./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe000_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe000_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:11:00,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:11:00,528 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:11:00,531 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:11:00,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:11:00,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:11:00,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:11:00,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:11:00,548 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:11:00,551 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:11:00,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:11:00,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:11:00,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:11:00,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:11:00,554 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:11:00,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:11:00,554 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:11:00,554 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:11:00,555 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:11:00,555 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:11:00,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:11:00,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:11:00,556 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:11:00,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:11:00,556 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:11:00,556 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:11:00,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:11:00,557 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:11:00,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:11:00,558 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:11:00,558 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:11:00,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:11:00,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:11:00,559 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:11:00,559 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:11:00,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:11:00,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:11:00,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:11:00,560 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:11:00,560 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:11:00,560 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:11:00,560 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:11:00,561 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:11:00,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:11:00,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:11:00,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:11:00,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:11:00,794 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:11:00,795 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:11:00,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i [2024-06-21 17:11:01,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:11:02,080 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:11:02,081 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i [2024-06-21 17:11:02,125 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07262e9fc/1c48c3a26bc14fc8aa205df9cf34cdb7/FLAGac973db30 [2024-06-21 17:11:02,139 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07262e9fc/1c48c3a26bc14fc8aa205df9cf34cdb7 [2024-06-21 17:11:02,141 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:11:02,142 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:11:02,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe000_power.oepc.yml/witness.yml [2024-06-21 17:11:02,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:11:02,338 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:11:02,339 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:11:02,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:11:02,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:11:02,347 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:11:02" (1/2) ... [2024-06-21 17:11:02,348 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26295d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:11:02, skipping insertion in model container [2024-06-21 17:11:02,348 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:11:02" (1/2) ... [2024-06-21 17:11:02,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d84fa63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:11:02, skipping insertion in model container [2024-06-21 17:11:02,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:11:02" (2/2) ... [2024-06-21 17:11:02,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26295d6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:02, skipping insertion in model container [2024-06-21 17:11:02,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:11:02" (2/2) ... [2024-06-21 17:11:02,350 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:11:02,466 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:11:02,467 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 17:11:02,467 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 17:11:02,467 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 17:11:02,467 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:11:02,468 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 17:11:02,510 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:11:02,866 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:11:02,881 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:11:02,980 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:11:03,010 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:11:03,012 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03 WrapperNode [2024-06-21 17:11:03,012 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:11:03,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:11:03,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:11:03,014 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:11:03,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,089 INFO L138 Inliner]: procedures = 175, calls = 91, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 225 [2024-06-21 17:11:03,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:11:03,092 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:11:03,092 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:11:03,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:11:03,101 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,114 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,145 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 17:11:03,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:11:03,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:11:03,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:11:03,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:11:03,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (1/1) ... [2024-06-21 17:11:03,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:11:03,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:11:03,243 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 17:11:03,280 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 17:11:03,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:11:03,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:11:03,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:11:03,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:11:03,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:11:03,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:11:03,299 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:11:03,299 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:11:03,299 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:11:03,299 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:11:03,299 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:11:03,300 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:11:03,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:11:03,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:11:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:11:03,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:11:03,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:11:03,303 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 17:11:03,421 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:11:03,423 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:11:03,900 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:11:03,900 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:11:04,272 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:11:04,273 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:11:04,273 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:11:04 BoogieIcfgContainer [2024-06-21 17:11:04,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:11:04,275 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:11:04,275 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:11:04,278 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:11:04,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:11:02" (1/4) ... [2024-06-21 17:11:04,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1854ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:11:04, skipping insertion in model container [2024-06-21 17:11:04,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:11:02" (2/4) ... [2024-06-21 17:11:04,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1854ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:11:04, skipping insertion in model container [2024-06-21 17:11:04,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:11:03" (3/4) ... [2024-06-21 17:11:04,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1854ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:11:04, skipping insertion in model container [2024-06-21 17:11:04,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:11:04" (4/4) ... [2024-06-21 17:11:04,280 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_power.oepc.i [2024-06-21 17:11:04,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:11:04,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:11:04,294 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:11:04,361 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:11:04,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:11:04,415 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 17:11:04,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:11:04,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:11:04,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:11:04,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 17:11:04,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:11:04,454 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;@23dd99f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:11:04,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:11:04,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:11:04,479 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:11:04,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:11:04,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:04,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:11:04,481 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 17:11:04,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash 887438332, now seen corresponding path program 1 times [2024-06-21 17:11:04,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:04,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373681583] [2024-06-21 17:11:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:04,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:06,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373681583] [2024-06-21 17:11:06,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373681583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:06,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:06,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:11:06,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724193829] [2024-06-21 17:11:06,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:06,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:11:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:11:06,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:11:06,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:11:06,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:06,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:06,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:11:06,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:06,979 INFO L124 PetriNetUnfolderBase]: 1157/1772 cut-off events. [2024-06-21 17:11:06,979 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 17:11:06,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1772 events. 