:48,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:48,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:20:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:20:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:20:48,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:20:48,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 400 transitions, 5948 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:48,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:48,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:20:48,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:50,433 INFO L124 PetriNetUnfolderBase]: 5513/8456 cut-off events. [2024-06-21 20:20:50,433 INFO L125 PetriNetUnfolderBase]: For 851256/851290 co-relation queries the response was YES. [2024-06-21 20:20:50,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72180 conditions, 8456 events. 5513/8456 cut-off events. For 851256/851290 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 49378 event pairs, 1415 based on Foata normal form. 20/8423 useless extension candidates. Maximal degree in co-relation 72038. Up to 7891 conditions per place. [2024-06-21 20:20:50,547 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 88 changer transitions 0/422 dead transitions. [2024-06-21 20:20:50,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 422 transitions, 6780 flow [2024-06-21 20:20:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 20:20:50,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-21 20:20:50,548 INFO L175 Difference]: Start difference. First operand has 298 places, 400 transitions, 5948 flow. Second operand 9 states and 150 transitions. [2024-06-21 20:20:50,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 422 transitions, 6780 flow [2024-06-21 20:20:51,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 422 transitions, 6459 flow, removed 35 selfloop flow, removed 12 redundant places. [2024-06-21 20:20:51,944 INFO L231 Difference]: Finished difference. Result has 295 places, 400 transitions, 5818 flow [2024-06-21 20:20:51,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5818, PETRI_PLACES=295, PETRI_TRANSITIONS=400} [2024-06-21 20:20:51,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-21 20:20:51,945 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 400 transitions, 5818 flow [2024-06-21 20:20:51,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:51,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:51,945 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 20:20:51,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:20:51,946 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 20:20:51,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:51,946 INFO L85 PathProgramCache]: Analyzing trace with hash 493162654, now seen corresponding path program 2 times [2024-06-21 20:20:51,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:51,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272106777] [2024-06-21 20:20:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:51,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:52,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272106777] [2024-06-21 20:20:52,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272106777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:52,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:52,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:20:52,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485352238] [2024-06-21 20:20:52,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:52,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:20:52,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:20:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:20:52,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 20:20:52,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 400 transitions, 5818 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:52,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:52,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 20:20:52,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:54,548 INFO L124 PetriNetUnfolderBase]: 5503/8444 cut-off events. [2024-06-21 20:20:54,549 INFO L125 PetriNetUnfolderBase]: For 856740/856769 co-relation queries the response was YES. [2024-06-21 20:20:54,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70450 conditions, 8444 events. 5503/8444 cut-off events. For 856740/856769 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 49324 event pairs, 1404 based on Foata normal form. 18/8411 useless extension candidates. Maximal degree in co-relation 70310. Up to 7841 conditions per place. [2024-06-21 20:20:54,657 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 85 changer transitions 0/419 dead transitions. [2024-06-21 20:20:54,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 419 transitions, 6632 flow [2024-06-21 20:20:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:20:54,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 20:20:54,658 INFO L175 Difference]: Start difference. First operand has 295 places, 400 transitions, 5818 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:20:54,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 419 transitions, 6632 flow [2024-06-21 20:20:56,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 419 transitions, 6409 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 20:20:56,344 INFO L231 Difference]: Finished difference. Result has 294 places, 400 transitions, 5771 flow [2024-06-21 20:20:56,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5771, PETRI_PLACES=294, PETRI_TRANSITIONS=400} [2024-06-21 20:20:56,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-21 20:20:56,345 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 400 transitions, 5771 flow [2024-06-21 20:20:56,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:56,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:56,345 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 20:20:56,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:20:56,345 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:56,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:56,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1987445813, now seen corresponding path program 8 times [2024-06-21 20:20:56,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:56,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434906689] [2024-06-21 20:20:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:56,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:57,671 INFO 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 20:20:57,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:57,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434906689] [2024-06-21 20:20:57,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434906689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:57,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:57,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:20:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548467780] [2024-06-21 20:20:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:20:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:57,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:20:57,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:20:57,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:20:57,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 400 transitions, 5771 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:57,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:57,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:20:57,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:00,045 INFO L124 PetriNetUnfolderBase]: 6163/9385 cut-off events. [2024-06-21 20:21:00,046 INFO L125 PetriNetUnfolderBase]: For 901154/901158 co-relation queries the response was YES. [2024-06-21 20:21:00,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75202 conditions, 9385 events. 6163/9385 cut-off events. For 901154/901158 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 55041 event pairs, 1303 based on Foata normal form. 28/9411 useless extension candidates. Maximal degree in co-relation 75062. Up to 8064 conditions per place. [2024-06-21 20:21:00,166 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 399 selfloop transitions, 96 changer transitions 0/498 dead transitions. [2024-06-21 20:21:00,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 498 transitions, 7519 flow [2024-06-21 20:21:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:21:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:21:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-21 20:21:00,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 20:21:00,167 INFO L175 Difference]: Start difference. First operand has 294 places, 400 transitions, 5771 flow. Second operand 12 states and 210 transitions. [2024-06-21 20:21:00,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 498 transitions, 7519 flow [2024-06-21 20:21:01,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 498 transitions, 7260 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:01,430 INFO L231 Difference]: Finished difference. Result has 302 places, 435 transitions, 6276 flow [2024-06-21 20:21:01,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6276, PETRI_PLACES=302, PETRI_TRANSITIONS=435} [2024-06-21 20:21:01,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-21 20:21:01,431 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 435 transitions, 6276 flow [2024-06-21 20:21:01,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:01,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:01,431 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 20:21:01,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:21:01,432 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:01,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash -470046133, now seen corresponding path program 9 times [2024-06-21 20:21:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:01,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820746769] [2024-06-21 20:21:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:01,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:02,845 INFO 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 20:21:02,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:02,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820746769] [2024-06-21 20:21:02,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820746769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:02,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:02,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:21:02,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464293860] [2024-06-21 20:21:02,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:02,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:21:02,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:02,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:21:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:21:02,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:02,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 435 transitions, 6276 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:02,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:02,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:02,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:05,246 INFO L124 PetriNetUnfolderBase]: 6135/9335 cut-off events. [2024-06-21 20:21:05,246 INFO L125 PetriNetUnfolderBase]: For 871298/871300 co-relation queries the response was YES. [2024-06-21 20:21:05,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75493 conditions, 9335 events. 6135/9335 cut-off events. For 871298/871300 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 54511 event pairs, 1400 based on Foata normal form. 18/9351 useless extension candidates. Maximal degree in co-relation 75349. Up to 8284 conditions per place. [2024-06-21 20:21:05,369 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 409 selfloop transitions, 75 changer transitions 0/487 dead transitions. [2024-06-21 20:21:05,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 487 transitions, 7419 flow [2024-06-21 20:21:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:21:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:21:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 20:21:05,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-21 20:21:05,371 INFO L175 Difference]: Start difference. First operand has 302 places, 435 transitions, 6276 flow. Second operand 10 states and 177 transitions. [2024-06-21 20:21:05,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 487 transitions, 7419 flow [2024-06-21 20:21:07,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 487 transitions, 7163 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:07,165 INFO L231 Difference]: Finished difference. Result has 305 places, 436 transitions, 6141 flow [2024-06-21 20:21:07,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6141, PETRI_PLACES=305, PETRI_TRANSITIONS=436} [2024-06-21 20:21:07,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-21 20:21:07,181 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 436 transitions, 6141 flow [2024-06-21 20:21:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:07,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:07,181 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 20:21:07,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:21:07,181 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 20:21:07,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:07,182 INFO L85 PathProgramCache]: Analyzing trace with hash 264671520, now seen corresponding path program 1 times [2024-06-21 20:21:07,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:07,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384620815] [2024-06-21 20:21:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:07,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:08,200 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 20:21:08,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:08,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384620815] [2024-06-21 20:21:08,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384620815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:08,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:08,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:21:08,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440134942] [2024-06-21 20:21:08,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:08,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:21:08,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:08,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:21:08,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:21:08,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:08,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 436 transitions, 6141 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:21:08,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:08,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:08,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:10,197 INFO L124 PetriNetUnfolderBase]: 6215/9459 cut-off events. [2024-06-21 20:21:10,198 INFO L125 PetriNetUnfolderBase]: For 862169/862169 co-relation queries the response was YES. [2024-06-21 20:21:10,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75957 conditions, 9459 events. 