1157/1772 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8374 event pairs, 709 based on Foata normal form. 2/1743 useless extension candidates. Maximal degree in co-relation 3581. Up to 1741 conditions per place. [2024-06-21 17:11:06,991 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 17:11:06,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-21 17:11:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:11:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:11:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-21 17:11:07,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 17:11:07,001 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-21 17:11:07,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-21 17:11:07,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:07,004 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 17:11:07,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 17:11:07,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 17:11:07,008 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 17:11:07,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:07,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:07,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:07,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:11:07,009 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 17:11:07,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1870217157, now seen corresponding path program 1 times [2024-06-21 17:11:07,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:07,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045062444] [2024-06-21 17:11:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:09,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045062444] [2024-06-21 17:11:09,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045062444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:09,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:09,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:11:09,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576343358] [2024-06-21 17:11:09,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:09,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:11:09,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:11:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:11:09,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:11:09,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:09,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:09,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:11:09,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:10,029 INFO L124 PetriNetUnfolderBase]: 1148/1758 cut-off events. [2024-06-21 17:11:10,030 INFO L125 PetriNetUnfolderBase]: For 327/330 co-relation queries the response was YES. [2024-06-21 17:11:10,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1758 events. 1148/1758 cut-off events. For 327/330 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8278 event pairs, 585 based on Foata normal form. 6/1762 useless extension candidates. Maximal degree in co-relation 4046. Up to 1704 conditions per place. [2024-06-21 17:11:10,039 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 17:11:10,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-21 17:11:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:11:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:11:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 17:11:10,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 17:11:10,041 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-21 17:11:10,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-21 17:11:10,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:11:10,043 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 17:11:10,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 17:11:10,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 17:11:10,044 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 17:11:10,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:10,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:10,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:10,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:11:10,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:10,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2142155780, now seen corresponding path program 1 times [2024-06-21 17:11:10,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:10,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787566890] [2024-06-21 17:11:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:10,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:12,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787566890] [2024-06-21 17:11:12,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787566890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:12,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:12,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:11:12,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040827533] [2024-06-21 17:11:12,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:12,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:11:12,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:12,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:11:12,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:11:12,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:12,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:12,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:12,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:12,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:13,421 INFO L124 PetriNetUnfolderBase]: 1375/2089 cut-off events. [2024-06-21 17:11:13,421 INFO L125 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2024-06-21 17:11:13,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5347 conditions, 2089 events. 1375/2089 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9824 event pairs, 547 based on Foata normal form. 4/2092 useless extension candidates. Maximal degree in co-relation 5333. Up to 2012 conditions per place. [2024-06-21 17:11:13,430 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-21 17:11:13,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 395 flow [2024-06-21 17:11:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:11:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:11:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 17:11:13,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 17:11:13,432 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 110 transitions. [2024-06-21 17:11:13,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 395 flow [2024-06-21 17:11:13,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 374 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:11:13,434 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 208 flow [2024-06-21 17:11:13,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-21 17:11:13,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 17:11:13,435 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 208 flow [2024-06-21 17:11:13,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:13,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:13,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:13,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:11:13,436 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 17:11:13,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 391257413, now seen corresponding path program 1 times [2024-06-21 17:11:13,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:13,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912781936] [2024-06-21 17:11:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:13,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:16,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:16,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912781936] [2024-06-21 17:11:16,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912781936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:16,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:16,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:11:16,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135482084] [2024-06-21 17:11:16,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:16,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:11:16,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:16,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:11:16,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:11:16,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:16,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:16,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:16,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:16,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:17,256 INFO L124 PetriNetUnfolderBase]: 1361/2067 cut-off events. [2024-06-21 17:11:17,256 INFO L125 PetriNetUnfolderBase]: For 1822/1822 co-relation queries the response was YES. [2024-06-21 17:11:17,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 2067 events. 1361/2067 cut-off events. For 1822/1822 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9742 event pairs, 384 based on Foata normal form. 8/2074 useless extension candidates. Maximal degree in co-relation 5830. Up to 1942 conditions per place. [2024-06-21 17:11:17,266 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-21 17:11:17,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 462 flow [2024-06-21 17:11:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:11:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:11:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 17:11:17,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:11:17,270 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 208 flow. Second operand 6 states and 126 transitions. [2024-06-21 17:11:17,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 462 flow [2024-06-21 17:11:17,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 458 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 17:11:17,275 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-21 17:11:17,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=196, 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=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 17:11:17,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 17:11:17,276 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-21 17:11:17,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:17,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:17,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:17,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:11:17,278 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 17:11:17,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash -920562115, now seen corresponding path program 1 times [2024-06-21 17:11:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:17,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299817736] [2024-06-21 17:11:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:18,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:18,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299817736] [2024-06-21 17:11:18,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299817736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:18,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:18,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:11:18,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868607997] [2024-06-21 17:11:18,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:18,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:11:18,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:18,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:11:18,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:11:18,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:18,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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 17:11:18,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:18,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:18,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:19,744 INFO L124 PetriNetUnfolderBase]: 1351/2052 cut-off events. [2024-06-21 17:11:19,745 INFO L125 PetriNetUnfolderBase]: For 2816/2816 co-relation queries the response was YES. [2024-06-21 17:11:19,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 2052 events. 1351/2052 cut-off events. For 2816/2816 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9420 event pairs, 554 based on Foata normal form. 4/2055 useless extension candidates. Maximal degree in co-relation 6201. Up to 1994 conditions per place. [2024-06-21 17:11:19,792 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-21 17:11:19,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 456 flow [2024-06-21 17:11:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:11:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:11:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 17:11:19,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:11:19,796 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 5 states and 87 transitions. [2024-06-21 17:11:19,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 456 flow [2024-06-21 17:11:19,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 423 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:11:19,805 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 289 flow [2024-06-21 17:11:19,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-21 17:11:19,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 17:11:19,807 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 289 flow [2024-06-21 17:11:19,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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 17:11:19,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:19,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:19,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:11:19,808 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 17:11:19,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash 96459160, now seen corresponding path program 1 times [2024-06-21 17:11:19,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:19,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661078260] [2024-06-21 17:11:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:22,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:22,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661078260] [2024-06-21 17:11:22,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661078260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:22,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:22,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:22,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425505130] [2024-06-21 17:11:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:22,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:22,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:22,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 289 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 17:11:22,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:22,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:22,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:24,156 INFO L124 PetriNetUnfolderBase]: 1369/2088 cut-off events. [2024-06-21 17:11:24,156 INFO L125 PetriNetUnfolderBase]: For 3831/3833 co-relation queries the response was YES. [2024-06-21 17:11:24,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6788 conditions, 2088 events. 1369/2088 cut-off events. For 3831/3833 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9812 event pairs, 494 based on Foata normal form. 5/2092 useless extension candidates. Maximal degree in co-relation 6764. Up to 1926 conditions per place. [2024-06-21 17:11:24,166 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-21 17:11:24,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 633 flow [2024-06-21 17:11:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 17:11:24,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 17:11:24,169 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 289 flow. Second operand 7 states and 132 transitions. [2024-06-21 17:11:24,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 633 flow [2024-06-21 17:11:24,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 629 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 17:11:24,172 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 387 flow [2024-06-21 17:11:24,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-21 17:11:24,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 17:11:24,175 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 387 flow [2024-06-21 17:11:24,175 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 17:11:24,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:24,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:24,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:11:24,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:24,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash -74238434, now seen corresponding path program 1 times [2024-06-21 17:11:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:24,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361841387] [2024-06-21 17:11:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:24,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:27,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:27,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361841387] [2024-06-21 17:11:27,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361841387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:27,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:27,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:27,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703815805] [2024-06-21 17:11:27,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:27,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:27,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:27,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:27,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 387 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 17:11:27,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:27,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:27,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:28,569 INFO L124 PetriNetUnfolderBase]: 1615/2434 cut-off events. [2024-06-21 17:11:28,570 INFO L125 PetriNetUnfolderBase]: For 6160/6162 co-relation queries the response was YES. [2024-06-21 17:11:28,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8482 conditions, 2434 events. 1615/2434 cut-off events. For 6160/6162 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11445 event pairs, 510 based on Foata normal form. 12/2445 useless extension candidates. Maximal degree in co-relation 8455. Up to 2148 conditions per place. [2024-06-21 17:11:28,595 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 89 selfloop transitions, 33 changer transitions 0/126 dead transitions. [2024-06-21 17:11:28,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 126 transitions, 881 flow [2024-06-21 17:11:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:11:28,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 17:11:28,597 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 387 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:11:28,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 126 transitions, 881 flow [2024-06-21 17:11:28,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 844 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:28,603 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 544 flow [2024-06-21 17:11:28,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-21 17:11:28,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-21 17:11:28,603 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 544 flow [2024-06-21 17:11:28,604 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 17:11:28,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:28,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:28,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:11:28,604 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 17:11:28,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash -74238620, now seen corresponding path program 2 times [2024-06-21 17:11:28,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:28,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548555505] [2024-06-21 17:11:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:28,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:31,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:31,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548555505] [2024-06-21 17:11:31,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548555505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:31,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:31,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368983588] [2024-06-21 17:11:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:31,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:31,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:31,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 544 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 17:11:31,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:31,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:31,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:32,426 INFO L124 PetriNetUnfolderBase]: 1633/2468 cut-off events. [2024-06-21 17:11:32,426 INFO L125 PetriNetUnfolderBase]: For 8744/8746 co-relation queries the response was YES. [2024-06-21 17:11:32,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9898 conditions, 2468 events. 