6215/9459 cut-off events. For 862169/862169 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 55581 event pairs, 2233 based on Foata normal form. 6/9463 useless extension candidates. Maximal degree in co-relation 75812. Up to 9253 conditions per place. [2024-06-21 20:21:10,327 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 445 selfloop transitions, 26 changer transitions 0/474 dead transitions. [2024-06-21 20:21:10,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 474 transitions, 7515 flow [2024-06-21 20:21:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 20:21:10,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-21 20:21:10,329 INFO L175 Difference]: Start difference. First operand has 305 places, 436 transitions, 6141 flow. Second operand 9 states and 143 transitions. [2024-06-21 20:21:10,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 474 transitions, 7515 flow [2024-06-21 20:21:12,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 474 transitions, 7400 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:21:12,063 INFO L231 Difference]: Finished difference. Result has 309 places, 445 transitions, 6271 flow [2024-06-21 20:21:12,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6026, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6271, PETRI_PLACES=309, PETRI_TRANSITIONS=445} [2024-06-21 20:21:12,064 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 20:21:12,064 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 445 transitions, 6271 flow [2024-06-21 20:21:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:21:12,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:12,064 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 20:21:12,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:21:12,065 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 20:21:12,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:12,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1944609930, now seen corresponding path program 2 times [2024-06-21 20:21:12,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:12,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149336982] [2024-06-21 20:21:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:12,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:13,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:13,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149336982] [2024-06-21 20:21:13,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149336982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:13,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:13,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:21:13,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164244837] [2024-06-21 20:21:13,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:13,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:21:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:21:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:21:13,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:13,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 445 transitions, 6271 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:13,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:13,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:13,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:15,430 INFO L124 PetriNetUnfolderBase]: 6241/9495 cut-off events. [2024-06-21 20:21:15,430 INFO L125 PetriNetUnfolderBase]: For 882370/882370 co-relation queries the response was YES. [2024-06-21 20:21:15,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77223 conditions, 9495 events. 6241/9495 cut-off events. For 882370/882370 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 55837 event pairs, 2238 based on Foata normal form. 2/9495 useless extension candidates. Maximal degree in co-relation 77076. Up to 9333 conditions per place. [2024-06-21 20:21:15,554 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 431 selfloop transitions, 45 changer transitions 0/479 dead transitions. [2024-06-21 20:21:15,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 479 transitions, 7712 flow [2024-06-21 20:21:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 20:21:15,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-21 20:21:15,555 INFO L175 Difference]: Start difference. First operand has 309 places, 445 transitions, 6271 flow. Second operand 9 states and 138 transitions. [2024-06-21 20:21:15,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 479 transitions, 7712 flow [2024-06-21 20:21:17,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 479 transitions, 7561 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 20:21:17,208 INFO L231 Difference]: Finished difference. Result has 315 places, 457 transitions, 6517 flow [2024-06-21 20:21:17,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6517, PETRI_PLACES=315, PETRI_TRANSITIONS=457} [2024-06-21 20:21:17,209 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-21 20:21:17,209 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 457 transitions, 6517 flow [2024-06-21 20:21:17,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:17,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:17,209 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 20:21:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:21:17,210 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 20:21:17,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:17,210 INFO L85 PathProgramCache]: Analyzing trace with hash 406918740, now seen corresponding path program 3 times [2024-06-21 20:21:17,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:17,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28408185] [2024-06-21 20:21:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:17,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:18,301 INFO 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 20:21:18,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28408185] [2024-06-21 20:21:18,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28408185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:18,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:18,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:21:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558146307] [2024-06-21 20:21:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:18,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:21:18,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:21:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:21:18,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:18,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 457 transitions, 6517 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:18,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:18,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:18,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:20,431 INFO L124 PetriNetUnfolderBase]: 6229/9479 cut-off events. [2024-06-21 20:21:20,431 INFO L125 PetriNetUnfolderBase]: For 901309/901309 co-relation queries the response was YES. [2024-06-21 20:21:20,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77459 conditions, 9479 events. 6229/9479 cut-off events. For 901309/901309 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 55776 event pairs, 2245 based on Foata normal form. 4/9481 useless extension candidates. Maximal degree in co-relation 77308. Up to 9350 conditions per place. [2024-06-21 20:21:20,565 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 439 selfloop transitions, 33 changer transitions 0/475 dead transitions. [2024-06-21 20:21:20,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 475 transitions, 7525 flow [2024-06-21 20:21:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:21:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:21:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 20:21:20,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-21 20:21:20,567 INFO L175 Difference]: Start difference. First operand has 315 places, 457 transitions, 6517 flow. Second operand 8 states and 123 transitions. [2024-06-21 20:21:20,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 475 transitions, 7525 flow [2024-06-21 20:21:22,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 475 transitions, 7328 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-21 20:21:22,502 INFO L231 Difference]: Finished difference. Result has 319 places, 457 transitions, 6396 flow [2024-06-21 20:21:22,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6396, PETRI_PLACES=319, PETRI_TRANSITIONS=457} [2024-06-21 20:21:22,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-21 20:21:22,502 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 457 transitions, 6396 flow [2024-06-21 20:21:22,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:22,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:22,503 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 20:21:22,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:21:22,503 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 20:21:22,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:22,503 INFO L85 PathProgramCache]: Analyzing trace with hash 412496446, now seen corresponding path program 1 times [2024-06-21 20:21:22,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:22,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069565712] [2024-06-21 20:21:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:22,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:23,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:23,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069565712] [2024-06-21 20:21:23,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069565712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:23,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:23,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:21:23,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158683951] [2024-06-21 20:21:23,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:23,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:21:23,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:23,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:21:23,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:21:23,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:23,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 457 transitions, 6396 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:23,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:23,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:23,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:25,608 INFO L124 PetriNetUnfolderBase]: 6261/9515 cut-off events. [2024-06-21 20:21:25,608 INFO L125 PetriNetUnfolderBase]: For 925912/925919 co-relation queries the response was YES. [2024-06-21 20:21:25,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77955 conditions, 9515 events. 6261/9515 cut-off events. For 925912/925919 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 55826 event pairs, 2080 based on Foata normal form. 10/9520 useless extension candidates. Maximal degree in co-relation 77802. Up to 9066 conditions per place. [2024-06-21 20:21:25,756 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 396 selfloop transitions, 86 changer transitions 0/485 dead transitions. [2024-06-21 20:21:25,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 485 transitions, 7750 flow [2024-06-21 20:21:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 20:21:25,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-21 20:21:25,761 INFO L175 Difference]: Start difference. First operand has 319 places, 457 transitions, 6396 flow. Second operand 9 states and 144 transitions. [2024-06-21 20:21:25,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 485 transitions, 7750 flow [2024-06-21 20:21:27,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 485 transitions, 7638 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:27,637 INFO L231 Difference]: Finished difference. Result has 321 places, 461 transitions, 6568 flow [2024-06-21 20:21:27,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6284, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6568, PETRI_PLACES=321, PETRI_TRANSITIONS=461} [2024-06-21 20:21:27,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-21 20:21:27,638 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 461 transitions, 6568 flow [2024-06-21 20:21:27,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:27,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:27,638 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 20:21:27,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:21:27,638 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 20:21:27,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash 499827902, now seen corresponding path program 4 times [2024-06-21 20:21:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:27,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042557568] [2024-06-21 20:21:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:27,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:28,779 INFO 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 20:21:28,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:28,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042557568] [2024-06-21 20:21:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042557568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:28,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:28,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:21:28,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999009204] [2024-06-21 20:21:28,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:28,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:21:28,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:21:28,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:21:28,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:28,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 461 transitions, 6568 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:21:28,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:28,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:28,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:30,983 INFO L124 PetriNetUnfolderBase]: 6265/9531 cut-off events. [2024-06-21 20:21:30,983 INFO L125 PetriNetUnfolderBase]: For 934191/934193 co-relation queries the response was YES. [2024-06-21 20:21:31,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78522 conditions, 9531 events. 