1633/2468 cut-off events. For 8744/8746 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11691 event pairs, 523 based on Foata normal form. 5/2472 useless extension candidates. Maximal degree in co-relation 9867. Up to 2334 conditions per place. [2024-06-21 17:11:32,440 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 22 changer transitions 0/113 dead transitions. [2024-06-21 17:11:32,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 880 flow [2024-06-21 17:11:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:11:32,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 17:11:32,445 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 544 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:11:32,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 880 flow [2024-06-21 17:11:32,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 831 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:32,454 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 579 flow [2024-06-21 17:11:32,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-21 17:11:32,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 17:11:32,455 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 579 flow [2024-06-21 17:11:32,455 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 17:11:32,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:32,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:32,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:11:32,455 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 17:11:32,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash 278911762, now seen corresponding path program 3 times [2024-06-21 17:11:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:32,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732464815] [2024-06-21 17:11:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:34,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:34,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732464815] [2024-06-21 17:11:34,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732464815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:34,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:34,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:34,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098293454] [2024-06-21 17:11:34,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:34,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:34,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:34,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 579 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 17:11:34,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:34,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:34,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:36,142 INFO L124 PetriNetUnfolderBase]: 1625/2457 cut-off events. [2024-06-21 17:11:36,142 INFO L125 PetriNetUnfolderBase]: For 10139/10141 co-relation queries the response was YES. [2024-06-21 17:11:36,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10066 conditions, 2457 events. 1625/2457 cut-off events. For 10139/10141 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11626 event pairs, 525 based on Foata normal form. 5/2461 useless extension candidates. Maximal degree in co-relation 10033. Up to 2283 conditions per place. [2024-06-21 17:11:36,156 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 80 selfloop transitions, 27 changer transitions 0/111 dead transitions. [2024-06-21 17:11:36,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 875 flow [2024-06-21 17:11:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:11:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:11:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 17:11:36,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:11:36,159 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 579 flow. Second operand 6 states and 114 transitions. [2024-06-21 17:11:36,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 875 flow [2024-06-21 17:11:36,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 811 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:36,199 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 585 flow [2024-06-21 17:11:36,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-21 17:11:36,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 17:11:36,200 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 585 flow [2024-06-21 17:11:36,200 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 17:11:36,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:36,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:36,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:11:36,201 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 17:11:36,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:36,201 INFO L85 PathProgramCache]: Analyzing trace with hash -952887574, now seen corresponding path program 2 times [2024-06-21 17:11:36,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:36,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553968051] [2024-06-21 17:11:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:38,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:38,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553968051] [2024-06-21 17:11:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553968051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:38,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:38,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:38,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454404209] [2024-06-21 17:11:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:38,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:38,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:38,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:38,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:38,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 585 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 17:11:38,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:38,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:38,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:39,494 INFO L124 PetriNetUnfolderBase]: 1615/2441 cut-off events. [2024-06-21 17:11:39,495 INFO L125 PetriNetUnfolderBase]: For 11840/11850 co-relation queries the response was YES. [2024-06-21 17:11:39,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 2441 events. 1615/2441 cut-off events. For 11840/11850 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11406 event pairs, 552 based on Foata normal form. 14/2454 useless extension candidates. Maximal degree in co-relation 10195. Up to 2248 conditions per place. [2024-06-21 17:11:39,506 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2024-06-21 17:11:39,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 120 transitions, 1024 flow [2024-06-21 17:11:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:11:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:11:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:11:39,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-21 17:11:39,508 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 585 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:11:39,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 120 transitions, 1024 flow [2024-06-21 17:11:39,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 120 transitions, 952 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:39,516 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 719 flow [2024-06-21 17:11:39,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=719, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-21 17:11:39,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 17:11:39,517 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 719 flow [2024-06-21 17:11:39,517 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 17:11:39,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:39,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:39,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:11:39,518 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 17:11:39,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash -937700674, now seen corresponding path program 3 times [2024-06-21 17:11:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:39,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846776881] [2024-06-21 17:11:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:41,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:41,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846776881] [2024-06-21 17:11:41,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846776881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:41,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:41,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:41,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659670875] [2024-06-21 17:11:41,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:41,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:41,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:41,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:41,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:41,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 719 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 17:11:41,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:41,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:41,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:42,812 INFO L124 PetriNetUnfolderBase]: 1627/2455 cut-off events. [2024-06-21 17:11:42,812 INFO L125 PetriNetUnfolderBase]: For 12330/12332 co-relation queries the response was YES. [2024-06-21 17:11:42,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 2455 events. 1627/2455 cut-off events. For 12330/12332 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11446 event pairs, 557 based on Foata normal form. 12/2466 useless extension candidates. Maximal degree in co-relation 10685. Up to 2162 conditions per place. [2024-06-21 17:11:42,823 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-21 17:11:42,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 129 transitions, 1102 flow [2024-06-21 17:11:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:11:42,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 17:11:42,825 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 719 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:11:42,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 129 transitions, 1102 flow [2024-06-21 17:11:42,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 1078 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-21 17:11:42,836 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 873 flow [2024-06-21 17:11:42,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=873, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-06-21 17:11:42,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 17:11:42,836 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 873 flow [2024-06-21 17:11:42,837 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 17:11:42,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:42,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:42,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:11:42,837 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 17:11:42,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:42,837 INFO L85 PathProgramCache]: Analyzing trace with hash -952648006, now seen corresponding path program 1 times [2024-06-21 17:11:42,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:42,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072911829] [2024-06-21 17:11:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:42,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:45,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:45,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072911829] [2024-06-21 17:11:45,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072911829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:45,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:45,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:45,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708913502] [2024-06-21 17:11:45,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:45,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:45,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:45,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:45,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:45,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 873 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 17:11:45,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:45,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:45,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:46,294 INFO L124 PetriNetUnfolderBase]: 1619/2443 cut-off events. [2024-06-21 17:11:46,294 INFO L125 PetriNetUnfolderBase]: For 14529/14531 co-relation queries the response was YES. [2024-06-21 17:11:46,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11330 conditions, 2443 events. 