6265/9531 cut-off events. For 934191/934193 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 56333 event pairs, 2306 based on Foata normal form. 4/9533 useless extension candidates. Maximal degree in co-relation 78369. Up to 9391 conditions per place. [2024-06-21 20:21:31,095 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 441 selfloop transitions, 45 changer transitions 0/489 dead transitions. [2024-06-21 20:21:31,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 489 transitions, 7745 flow [2024-06-21 20:21:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:21:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:21:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-21 20:21:31,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34651162790697676 [2024-06-21 20:21:31,096 INFO L175 Difference]: Start difference. First operand has 321 places, 461 transitions, 6568 flow. Second operand 10 states and 149 transitions. [2024-06-21 20:21:31,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 489 transitions, 7745 flow [2024-06-21 20:21:32,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 489 transitions, 7526 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 20:21:32,839 INFO L231 Difference]: Finished difference. Result has 326 places, 467 transitions, 6568 flow [2024-06-21 20:21:32,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6568, PETRI_PLACES=326, PETRI_TRANSITIONS=467} [2024-06-21 20:21:32,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-21 20:21:32,840 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 467 transitions, 6568 flow [2024-06-21 20:21:32,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:21:32,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:32,841 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 20:21:32,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:21:32,841 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 20:21:32,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1703980380, now seen corresponding path program 2 times [2024-06-21 20:21:32,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:32,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099983321] [2024-06-21 20:21:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:32,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099983321] [2024-06-21 20:21:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099983321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:33,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:21:33,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087657896] [2024-06-21 20:21:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:33,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:21:33,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:21:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:21:34,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:34,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 467 transitions, 6568 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:34,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:34,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:34,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:36,390 INFO L124 PetriNetUnfolderBase]: 6296/9574 cut-off events. [2024-06-21 20:21:36,390 INFO L125 PetriNetUnfolderBase]: For 964553/964555 co-relation queries the response was YES. [2024-06-21 20:21:36,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79477 conditions, 9574 events. 6296/9574 cut-off events. For 964553/964555 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 56512 event pairs, 2287 based on Foata normal form. 4/9576 useless extension candidates. Maximal degree in co-relation 79322. Up to 9329 conditions per place. [2024-06-21 20:21:36,522 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 424 selfloop transitions, 75 changer transitions 0/502 dead transitions. [2024-06-21 20:21:36,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 502 transitions, 8227 flow [2024-06-21 20:21:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:21:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:21:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-21 20:21:36,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-21 20:21:36,523 INFO L175 Difference]: Start difference. First operand has 326 places, 467 transitions, 6568 flow. Second operand 10 states and 155 transitions. [2024-06-21 20:21:36,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 502 transitions, 8227 flow [2024-06-21 20:21:38,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 502 transitions, 7969 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-21 20:21:38,396 INFO L231 Difference]: Finished difference. Result has 329 places, 477 transitions, 6704 flow [2024-06-21 20:21:38,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6311, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6704, PETRI_PLACES=329, PETRI_TRANSITIONS=477} [2024-06-21 20:21:38,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-21 20:21:38,397 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 477 transitions, 6704 flow [2024-06-21 20:21:38,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:38,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:38,397 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 20:21:38,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:21:38,398 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 20:21:38,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1437956670, now seen corresponding path program 3 times [2024-06-21 20:21:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359836164] [2024-06-21 20:21:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:39,787 INFO 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 20:21:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359836164] [2024-06-21 20:21:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359836164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:39,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:39,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:21:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235248908] [2024-06-21 20:21:39,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:21:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:21:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:21:39,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:39,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 477 transitions, 6704 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:39,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:39,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:39,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:42,131 INFO L124 PetriNetUnfolderBase]: 6284/9558 cut-off events. [2024-06-21 20:21:42,132 INFO L125 PetriNetUnfolderBase]: For 986034/986036 co-relation queries the response was YES. [2024-06-21 20:21:42,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79913 conditions, 9558 events. 6284/9558 cut-off events. For 986034/986036 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 56428 event pairs, 2312 based on Foata normal form. 6/9562 useless extension candidates. Maximal degree in co-relation 79756. Up to 9425 conditions per place. [2024-06-21 20:21:42,264 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 459 selfloop transitions, 37 changer transitions 0/499 dead transitions. [2024-06-21 20:21:42,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 499 transitions, 7814 flow [2024-06-21 20:21:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 20:21:42,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-21 20:21:42,266 INFO L175 Difference]: Start difference. First operand has 329 places, 477 transitions, 6704 flow. Second operand 9 states and 140 transitions. [2024-06-21 20:21:42,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 499 transitions, 7814 flow [2024-06-21 20:21:44,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 499 transitions, 7581 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-21 20:21:44,304 INFO L231 Difference]: Finished difference. Result has 332 places, 477 transitions, 6553 flow [2024-06-21 20:21:44,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6553, PETRI_PLACES=332, PETRI_TRANSITIONS=477} [2024-06-21 20:21:44,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-21 20:21:44,305 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 477 transitions, 6553 flow [2024-06-21 20:21:44,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:44,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:44,305 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 20:21:44,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:21:44,305 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 20:21:44,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:44,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1694457180, now seen corresponding path program 4 times [2024-06-21 20:21:44,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:44,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299915691] [2024-06-21 20:21:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:44,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:45,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299915691] [2024-06-21 20:21:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299915691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:45,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:45,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:21:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778383753] [2024-06-21 20:21:45,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:21:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:21:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:21:45,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:45,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 477 transitions, 6553 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:45,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:45,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:45,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:47,602 INFO L124 PetriNetUnfolderBase]: 6298/9571 cut-off events. [2024-06-21 20:21:47,602 INFO L125 PetriNetUnfolderBase]: For 1005010/1005019 co-relation queries the response was YES. [2024-06-21 20:21:47,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79936 conditions, 9571 events. 6298/9571 cut-off events. For 1005010/1005019 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 56450 event pairs, 2093 based on Foata normal form. 10/9576 useless extension candidates. Maximal degree in co-relation 79777. Up to 8827 conditions per place. [2024-06-21 20:21:47,726 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 366 selfloop transitions, 138 changer transitions 0/507 dead transitions. [2024-06-21 20:21:47,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 507 transitions, 8327 flow [2024-06-21 20:21:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 20:21:47,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-21 20:21:47,728 INFO L175 Difference]: Start difference. First operand has 332 places, 477 transitions, 6553 flow. Second operand 9 states and 149 transitions. [2024-06-21 20:21:47,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 507 transitions, 8327 flow [2024-06-21 20:21:50,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 507 transitions, 8251 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:50,025 INFO L231 Difference]: Finished difference. Result has 334 places, 482 transitions, 6895 flow [2024-06-21 20:21:50,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6895, PETRI_PLACES=334, PETRI_TRANSITIONS=482} [2024-06-21 20:21:50,026 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-21 20:21:50,026 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 482 transitions, 6895 flow [2024-06-21 20:21:50,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:50,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:50,026 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 20:21:50,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:21:50,027 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 20:21:50,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:50,027 INFO L85 PathProgramCache]: Analyzing trace with hash 647306013, now seen corresponding path program 1 times [2024-06-21 20:21:50,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:50,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001134491] [2024-06-21 20:21:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:50,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:50,680 INFO 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 20:21:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:50,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001134491] [2024-06-21 20:21:50,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001134491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:50,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:50,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:21:50,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168411598] [2024-06-21 20:21:50,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:50,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:21:50,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:21:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:21:50,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:50,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 482 transitions, 6895 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:50,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:50,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:50,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:52,981 INFO L124 PetriNetUnfolderBase]: 6386/9706 cut-off events. [2024-06-21 20:21:52,981 INFO L125 PetriNetUnfolderBase]: For 1021350/1021352 co-relation queries the response was YES. [2024-06-21 20:21:53,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82033 conditions, 9706 events. 6386/9706 cut-off events. For 1021350/1021352 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 57292 event pairs, 1628 based on Foata normal form. 6/9710 useless extension candidates. Maximal degree in co-relation 81873. Up to 9374 conditions per place. [2024-06-21 20:21:53,131 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 465 selfloop transitions, 62 changer transitions 0/530 dead transitions. [2024-06-21 20:21:53,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 530 transitions, 8392 flow [2024-06-21 20:21:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:21:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:21:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:21:53,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 20:21:53,132 INFO L175 Difference]: Start difference. First operand has 334 places, 482 transitions, 6895 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:21:53,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 530 transitions, 8392 flow [2024-06-21 20:21:55,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 530 transitions, 8004 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:55,558 INFO L231 Difference]: Finished difference. Result has 336 places, 503 transitions, 7048 flow [2024-06-21 20:21:55,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7048, PETRI_PLACES=336, PETRI_TRANSITIONS=503} [2024-06-21 20:21:55,559 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-21 20:21:55,559 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 503 transitions, 7048 flow [2024-06-21 20:21:55,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:55,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:55,559 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 20:21:55,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:21:55,559 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 20:21:55,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:55,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1555922449, now seen corresponding path program 2 times [2024-06-21 20:21:55,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:55,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965345122] [2024-06-21 20:21:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:55,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:56,515 INFO 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 20:21:56,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:56,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965345122] [2024-06-21 20:21:56,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965345122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:56,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:56,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:21:56,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058882543] [2024-06-21 20:21:56,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:56,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:21:56,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:21:56,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:21:56,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:21:56,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 503 transitions, 7048 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 20:21:56,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:56,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:21:56,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:58,782 INFO L124 PetriNetUnfolderBase]: 6416/9748 cut-off events. [2024-06-21 20:21:58,782 INFO L125 PetriNetUnfolderBase]: For 1047040/1047042 co-relation queries the response was YES. [2024-06-21 20:21:58,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83801 conditions, 9748 events. 6416/9748 cut-off events. For 1047040/1047042 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 57455 event pairs, 1605 based on Foata normal form. 6/9752 useless extension candidates. Maximal degree in co-relation 83639. Up to 9372 conditions per place. [2024-06-21 20:21:58,924 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 468 selfloop transitions, 68 changer transitions 0/539 dead transitions. [2024-06-21 20:21:58,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 539 transitions, 8367 flow [2024-06-21 20:21:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 20:21:58,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-21 20:21:58,925 INFO L175 Difference]: Start difference. First operand has 336 places, 503 transitions, 7048 flow. Second operand 9 states and 146 transitions. [2024-06-21 20:21:58,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 539 transitions, 8367 flow [2024-06-21 20:22:00,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 539 transitions, 8212 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 20:22:00,793 INFO L231 Difference]: Finished difference. Result has 342 places, 509 transitions, 7183 flow [2024-06-21 20:22:00,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6893, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7183, PETRI_PLACES=342, PETRI_TRANSITIONS=509} [2024-06-21 20:22:00,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-21 20:22:00,793 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 509 transitions, 7183 flow [2024-06-21 20:22:00,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 20:22:00,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:00,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:22:00,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:22:00,794 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 20:22:00,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:00,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1941953167, now seen corresponding path program 3 times [2024-06-21 20:22:00,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:00,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793650672] [2024-06-21 20:22:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:00,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:01,508 INFO 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 20:22:01,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:01,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793650672] [2024-06-21 20:22:01,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793650672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:01,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:01,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:22:01,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421213918] [2024-06-21 20:22:01,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:01,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:22:01,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:22:01,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:22:01,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:01,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 509 transitions, 7183 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:01,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:01,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:01,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:03,766 INFO L124 PetriNetUnfolderBase]: 6458/9810 cut-off events. [2024-06-21 20:22:03,766 INFO L125 PetriNetUnfolderBase]: For 1074102/1074104 co-relation queries the response was YES. [2024-06-21 20:22:03,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84663 conditions, 9810 events. 6458/9810 cut-off events. For 1074102/1074104 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 57828 event pairs, 1414 based on Foata normal form. 4/9812 useless extension candidates. Maximal degree in co-relation 84499. Up to 9039 conditions per place. [2024-06-21 20:22:03,909 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 437 selfloop transitions, 125 changer transitions 0/565 dead transitions. [2024-06-21 20:22:03,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 565 transitions, 8878 flow [2024-06-21 20:22:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:22:03,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-21 20:22:03,911 INFO L175 Difference]: Start difference. First operand has 342 places, 509 transitions, 7183 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:22:03,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 565 transitions, 8878 flow [2024-06-21 20:22:06,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 565 transitions, 8676 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:22:06,207 INFO L231 Difference]: Finished difference. Result has 344 places, 537 transitions, 7706 flow [2024-06-21 20:22:06,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7706, PETRI_PLACES=344, PETRI_TRANSITIONS=537} [2024-06-21 20:22:06,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-21 20:22:06,208 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 537 transitions, 7706 flow [2024-06-21 20:22:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:06,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:06,208 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 20:22:06,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:22:06,209 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 20:22:06,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1664281023, now seen corresponding path program 4 times [2024-06-21 20:22:06,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:06,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181326819] [2024-06-21 20:22:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:07,187 INFO 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 20:22:07,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:07,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181326819] [2024-06-21 20:22:07,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181326819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:07,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:07,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:22:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006813004] [2024-06-21 20:22:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:22:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:22:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:22:07,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:07,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 537 transitions, 7706 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:07,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:07,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:07,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:09,794 INFO L124 PetriNetUnfolderBase]: 6670/10100 cut-off events. [2024-06-21 20:22:09,794 INFO L125 PetriNetUnfolderBase]: For 1119376/1119378 co-relation queries the response was YES. [2024-06-21 20:22:09,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88638 conditions, 10100 events. 6670/10100 cut-off events. For 1119376/1119378 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 59433 event pairs, 1488 based on Foata normal form. 4/10097 useless extension candidates. Maximal degree in co-relation 88473. Up to 9140 conditions per place. [2024-06-21 20:22:09,929 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 467 selfloop transitions, 141 changer transitions 0/611 dead transitions. [2024-06-21 20:22:09,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 611 transitions, 10025 flow [2024-06-21 20:22:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:22:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:22:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 20:22:09,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 20:22:09,931 INFO L175 Difference]: Start difference. First operand has 344 places, 537 transitions, 7706 flow. Second operand 9 states and 153 transitions. [2024-06-21 20:22:09,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 611 transitions, 10025 flow [2024-06-21 20:22:12,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 611 transitions, 9775 flow, removed 124 selfloop flow, removed 1 redundant places. [2024-06-21 20:22:12,752 INFO L231 Difference]: Finished difference. Result has 353 places, 568 transitions, 8503 flow [2024-06-21 20:22:12,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7580, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8503, PETRI_PLACES=353, PETRI_TRANSITIONS=568} [2024-06-21 20:22:12,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-21 20:22:12,753 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 568 transitions, 8503 flow [2024-06-21 20:22:12,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:12,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:12,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:22:12,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:22:12,754 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 20:22:12,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:12,754 INFO L85 PathProgramCache]: Analyzing trace with hash -706878419, now seen corresponding path program 5 times [2024-06-21 20:22:12,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:12,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832499989] [2024-06-21 20:22:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:12,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:13,673 INFO 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 20:22:13,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:13,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832499989] [2024-06-21 20:22:13,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832499989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:13,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:13,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:22:13,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936648447] [2024-06-21 20:22:13,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:13,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:22:13,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:22:13,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:22:13,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:13,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 568 transitions, 8503 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:13,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:13,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:13,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:16,120 INFO L124 PetriNetUnfolderBase]: 6754/10217 cut-off events. [2024-06-21 20:22:16,120 INFO L125 PetriNetUnfolderBase]: For 1179551/1179553 co-relation queries the response was YES. [2024-06-21 20:22:16,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90558 conditions, 10217 events. 