1619/2443 cut-off events. For 14529/14531 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11341 event pairs, 532 based on Foata normal form. 6/2448 useless extension candidates. Maximal degree in co-relation 11289. Up to 2351 conditions per place. [2024-06-21 17:11:46,308 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-21 17:11:46,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1182 flow [2024-06-21 17:11:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:11:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:11:46,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:11:46,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:11:46,313 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 873 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:11:46,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1182 flow [2024-06-21 17:11:46,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1101 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 17:11:46,329 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 839 flow [2024-06-21 17:11:46,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=839, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-21 17:11:46,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 17:11:46,330 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 839 flow [2024-06-21 17:11:46,330 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 17:11:46,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:46,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:46,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:11:46,331 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 17:11:46,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:46,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1187452637, now seen corresponding path program 1 times [2024-06-21 17:11:46,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:46,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763593623] [2024-06-21 17:11:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:46,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:49,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:49,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763593623] [2024-06-21 17:11:49,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763593623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:49,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:49,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:49,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638995752] [2024-06-21 17:11:49,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:49,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:49,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:49,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 839 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 17:11:49,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:49,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:49,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:50,717 INFO L124 PetriNetUnfolderBase]: 1847/2783 cut-off events. [2024-06-21 17:11:50,718 INFO L125 PetriNetUnfolderBase]: For 18274/18276 co-relation queries the response was YES. [2024-06-21 17:11:50,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12722 conditions, 2783 events. 1847/2783 cut-off events. For 18274/18276 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13256 event pairs, 547 based on Foata normal form. 12/2794 useless extension candidates. Maximal degree in co-relation 12680. Up to 2114 conditions per place. [2024-06-21 17:11:50,732 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 109 selfloop transitions, 67 changer transitions 0/180 dead transitions. [2024-06-21 17:11:50,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 180 transitions, 1573 flow [2024-06-21 17:11:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:11:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:11:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 17:11:50,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:11:50,734 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 839 flow. Second operand 11 states and 209 transitions. [2024-06-21 17:11:50,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 180 transitions, 1573 flow [2024-06-21 17:11:50,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 180 transitions, 1544 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:11:50,749 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 1102 flow [2024-06-21 17:11:50,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1102, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2024-06-21 17:11:50,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 17:11:50,750 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 1102 flow [2024-06-21 17:11:50,750 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 17:11:50,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:50,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:50,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:11:50,751 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 17:11:50,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:50,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1304587071, now seen corresponding path program 2 times [2024-06-21 17:11:50,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:50,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511533570] [2024-06-21 17:11:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:50,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:53,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:53,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511533570] [2024-06-21 17:11:53,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511533570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:53,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:53,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:53,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610768604] [2024-06-21 17:11:53,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:53,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:53,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:53,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 1102 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 17:11:53,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:53,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:53,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:55,249 INFO L124 PetriNetUnfolderBase]: 2016/3050 cut-off events. [2024-06-21 17:11:55,249 INFO L125 PetriNetUnfolderBase]: For 25162/25164 co-relation queries the response was YES. [2024-06-21 17:11:55,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15509 conditions, 3050 events. 2016/3050 cut-off events. For 25162/25164 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14784 event pairs, 602 based on Foata normal form. 12/3061 useless extension candidates. Maximal degree in co-relation 15464. Up to 2531 conditions per place. [2024-06-21 17:11:55,265 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 127 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2024-06-21 17:11:55,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 187 transitions, 1870 flow [2024-06-21 17:11:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:11:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:11:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 17:11:55,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 17:11:55,267 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 1102 flow. Second operand 10 states and 193 transitions. [2024-06-21 17:11:55,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 187 transitions, 1870 flow [2024-06-21 17:11:55,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 187 transitions, 1723 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:55,293 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 1254 flow [2024-06-21 17:11:55,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1254, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-06-21 17:11:55,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 17:11:55,293 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 1254 flow [2024-06-21 17:11:55,294 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 17:11:55,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:55,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:55,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:11:55,294 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:55,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1993577771, now seen corresponding path program 3 times [2024-06-21 17:11:55,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:55,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290161651] [2024-06-21 17:11:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:55,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:58,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290161651] [2024-06-21 17:11:58,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290161651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:58,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:58,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906947456] [2024-06-21 17:11:58,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:58,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:58,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:58,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:11:58,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 1254 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 17:11:58,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:58,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:11:58,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:00,053 INFO L124 PetriNetUnfolderBase]: 2028/3076 cut-off events. [2024-06-21 17:12:00,054 INFO L125 PetriNetUnfolderBase]: For 28472/28474 co-relation queries the response was YES. [2024-06-21 17:12:00,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16244 conditions, 3076 events. 2028/3076 cut-off events. For 28472/28474 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15062 event pairs, 590 based on Foata normal form. 12/3087 useless extension candidates. Maximal degree in co-relation 16196. Up to 2544 conditions per place. [2024-06-21 17:12:00,074 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 133 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-21 17:12:00,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 199 transitions, 1938 flow [2024-06-21 17:12:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:12:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:12:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-21 17:12:00,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:12:00,077 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 1254 flow. Second operand 12 states and 224 transitions. [2024-06-21 17:12:00,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 199 transitions, 1938 flow [2024-06-21 17:12:00,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1845 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:00,121 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1350 flow [2024-06-21 17:12:00,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1350, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-21 17:12:00,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 17:12:00,123 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1350 flow [2024-06-21 17:12:00,123 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 17:12:00,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:00,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:00,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:12:00,124 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:00,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash 532408047, now seen corresponding path program 4 times [2024-06-21 17:12:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:00,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955793032] [2024-06-21 17:12:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:00,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:02,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:02,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955793032] [2024-06-21 17:12:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955793032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:02,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:02,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:02,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567045171] [2024-06-21 17:12:02,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:02,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:02,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:02,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:02,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:02,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:02,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1350 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 17:12:02,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:02,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:02,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:04,464 INFO L124 PetriNetUnfolderBase]: 2018/3078 cut-off events. [2024-06-21 17:12:04,464 INFO L125 PetriNetUnfolderBase]: For 31355/31376 co-relation queries the response was YES. [2024-06-21 17:12:04,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16744 conditions, 3078 events. 