6754/10217 cut-off events. For 1179551/1179553 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 60226 event pairs, 1502 based on Foata normal form. 4/10219 useless extension candidates. Maximal degree in co-relation 90389. Up to 8924 conditions per place. [2024-06-21 20:22:16,269 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 422 selfloop transitions, 180 changer transitions 0/605 dead transitions. [2024-06-21 20:22:16,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 605 transitions, 10500 flow [2024-06-21 20:22:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:22:16,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 20:22:16,270 INFO L175 Difference]: Start difference. First operand has 353 places, 568 transitions, 8503 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:22:16,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 605 transitions, 10500 flow [2024-06-21 20:22:19,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 605 transitions, 10297 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-21 20:22:19,074 INFO L231 Difference]: Finished difference. Result has 358 places, 577 transitions, 8985 flow [2024-06-21 20:22:19,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8985, PETRI_PLACES=358, PETRI_TRANSITIONS=577} [2024-06-21 20:22:19,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-21 20:22:19,075 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 577 transitions, 8985 flow [2024-06-21 20:22:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:19,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:19,076 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 20:22:19,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:22:19,076 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 20:22:19,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash -342089857, now seen corresponding path program 6 times [2024-06-21 20:22:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41931909] [2024-06-21 20:22:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:19,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:19,920 INFO 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 20:22:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41931909] [2024-06-21 20:22:19,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41931909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:19,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:19,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:22:19,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943653140] [2024-06-21 20:22:19,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:19,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:22:19,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:22:19,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:22:19,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:19,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 577 transitions, 8985 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:19,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:19,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:19,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:22,672 INFO L124 PetriNetUnfolderBase]: 6742/10196 cut-off events. [2024-06-21 20:22:22,672 INFO L125 PetriNetUnfolderBase]: For 1192216/1192216 co-relation queries the response was YES. [2024-06-21 20:22:22,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91198 conditions, 10196 events. 6742/10196 cut-off events. For 1192216/1192216 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 60054 event pairs, 1459 based on Foata normal form. 4/10198 useless extension candidates. Maximal degree in co-relation 91027. Up to 9936 conditions per place. [2024-06-21 20:22:22,802 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 540 selfloop transitions, 55 changer transitions 0/598 dead transitions. [2024-06-21 20:22:22,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 598 transitions, 10259 flow [2024-06-21 20:22:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 20:22:22,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-21 20:22:22,803 INFO L175 Difference]: Start difference. First operand has 358 places, 577 transitions, 8985 flow. Second operand 8 states and 127 transitions. [2024-06-21 20:22:22,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 598 transitions, 10259 flow [2024-06-21 20:22:25,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 598 transitions, 9926 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-21 20:22:25,694 INFO L231 Difference]: Finished difference. Result has 362 places, 577 transitions, 8769 flow [2024-06-21 20:22:25,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8652, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8769, PETRI_PLACES=362, PETRI_TRANSITIONS=577} [2024-06-21 20:22:25,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 20:22:25,695 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 577 transitions, 8769 flow [2024-06-21 20:22:25,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:25,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:25,695 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 20:22:25,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:22:25,696 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 20:22:25,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash -667102723, now seen corresponding path program 1 times [2024-06-21 20:22:25,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:25,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892404022] [2024-06-21 20:22:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:25,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:26,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:26,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892404022] [2024-06-21 20:22:26,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892404022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:26,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:26,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:22:26,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933526389] [2024-06-21 20:22:26,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:26,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:22:26,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:22:26,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:22:26,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:26,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 577 transitions, 8769 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 20:22:26,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:26,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:26,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:29,497 INFO L124 PetriNetUnfolderBase]: 6750/10212 cut-off events. [2024-06-21 20:22:29,497 INFO L125 PetriNetUnfolderBase]: For 1197988/1197990 co-relation queries the response was YES. [2024-06-21 20:22:29,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90806 conditions, 10212 events. 6750/10212 cut-off events. For 1197988/1197990 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 60092 event pairs, 1534 based on Foata normal form. 4/10214 useless extension candidates. Maximal degree in co-relation 90634. Up to 9946 conditions per place. [2024-06-21 20:22:29,645 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 555 selfloop transitions, 47 changer transitions 0/605 dead transitions. [2024-06-21 20:22:29,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 605 transitions, 10125 flow [2024-06-21 20:22:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:29,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:22:29,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:22:29,647 INFO L175 Difference]: Start difference. First operand has 362 places, 577 transitions, 8769 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:22:29,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 605 transitions, 10125 flow [2024-06-21 20:22:32,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 605 transitions, 9950 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:22:32,727 INFO L231 Difference]: Finished difference. Result has 363 places, 579 transitions, 8758 flow [2024-06-21 20:22:32,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8594, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8758, PETRI_PLACES=363, PETRI_TRANSITIONS=579} [2024-06-21 20:22:32,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-21 20:22:32,728 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 579 transitions, 8758 flow [2024-06-21 20:22:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 20:22:32,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:32,728 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 20:22:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:22:32,729 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 20:22:32,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2050898203, now seen corresponding path program 2 times [2024-06-21 20:22:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:32,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496933492] [2024-06-21 20:22:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:32,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:33,880 INFO 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 20:22:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496933492] [2024-06-21 20:22:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496933492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:33,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:33,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:22:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956635512] [2024-06-21 20:22:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:22:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:22:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:22:33,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:33,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 579 transitions, 8758 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 20:22:33,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:33,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:33,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:36,518 INFO L124 PetriNetUnfolderBase]: 6758/10224 cut-off events. [2024-06-21 20:22:36,518 INFO L125 PetriNetUnfolderBase]: For 1220551/1220553 co-relation queries the response was YES. [2024-06-21 20:22:36,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91271 conditions, 10224 events. 6758/10224 cut-off events. For 1220551/1220553 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 60336 event pairs, 1701 based on Foata normal form. 4/10226 useless extension candidates. Maximal degree in co-relation 91099. Up to 10003 conditions per place. [2024-06-21 20:22:36,669 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 555 selfloop transitions, 46 changer transitions 0/604 dead transitions. [2024-06-21 20:22:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 604 transitions, 10104 flow [2024-06-21 20:22:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 20:22:36,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-21 20:22:36,670 INFO L175 Difference]: Start difference. First operand has 363 places, 579 transitions, 8758 flow. Second operand 8 states and 127 transitions. [2024-06-21 20:22:36,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 604 transitions, 10104 flow [2024-06-21 20:22:39,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 604 transitions, 9934 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 20:22:39,984 INFO L231 Difference]: Finished difference. Result has 365 places, 581 transitions, 8753 flow [2024-06-21 20:22:39,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8588, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8753, PETRI_PLACES=365, PETRI_TRANSITIONS=581} [2024-06-21 20:22:39,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-21 20:22:39,985 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 581 transitions, 8753 flow [2024-06-21 20:22:39,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 20:22:39,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:39,986 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 20:22:39,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:22:39,986 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 20:22:39,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash -18534615, now seen corresponding path program 3 times [2024-06-21 20:22:39,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:39,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003272440] [2024-06-21 20:22:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:40,939 INFO 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 20:22:40,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:40,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003272440] [2024-06-21 20:22:40,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003272440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:40,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:40,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:22:40,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907824515] [2024-06-21 20:22:40,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:40,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:22:40,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:40,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:22:40,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:22:41,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:41,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 581 transitions, 8753 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 20:22:41,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:41,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:41,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:43,428 INFO L124 PetriNetUnfolderBase]: 6766/10232 cut-off events. [2024-06-21 20:22:43,428 INFO L125 PetriNetUnfolderBase]: For 1246314/1246314 co-relation queries the response was YES. [2024-06-21 20:22:43,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91711 conditions, 10232 events. 6766/10232 cut-off events. For 1246314/1246314 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 60243 event pairs, 1459 based on Foata normal form. 2/10232 useless extension candidates. Maximal degree in co-relation 91538. Up to 9984 conditions per place. [2024-06-21 20:22:43,593 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 546 selfloop transitions, 54 changer transitions 0/603 dead transitions. [2024-06-21 20:22:43,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 603 transitions, 10093 flow [2024-06-21 20:22:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 20:22:43,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-21 20:22:43,595 INFO L175 Difference]: Start difference. First operand has 365 places, 581 transitions, 8753 flow. Second operand 8 states and 125 transitions. [2024-06-21 20:22:43,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 603 transitions, 10093 flow [2024-06-21 20:22:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 603 transitions, 9930 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:22:46,442 INFO L231 Difference]: Finished difference. Result has 367 places, 583 transitions, 8776 flow [2024-06-21 20:22:46,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8590, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8776, PETRI_PLACES=367, PETRI_TRANSITIONS=583} [2024-06-21 20:22:46,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-21 20:22:46,443 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 583 transitions, 8776 flow [2024-06-21 20:22:46,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 20:22:46,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:46,443 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 20:22:46,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:22:46,443 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 20:22:46,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:46,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1769640849, now seen corresponding path program 1 times [2024-06-21 20:22:46,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:46,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112591658] [2024-06-21 20:22:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:46,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:47,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112591658] [2024-06-21 20:22:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112591658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:47,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:47,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:22:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368987599] [2024-06-21 20:22:47,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:47,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:22:47,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:22:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:22:47,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:47,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 583 transitions, 8776 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:22:47,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:47,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:47,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:49,786 INFO L124 PetriNetUnfolderBase]: 6786/10264 cut-off events. [2024-06-21 20:22:49,786 INFO L125 PetriNetUnfolderBase]: For 1281553/1281559 co-relation queries the response was YES. [2024-06-21 20:22:49,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92349 conditions, 10264 events. 6786/10264 cut-off events. For 1281553/1281559 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 60591 event pairs, 1896 based on Foata normal form. 8/10269 useless extension candidates. Maximal degree in co-relation 92175. Up to 9802 conditions per place. [2024-06-21 20:22:49,933 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 556 selfloop transitions, 68 changer transitions 0/627 dead transitions. [2024-06-21 20:22:49,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 627 transitions, 10397 flow [2024-06-21 20:22:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 20:22:49,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-21 20:22:49,935 INFO L175 Difference]: Start difference. First operand has 367 places, 583 transitions, 8776 flow. Second operand 8 states and 137 transitions. [2024-06-21 20:22:49,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 627 transitions, 10397 flow [2024-06-21 20:22:52,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 627 transitions, 10229 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:22:52,899 INFO L231 Difference]: Finished difference. Result has 370 places, 600 transitions, 9039 flow [2024-06-21 20:22:52,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8608, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9039, PETRI_PLACES=370, PETRI_TRANSITIONS=600} [2024-06-21 20:22:52,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-21 20:22:52,900 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 600 transitions, 9039 flow [2024-06-21 20:22:52,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:22:52,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:52,900 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 20:22:52,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:22:52,901 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 20:22:52,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash 413384243, now seen corresponding path program 2 times [2024-06-21 20:22:52,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10813389] [2024-06-21 20:22:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:52,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:53,784 INFO 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 20:22:53,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:53,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10813389] [2024-06-21 20:22:53,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10813389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:53,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:53,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:22:53,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716235457] [2024-06-21 20:22:53,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:53,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:22:53,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:22:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:22:53,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:22:53,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 600 transitions, 9039 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:53,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:53,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:22:53,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:56,370 INFO L124 PetriNetUnfolderBase]: 6816/10307 cut-off events. [2024-06-21 20:22:56,371 INFO L125 PetriNetUnfolderBase]: For 1311785/1311791 co-relation queries the response was YES. [2024-06-21 20:22:56,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93978 conditions, 10307 events. 6816/10307 cut-off events. For 1311785/1311791 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 60837 event pairs, 1895 based on Foata normal form. 8/10311 useless extension candidates. Maximal degree in co-relation 93802. Up to 9776 conditions per place. [2024-06-21 20:22:56,531 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 553 selfloop transitions, 81 changer transitions 0/637 dead transitions. [2024-06-21 20:22:56,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 637 transitions, 10654 flow [2024-06-21 20:22:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:22:56,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 20:22:56,532 INFO L175 Difference]: Start difference. First operand has 370 places, 600 transitions, 9039 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:22:56,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 637 transitions, 10654 flow [2024-06-21 20:23:00,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 637 transitions, 10542 flow, removed 55 selfloop flow, removed 1 redundant places. [2024-06-21 20:23:00,722 INFO L231 Difference]: Finished difference. Result has 378 places, 609 transitions, 9360 flow [2024-06-21 20:23:00,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8931, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9360, PETRI_PLACES=378, PETRI_TRANSITIONS=609} [2024-06-21 20:23:00,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-21 20:23:00,723 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 609 transitions, 9360 flow [2024-06-21 20:23:00,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:00,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:00,724 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 20:23:00,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:23:00,724 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 20:23:00,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:00,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2037839151, now seen corresponding path program 3 times [2024-06-21 20:23:00,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:00,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565499836] [2024-06-21 20:23:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:00,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:01,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:01,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565499836] [2024-06-21 20:23:01,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565499836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:01,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:01,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:23:01,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440159016] [2024-06-21 20:23:01,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:01,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:23:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:23:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:23:01,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:23:01,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 609 transitions, 9360 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:01,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:01,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:23:01,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:04,371 INFO L124 PetriNetUnfolderBase]: 6942/10485 cut-off events. [2024-06-21 20:23:04,371 INFO L125 PetriNetUnfolderBase]: For 1387715/1387721 co-relation queries the response was YES. [2024-06-21 20:23:04,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97165 conditions, 10485 events. 6942/10485 cut-off events. For 1387715/1387721 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 61972 event pairs, 1934 based on Foata normal form. 8/10490 useless extension candidates. Maximal degree in co-relation 96985. Up to 9857 conditions per place. [2024-06-21 20:23:04,541 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 562 selfloop transitions, 87 changer transitions 0/652 dead transitions. [2024-06-21 20:23:04,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 652 transitions, 11389 flow [2024-06-21 20:23:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:23:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:23:04,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:23:04,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 20:23:04,542 INFO L175 Difference]: Start difference. First operand has 378 places, 609 transitions, 9360 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:23:04,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 652 transitions, 11389 flow [2024-06-21 20:23:07,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 652 transitions, 11059 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:07,953 INFO L231 Difference]: Finished difference. Result has 383 places, 626 transitions, 9695 flow [2024-06-21 20:23:07,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9695, PETRI_PLACES=383, PETRI_TRANSITIONS=626} [2024-06-21 20:23:07,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-21 20:23:07,954 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 626 transitions, 9695 flow [2024-06-21 20:23:07,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:07,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:07,954 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 20:23:07,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:23:07,954 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 20:23:07,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash 346417039, now seen corresponding path program 1 times [2024-06-21 20:23:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:07,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117747537] [2024-06-21 20:23:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:07,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:08,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117747537] [2024-06-21 20:23:08,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117747537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:08,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:08,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:23:08,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47883732] [2024-06-21 20:23:08,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:08,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:23:08,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:23:08,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:23:08,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:23:08,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 626 transitions, 9695 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:08,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:08,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:23:08,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:11,387 INFO L124 PetriNetUnfolderBase]: 6950/10498 cut-off events. [2024-06-21 20:23:11,387 INFO L125 PetriNetUnfolderBase]: For 1420409/1420418 co-relation queries the response was YES. [2024-06-21 20:23:11,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98086 conditions, 10498 events. 