2018/3078 cut-off events. For 31355/31376 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15201 event pairs, 593 based on Foata normal form. 25/3102 useless extension candidates. Maximal degree in co-relation 16694. Up to 2664 conditions per place. [2024-06-21 17:12:04,485 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 42 changer transitions 0/195 dead transitions. [2024-06-21 17:12:04,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 195 transitions, 2095 flow [2024-06-21 17:12:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:12:04,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:12:04,489 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1350 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:12:04,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 195 transitions, 2095 flow [2024-06-21 17:12:04,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 195 transitions, 1921 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 17:12:04,523 INFO L231 Difference]: Finished difference. Result has 110 places, 149 transitions, 1513 flow [2024-06-21 17:12:04,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1513, PETRI_PLACES=110, PETRI_TRANSITIONS=149} [2024-06-21 17:12:04,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 17:12:04,524 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 149 transitions, 1513 flow [2024-06-21 17:12:04,524 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 17:12:04,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:04,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:04,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:12:04,524 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:04,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:04,525 INFO L85 PathProgramCache]: Analyzing trace with hash 56337725, now seen corresponding path program 5 times [2024-06-21 17:12:04,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:04,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312049207] [2024-06-21 17:12:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:04,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:07,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:07,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312049207] [2024-06-21 17:12:07,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312049207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:07,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:07,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:07,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122576979] [2024-06-21 17:12:07,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:07,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:07,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:07,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:07,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:07,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:07,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 149 transitions, 1513 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 17:12:07,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:07,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:07,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:08,823 INFO L124 PetriNetUnfolderBase]: 2230/3402 cut-off events. [2024-06-21 17:12:08,823 INFO L125 PetriNetUnfolderBase]: For 37520/37522 co-relation queries the response was YES. [2024-06-21 17:12:08,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18924 conditions, 3402 events. 2230/3402 cut-off events. For 37520/37522 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17193 event pairs, 596 based on Foata normal form. 12/3413 useless extension candidates. Maximal degree in co-relation 18871. Up to 2590 conditions per place. [2024-06-21 17:12:08,847 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 98 changer transitions 0/223 dead transitions. [2024-06-21 17:12:08,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 223 transitions, 2478 flow [2024-06-21 17:12:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:12:08,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 17:12:08,851 INFO L175 Difference]: Start difference. First operand has 110 places, 149 transitions, 1513 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:12:08,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 223 transitions, 2478 flow [2024-06-21 17:12:08,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 223 transitions, 2380 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:08,901 INFO L231 Difference]: Finished difference. Result has 116 places, 175 transitions, 2048 flow [2024-06-21 17:12:08,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2048, PETRI_PLACES=116, PETRI_TRANSITIONS=175} [2024-06-21 17:12:08,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 17:12:08,901 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 175 transitions, 2048 flow [2024-06-21 17:12:08,902 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 17:12:08,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:08,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:08,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:12:08,902 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:08,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:08,903 INFO L85 PathProgramCache]: Analyzing trace with hash 996046527, now seen corresponding path program 6 times [2024-06-21 17:12:08,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:08,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46538977] [2024-06-21 17:12:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:08,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:11,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:11,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46538977] [2024-06-21 17:12:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46538977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:11,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:11,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457986344] [2024-06-21 17:12:11,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:11,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:11,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:11,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:11,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 175 transitions, 2048 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 17:12:11,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:11,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:11,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:13,236 INFO L124 PetriNetUnfolderBase]: 2210/3386 cut-off events. [2024-06-21 17:12:13,237 INFO L125 PetriNetUnfolderBase]: For 42195/42197 co-relation queries the response was YES. [2024-06-21 17:12:13,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19869 conditions, 3386 events. 2210/3386 cut-off events. For 42195/42197 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17160 event pairs, 614 based on Foata normal form. 12/3397 useless extension candidates. Maximal degree in co-relation 19813. Up to 2579 conditions per place. [2024-06-21 17:12:13,257 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 128 selfloop transitions, 94 changer transitions 0/226 dead transitions. [2024-06-21 17:12:13,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 226 transitions, 2687 flow [2024-06-21 17:12:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 17:12:13,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 17:12:13,259 INFO L175 Difference]: Start difference. First operand has 116 places, 175 transitions, 2048 flow. Second operand 9 states and 177 transitions. [2024-06-21 17:12:13,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 226 transitions, 2687 flow [2024-06-21 17:12:13,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 226 transitions, 2554 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 17:12:13,328 INFO L231 Difference]: Finished difference. Result has 122 places, 176 transitions, 2169 flow [2024-06-21 17:12:13,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2169, PETRI_PLACES=122, PETRI_TRANSITIONS=176} [2024-06-21 17:12:13,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 17:12:13,328 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 176 transitions, 2169 flow [2024-06-21 17:12:13,329 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 17:12:13,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:13,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:13,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:12:13,329 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:13,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:13,329 INFO L85 PathProgramCache]: Analyzing trace with hash -167829681, now seen corresponding path program 1 times [2024-06-21 17:12:13,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:13,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837837864] [2024-06-21 17:12:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:13,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:16,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837837864] [2024-06-21 17:12:16,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837837864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:16,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:16,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:16,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372595086] [2024-06-21 17:12:16,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:16,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:16,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:16,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:16,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 176 transitions, 2169 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 17:12:16,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:16,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:16,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:17,629 INFO L124 PetriNetUnfolderBase]: 2238/3420 cut-off events. [2024-06-21 17:12:17,629 INFO L125 PetriNetUnfolderBase]: For 46569/46571 co-relation queries the response was YES. [2024-06-21 17:12:17,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20927 conditions, 3420 events. 