6950/10498 cut-off events. For 1420409/1420418 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 62169 event pairs, 1997 based on Foata normal form. 12/10505 useless extension candidates. Maximal degree in co-relation 97903. Up to 9915 conditions per place. [2024-06-21 20:23:11,554 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 525 selfloop transitions, 123 changer transitions 0/651 dead transitions. [2024-06-21 20:23:11,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 651 transitions, 11412 flow [2024-06-21 20:23:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:23:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:23:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 20:23:11,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-21 20:23:11,556 INFO L175 Difference]: Start difference. First operand has 383 places, 626 transitions, 9695 flow. Second operand 8 states and 131 transitions. [2024-06-21 20:23:11,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 651 transitions, 11412 flow [2024-06-21 20:23:15,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 651 transitions, 11258 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-21 20:23:15,277 INFO L231 Difference]: Finished difference. Result has 389 places, 632 transitions, 9938 flow [2024-06-21 20:23:15,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9551, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9938, PETRI_PLACES=389, PETRI_TRANSITIONS=632} [2024-06-21 20:23:15,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-21 20:23:15,277 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 632 transitions, 9938 flow [2024-06-21 20:23:15,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:15,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:15,278 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 20:23:15,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:23:15,278 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 20:23:15,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1847502995, now seen corresponding path program 2 times [2024-06-21 20:23:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:15,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679919989] [2024-06-21 20:23:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:15,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:16,184 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 20:23:16,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:16,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679919989] [2024-06-21 20:23:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679919989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:16,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:16,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:23:16,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238276522] [2024-06-21 20:23:16,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:16,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:23:16,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:23:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:23:16,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:23:16,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 632 transitions, 9938 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:16,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:16,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:23:16,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:19,276 INFO L124 PetriNetUnfolderBase]: 7100/10708 cut-off events. [2024-06-21 20:23:19,276 INFO L125 PetriNetUnfolderBase]: For 1424129/1424135 co-relation queries the response was YES. [2024-06-21 20:23:19,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100161 conditions, 10708 events. 7100/10708 cut-off events. For 1424129/1424135 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63390 event pairs, 2005 based on Foata normal form. 8/10712 useless extension candidates. Maximal degree in co-relation 99975. Up to 10200 conditions per place. [2024-06-21 20:23:19,429 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 591 selfloop transitions, 89 changer transitions 0/683 dead transitions. [2024-06-21 20:23:19,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 683 transitions, 11752 flow [2024-06-21 20:23:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:23:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:23:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 20:23:19,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-21 20:23:19,431 INFO L175 Difference]: Start difference. First operand has 389 places, 632 transitions, 9938 flow. Second operand 9 states and 146 transitions. [2024-06-21 20:23:19,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 683 transitions, 11752 flow [2024-06-21 20:23:23,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 683 transitions, 11433 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:23:23,031 INFO L231 Difference]: Finished difference. Result has 394 places, 657 transitions, 10192 flow [2024-06-21 20:23:23,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9632, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10192, PETRI_PLACES=394, PETRI_TRANSITIONS=657} [2024-06-21 20:23:23,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-21 20:23:23,031 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 657 transitions, 10192 flow [2024-06-21 20:23:23,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:23,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:23,032 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 20:23:23,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:23:23,032 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 20:23:23,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1872109705, now seen corresponding path program 4 times [2024-06-21 20:23:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:23,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783064636] [2024-06-21 20:23:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:23,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:23,845 INFO 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 20:23:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:23,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783064636] [2024-06-21 20:23:23,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783064636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:23,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:23,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:23:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646767643] [2024-06-21 20:23:23,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:23,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:23:23,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:23:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:23:23,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:23:23,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 657 transitions, 10192 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:23,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:23,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:23:23,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:26,803 INFO L124 PetriNetUnfolderBase]: 7088/10698 cut-off events. [2024-06-21 20:23:26,804 INFO L125 PetriNetUnfolderBase]: For 1430482/1430482 co-relation queries the response was YES. [2024-06-21 20:23:26,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99975 conditions, 10698 events. 7088/10698 cut-off events. For 1430482/1430482 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63378 event pairs, 2253 based on Foata normal form. 4/10700 useless extension candidates. Maximal degree in co-relation 99786. Up to 10539 conditions per place. [2024-06-21 20:23:26,985 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 658 selfloop transitions, 26 changer transitions 0/687 dead transitions. [2024-06-21 20:23:26,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 687 transitions, 11694 flow [2024-06-21 20:23:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:23:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:23:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 20:23:26,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-21 20:23:26,987 INFO L175 Difference]: Start difference. First operand has 394 places, 657 transitions, 10192 flow. Second operand 9 states and 142 transitions. [2024-06-21 20:23:26,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 687 transitions, 11694 flow [2024-06-21 20:23:31,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 687 transitions, 11470 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:31,888 INFO L231 Difference]: Finished difference. Result has 399 places, 659 transitions, 10051 flow [2024-06-21 20:23:31,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9968, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10051, PETRI_PLACES=399, PETRI_TRANSITIONS=659} [2024-06-21 20:23:31,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-21 20:23:31,889 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 659 transitions, 10051 flow [2024-06-21 20:23:31,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:31,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:31,889 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 20:23:31,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:23:31,890 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 20:23:31,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:31,890 INFO L85 PathProgramCache]: Analyzing trace with hash -274903535, now seen corresponding path program 5 times [2024-06-21 20:23:31,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:31,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957553278] [2024-06-21 20:23:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:31,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:32,871 INFO 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 20:23:32,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:32,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957553278] [2024-06-21 20:23:32,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957553278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:32,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:32,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:23:32,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735732928] [2024-06-21 20:23:32,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:23:32,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:23:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:23:32,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:23:32,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 659 transitions, 10051 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:32,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:32,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:23:32,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:36,297 INFO L124 PetriNetUnfolderBase]: 7118/10740 cut-off events. [2024-06-21 20:23:36,297 INFO L125 PetriNetUnfolderBase]: For 1471537/1471537 co-relation queries the response was YES. [2024-06-21 20:23:36,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100183 conditions, 10740 events. 7118/10740 cut-off events. For 1471537/1471537 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63598 event pairs, 2258 based on Foata normal form. 8/10746 useless extension candidates. Maximal degree in co-relation 99992. Up to 10476 conditions per place. [2024-06-21 20:23:36,459 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 651 selfloop transitions, 39 changer transitions 0/693 dead transitions. [2024-06-21 20:23:36,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 693 transitions, 11895 flow [2024-06-21 20:23:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:23:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:23:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 20:23:36,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-21 20:23:36,461 INFO L175 Difference]: Start difference. First operand has 399 places, 659 transitions, 10051 flow. Second operand 9 states and 144 transitions. [2024-06-21 20:23:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 693 transitions, 11895 flow [2024-06-21 20:23:40,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 693 transitions, 11809 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:23:40,679 INFO L231 Difference]: Finished difference. Result has 402 places, 665 transitions, 10209 flow [2024-06-21 20:23:40,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9965, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10209, PETRI_PLACES=402, PETRI_TRANSITIONS=665} [2024-06-21 20:23:40,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-21 20:23:40,679 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 665 transitions, 10209 flow [2024-06-21 20:23:40,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:40,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:40,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:23:40,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:23:40,680 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 20:23:40,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1855250093, now seen corresponding path program 6 times [2024-06-21 20:23:40,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:40,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985067582] [2024-06-21 20:23:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:40,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:41,414 INFO 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 20:23:41,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:41,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985067582] [2024-06-21 20:23:41,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985067582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:41,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:41,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:23:41,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601926915] [2024-06-21 20:23:41,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:41,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:23:41,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:23:41,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:23:41,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:23:41,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 665 transitions, 10209 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:41,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:41,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:23:41,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:44,794 INFO L124 PetriNetUnfolderBase]: 7158/10784 cut-off events. [2024-06-21 20:23:44,794 INFO L125 PetriNetUnfolderBase]: For 1504647/1504651 co-relation queries the response was YES. [2024-06-21 20:23:44,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101691 conditions, 10784 events. 7158/10784 cut-off events. For 1504647/1504651 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 63606 event pairs, 1907 based on Foata normal form. 12/10792 useless extension candidates. Maximal degree in co-relation 101499. Up to 10287 conditions per place. [2024-06-21 20:23:44,946 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 617 selfloop transitions, 75 changer transitions 0/695 dead transitions. [2024-06-21 20:23:44,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 695 transitions, 11908 flow [2024-06-21 20:23:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:23:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:23:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 20:23:44,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 20:23:44,947 INFO L175 Difference]: Start difference. First operand has 402 places, 665 transitions, 10209 flow. Second operand 8 states and 134 transitions. [2024-06-21 20:23:44,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 695 transitions, 11908 flow [2024-06-21 20:23:49,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 695 transitions, 11677 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 20:23:49,035 INFO L231 Difference]: Finished difference. Result has 403 places, 672 transitions, 10373 flow [2024-06-21 20:23:49,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9978, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10373, PETRI_PLACES=403, PETRI_TRANSITIONS=672} [2024-06-21 20:23:49,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-21 20:23:49,035 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 672 transitions, 10373 flow [2024-06-21 20:23:49,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:49,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:49,036 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 20:23:49,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:23:49,036 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 20:23:49,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash 600233687, now seen corresponding path program 7 times [2024-06-21 20:23:49,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:49,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023566643] [2024-06-21 20:23:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:49,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:49,886 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 20:23:49,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023566643] [2024-06-21 20:23:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023566643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:49,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:49,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:23:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268221059] [2024-06-21 20:23:49,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:23:49,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:23:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:23:49,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:23:49,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 672 transitions, 10373 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:49,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:49,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:23:49,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:53,268 INFO L124 PetriNetUnfolderBase]: 7146/10769 cut-off events. [2024-06-21 20:23:53,268 INFO L125 PetriNetUnfolderBase]: For 1495067/1495074 co-relation queries the response was YES. [2024-06-21 20:23:53,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101695 conditions, 10769 events. 7146/10769 cut-off events. For 1495067/1495074 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 63588 event pairs, 1899 based on Foata normal form. 8/10772 useless extension candidates. Maximal degree in co-relation 101503. Up to 10253 conditions per place. [2024-06-21 20:23:53,425 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 616 selfloop transitions, 75 changer transitions 0/694 dead transitions. [2024-06-21 20:23:53,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 694 transitions, 11851 flow [2024-06-21 20:23:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:23:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:23:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 20:23:53,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 20:23:53,426 INFO L175 Difference]: Start difference. First operand has 403 places, 672 transitions, 10373 flow. Second operand 8 states and 134 transitions. [2024-06-21 20:23:53,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 694 transitions, 11851 flow [2024-06-21 20:23:57,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 694 transitions, 11497 flow, removed 126 selfloop flow, removed 4 redundant places. [2024-06-21 20:23:57,135 INFO L231 Difference]: Finished difference. Result has 407 places, 672 transitions, 10175 flow [2024-06-21 20:23:57,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10019, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10175, PETRI_PLACES=407, PETRI_TRANSITIONS=672} [2024-06-21 20:23:57,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-21 20:23:57,136 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 672 transitions, 10175 flow [2024-06-21 20:23:57,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:57,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:57,136 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 20:23:57,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:23:57,136 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 20:23:57,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash 153476745, now seen corresponding path program 8 times [2024-06-21 20:23:57,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:57,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104102830] [2024-06-21 20:23:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:57,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:57,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:57,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104102830] [2024-06-21 20:23:57,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104102830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:57,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:57,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:23:57,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252585494] [2024-06-21 20:23:57,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:57,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:23:57,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:57,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:23:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:23:57,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:23:57,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 672 transitions, 10175 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:23:57,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:57,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:23:57,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:01,353 INFO L124 PetriNetUnfolderBase]: 7314/11001 cut-off events. [2024-06-21 20:24:01,353 INFO L125 PetriNetUnfolderBase]: For 1636109/1636116 co-relation queries the response was YES. [2024-06-21 20:24:01,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105729 conditions, 11001 events. 7314/11001 cut-off events. For 1636109/1636116 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 65055 event pairs, 1886 based on Foata normal form. 12/11008 useless extension candidates. Maximal degree in co-relation 105536. Up to 9785 conditions per place. [2024-06-21 20:24:01,526 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 562 selfloop transitions, 143 changer transitions 0/708 dead transitions. [2024-06-21 20:24:01,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 708 transitions, 12533 flow [2024-06-21 20:24:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:24:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:24:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:24:01,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 20:24:01,527 INFO L175 Difference]: Start difference. First operand has 407 places, 672 transitions, 10175 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:24:01,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 708 transitions, 12533 flow [2024-06-21 20:24:06,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 708 transitions, 12357 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:24:06,234 INFO L231 Difference]: Finished difference. Result has 410 places, 683 transitions, 10717 flow [2024-06-21 20:24:06,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9999, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10717, PETRI_PLACES=410, PETRI_TRANSITIONS=683} [2024-06-21 20:24:06,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-21 20:24:06,235 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 683 transitions, 10717 flow [2024-06-21 20:24:06,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 20:24:06,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:06,235 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 20:24:06,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:24:06,235 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 20:24:06,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash -270128539, now seen corresponding path program 9 times [2024-06-21 20:24:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:06,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767990016] [2024-06-21 20:24:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:07,185 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 20:24:07,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:07,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767990016] [2024-06-21 20:24:07,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767990016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:07,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:07,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:24:07,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023015706] [2024-06-21 20:24:07,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:07,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:24:07,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:24:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:24:07,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:24:07,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 683 transitions, 10717 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:07,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:07,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:24:07,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:10,966 INFO L124 PetriNetUnfolderBase]: 7354/11068 cut-off events. [2024-06-21 20:24:10,966 INFO L125 PetriNetUnfolderBase]: For 1671312/1671312 co-relation queries the response was YES. [2024-06-21 20:24:11,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107762 conditions, 11068 events. 7354/11068 cut-off events. For 1671312/1671312 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 65715 event pairs, 2267 based on Foata normal form. 8/11074 useless extension candidates. Maximal degree in co-relation 107567. Up to 10867 conditions per place. [2024-06-21 20:24:11,142 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 669 selfloop transitions, 40 changer transitions 0/712 dead transitions. [2024-06-21 20:24:11,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 712 transitions, 12646 flow [2024-06-21 20:24:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:24:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:24:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 20:24:11,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-21 20:24:11,144 INFO L175 Difference]: Start difference. First operand has 410 places, 683 transitions, 10717 flow. Second operand 9 states and 140 transitions. [2024-06-21 20:24:11,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 712 transitions, 12646 flow [2024-06-21 20:24:16,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 712 transitions, 12356 flow, removed 112 selfloop flow, removed 3 redundant places. [2024-06-21 20:24:16,347 INFO L231 Difference]: Finished difference. Result has 417 places, 689 transitions, 10752 flow [2024-06-21 20:24:16,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10467, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10752, PETRI_PLACES=417, PETRI_TRANSITIONS=689} [2024-06-21 20:24:16,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-21 20:24:16,348 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 689 transitions, 10752 flow [2024-06-21 20:24:16,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:16,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:16,348 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 20:24:16,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:24:16,348 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 20:24:16,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash -51818161, now seen corresponding path program 7 times [2024-06-21 20:24:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:16,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483641175] [2024-06-21 20:24:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:17,069 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 20:24:17,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:17,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483641175] [2024-06-21 20:24:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483641175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:17,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:17,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:24:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083381229] [2024-06-21 20:24:17,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:17,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:24:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:17,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:24:17,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:24:17,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-21 20:24:17,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 689 transitions, 10752 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:17,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:17,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-21 20:24:17,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:20,630 INFO L124 PetriNetUnfolderBase]: 7374/11087 cut-off events. [2024-06-21 20:24:20,630 INFO L125 PetriNetUnfolderBase]: For 1664126/1664129 co-relation queries the response was YES. [2024-06-21 20:24:20,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107310 conditions, 11087 events. 7374/11087 cut-off events. For 1664126/1664129 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 65537 event pairs, 1491 based on Foata normal form. 4/11084 useless extension candidates. Maximal degree in co-relation 107112. Up to 10240 conditions per place. [2024-06-21 20:24:20,817 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 581 selfloop transitions, 133 changer transitions 0/717 dead transitions. [2024-06-21 20:24:20,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 717 transitions, 12375 flow [2024-06-21 20:24:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:24:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:24:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 20:24:20,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 20:24:20,819 INFO L175 Difference]: Start difference. First operand has 417 places, 689 transitions, 10752 flow. Second operand 8 states and 136 transitions. [2024-06-21 20:24:20,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 717 transitions, 12375 flow