2238/3420 cut-off events. For 46569/46571 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17391 event pairs, 493 based on Foata normal form. 8/3427 useless extension candidates. Maximal degree in co-relation 20868. Up to 2990 conditions per place. [2024-06-21 17:12:17,658 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 47 changer transitions 0/224 dead transitions. [2024-06-21 17:12:17,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 224 transitions, 2903 flow [2024-06-21 17:12:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:12:17,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 17:12:17,660 INFO L175 Difference]: Start difference. First operand has 122 places, 176 transitions, 2169 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:12:17,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 224 transitions, 2903 flow [2024-06-21 17:12:17,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 224 transitions, 2788 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:17,725 INFO L231 Difference]: Finished difference. Result has 125 places, 180 transitions, 2239 flow [2024-06-21 17:12:17,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2239, PETRI_PLACES=125, PETRI_TRANSITIONS=180} [2024-06-21 17:12:17,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 17:12:17,726 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 180 transitions, 2239 flow [2024-06-21 17:12:17,726 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 17:12:17,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:17,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:17,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:12:17,727 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:17,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:17,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1791965001, now seen corresponding path program 2 times [2024-06-21 17:12:17,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:17,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130443112] [2024-06-21 17:12:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:17,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:21,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:21,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130443112] [2024-06-21 17:12:21,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130443112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:21,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:21,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:21,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666850653] [2024-06-21 17:12:21,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:21,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:21,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:21,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:21,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:21,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 180 transitions, 2239 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 17:12:21,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:21,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:21,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:22,692 INFO L124 PetriNetUnfolderBase]: 2266/3470 cut-off events. [2024-06-21 17:12:22,692 INFO L125 PetriNetUnfolderBase]: For 51362/51364 co-relation queries the response was YES. [2024-06-21 17:12:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21314 conditions, 3470 events. 2266/3470 cut-off events. For 51362/51364 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17670 event pairs, 653 based on Foata normal form. 8/3477 useless extension candidates. Maximal degree in co-relation 21254. Up to 3151 conditions per place. [2024-06-21 17:12:22,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 45 changer transitions 0/222 dead transitions. [2024-06-21 17:12:22,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2843 flow [2024-06-21 17:12:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:12:22,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 17:12:22,763 INFO L175 Difference]: Start difference. First operand has 125 places, 180 transitions, 2239 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:12:22,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2843 flow [2024-06-21 17:12:22,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 222 transitions, 2737 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 17:12:22,823 INFO L231 Difference]: Finished difference. Result has 129 places, 182 transitions, 2278 flow [2024-06-21 17:12:22,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2278, PETRI_PLACES=129, PETRI_TRANSITIONS=182} [2024-06-21 17:12:22,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 17:12:22,824 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 182 transitions, 2278 flow [2024-06-21 17:12:22,824 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 17:12:22,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:22,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:22,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:12:22,824 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 17:12:22,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:22,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1671192963, now seen corresponding path program 3 times [2024-06-21 17:12:22,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:22,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245846883] [2024-06-21 17:12:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:22,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:25,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:25,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245846883] [2024-06-21 17:12:25,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245846883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:25,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:25,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809140327] [2024-06-21 17:12:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:25,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:25,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:25,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:25,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:25,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:25,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 182 transitions, 2278 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 17:12:25,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:25,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:25,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:27,057 INFO L124 PetriNetUnfolderBase]: 2294/3514 cut-off events. [2024-06-21 17:12:27,057 INFO L125 PetriNetUnfolderBase]: For 54417/54419 co-relation queries the response was YES. [2024-06-21 17:12:27,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21648 conditions, 3514 events. 2294/3514 cut-off events. For 54417/54419 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17953 event pairs, 659 based on Foata normal form. 8/3521 useless extension candidates. Maximal degree in co-relation 21586. Up to 3249 conditions per place. [2024-06-21 17:12:27,084 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 33 changer transitions 0/220 dead transitions. [2024-06-21 17:12:27,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 220 transitions, 2851 flow [2024-06-21 17:12:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:12:27,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:12:27,086 INFO L175 Difference]: Start difference. First operand has 129 places, 182 transitions, 2278 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:12:27,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 220 transitions, 2851 flow [2024-06-21 17:12:27,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 220 transitions, 2746 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:27,159 INFO L231 Difference]: Finished difference. Result has 131 places, 184 transitions, 2288 flow [2024-06-21 17:12:27,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2288, PETRI_PLACES=131, PETRI_TRANSITIONS=184} [2024-06-21 17:12:27,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 17:12:27,160 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 184 transitions, 2288 flow [2024-06-21 17:12:27,160 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 17:12:27,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:27,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:12:27,161 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 17:12:27,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -49496853, now seen corresponding path program 1 times [2024-06-21 17:12:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:27,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151741132] [2024-06-21 17:12:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:27,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:30,667 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 17:12:30,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151741132] [2024-06-21 17:12:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151741132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:30,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:30,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:30,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302783030] [2024-06-21 17:12:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:30,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:30,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:30,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:30,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:30,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 184 transitions, 2288 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 17:12:30,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:30,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:30,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:32,320 INFO L124 PetriNetUnfolderBase]: 2382/3603 cut-off events. [2024-06-21 17:12:32,320 INFO L125 PetriNetUnfolderBase]: For 62212/62214 co-relation queries the response was YES. [2024-06-21 17:12:32,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22310 conditions, 3603 events. 2382/3603 cut-off events. For 62212/62214 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18166 event pairs, 596 based on Foata normal form. 20/3622 useless extension candidates. Maximal degree in co-relation 22247. Up to 3118 conditions per place. [2024-06-21 17:12:32,348 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-21 17:12:32,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 241 transitions, 3035 flow [2024-06-21 17:12:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 17:12:32,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:12:32,350 INFO L175 Difference]: Start difference. First operand has 131 places, 184 transitions, 2288 flow. Second operand 10 states and 186 transitions. [2024-06-21 17:12:32,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 241 transitions, 3035 flow [2024-06-21 17:12:32,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 241 transitions, 2952 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:32,428 INFO L231 Difference]: Finished difference. Result has 135 places, 187 transitions, 2381 flow [2024-06-21 17:12:32,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2381, PETRI_PLACES=135, PETRI_TRANSITIONS=187} [2024-06-21 17:12:32,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 17:12:32,429 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 187 transitions, 2381 flow [2024-06-21 17:12:32,429 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 17:12:32,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:32,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:32,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:12:32,430 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 17:12:32,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1746293681, now seen corresponding path program 4 times [2024-06-21 17:12:32,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:32,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074241575] [2024-06-21 17:12:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:35,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:35,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074241575] [2024-06-21 17:12:35,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074241575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:35,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:35,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864893757] [2024-06-21 17:12:35,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:35,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:35,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:35,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:35,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 187 transitions, 2381 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 17:12:35,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:35,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:35,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:36,803 INFO L124 PetriNetUnfolderBase]: 2369/3629 cut-off events. [2024-06-21 17:12:36,803 INFO L125 PetriNetUnfolderBase]: For 63934/63936 co-relation queries the response was YES. [2024-06-21 17:12:36,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22784 conditions, 3629 events. 2369/3629 cut-off events. For 63934/63936 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18745 event pairs, 516 based on Foata normal form. 8/3636 useless extension candidates. Maximal degree in co-relation 22720. Up to 3250 conditions per place. [2024-06-21 17:12:36,829 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 46 changer transitions 0/221 dead transitions. [2024-06-21 17:12:36,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 221 transitions, 2913 flow [2024-06-21 17:12:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:12:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:12:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:12:36,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 17:12:36,831 INFO L175 Difference]: Start difference. First operand has 135 places, 187 transitions, 2381 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:12:36,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 221 transitions, 2913 flow [2024-06-21 17:12:36,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 221 transitions, 2757 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:36,907 INFO L231 Difference]: Finished difference. Result has 134 places, 187 transitions, 2334 flow [2024-06-21 17:12:36,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2334, PETRI_PLACES=134, PETRI_TRANSITIONS=187} [2024-06-21 17:12:36,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 17:12:36,908 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 187 transitions, 2334 flow [2024-06-21 17:12:36,908 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 17:12:36,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:36,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:36,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:12:36,909 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 17:12:36,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash -896625223, now seen corresponding path program 2 times [2024-06-21 17:12:36,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:36,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035282918] [2024-06-21 17:12:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:36,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:40,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:40,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035282918] [2024-06-21 17:12:40,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035282918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:40,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:40,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:40,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047610478] [2024-06-21 17:12:40,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:40,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:40,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 187 transitions, 2334 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 17:12:40,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:40,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:40,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:41,394 INFO L124 PetriNetUnfolderBase]: 2389/3683 cut-off events. [2024-06-21 17:12:41,394 INFO L125 PetriNetUnfolderBase]: For 66176/66199 co-relation queries the response was YES. [2024-06-21 17:12:41,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22887 conditions, 3683 events. 2389/3683 cut-off events. For 66176/66199 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19094 event pairs, 645 based on Foata normal form. 27/3709 useless extension candidates. Maximal degree in co-relation 22822. Up to 3360 conditions per place. [2024-06-21 17:12:41,417 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 24 changer transitions 0/218 dead transitions. [2024-06-21 17:12:41,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 218 transitions, 2866 flow [2024-06-21 17:12:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:12:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:12:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:12:41,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 17:12:41,426 INFO L175 Difference]: Start difference. First operand has 134 places, 187 transitions, 2334 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:12:41,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 218 transitions, 2866 flow [2024-06-21 17:12:41,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2763 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:41,496 INFO L231 Difference]: Finished difference. Result has 135 places, 189 transitions, 2318 flow [2024-06-21 17:12:41,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2318, PETRI_PLACES=135, PETRI_TRANSITIONS=189} [2024-06-21 17:12:41,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 17:12:41,497 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 189 transitions, 2318 flow [2024-06-21 17:12:41,497 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 17:12:41,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:41,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:12:41,497 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 17:12:41,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash -896616853, now seen corresponding path program 3 times [2024-06-21 17:12:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837975014] [2024-06-21 17:12:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:41,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:44,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837975014] [2024-06-21 17:12:44,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837975014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:44,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:44,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:44,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689733274] [2024-06-21 17:12:44,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:44,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:44,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:44,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:44,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:44,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:44,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 189 transitions, 2318 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 17:12:44,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:44,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:44,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:45,884 INFO L124 PetriNetUnfolderBase]: 2409/3701 cut-off events. [2024-06-21 17:12:45,885 INFO L125 PetriNetUnfolderBase]: For 66813/66836 co-relation queries the response was YES. [2024-06-21 17:12:45,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23132 conditions, 3701 events. 2409/3701 cut-off events. For 66813/66836 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19081 event pairs, 603 based on Foata normal form. 27/3727 useless extension candidates. Maximal degree in co-relation 23066. Up to 3292 conditions per place. [2024-06-21 17:12:45,913 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 31 changer transitions 0/225 dead transitions. [2024-06-21 17:12:45,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 225 transitions, 3000 flow [2024-06-21 17:12:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:12:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:12:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:12:45,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 17:12:45,915 INFO L175 Difference]: Start difference. First operand has 135 places, 189 transitions, 2318 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:12:45,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 225 transitions, 3000 flow [2024-06-21 17:12:46,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 225 transitions, 2931 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:46,005 INFO L231 Difference]: Finished difference. Result has 138 places, 194 transitions, 2408 flow [2024-06-21 17:12:46,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2408, PETRI_PLACES=138, PETRI_TRANSITIONS=194} [2024-06-21 17:12:46,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 17:12:46,005 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 194 transitions, 2408 flow [2024-06-21 17:12:46,006 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 17:12:46,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:46,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:46,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:12:46,006 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 17:12:46,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash -903111973, now seen corresponding path program 4 times [2024-06-21 17:12:46,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:46,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642915889] [2024-06-21 17:12:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:49,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:49,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642915889] [2024-06-21 17:12:49,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642915889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:49,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:49,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:49,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164134827] [2024-06-21 17:12:49,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:49,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:49,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:49,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:49,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:49,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 194 transitions, 2408 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 17:12:49,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:49,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:49,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:50,674 INFO L124 PetriNetUnfolderBase]: 2469/3746 cut-off events. [2024-06-21 17:12:50,674 INFO L125 PetriNetUnfolderBase]: For 76537/76539 co-relation queries the response was YES. [2024-06-21 17:12:50,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23915 conditions, 3746 events. 2469/3746 cut-off events. For 76537/76539 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19006 event pairs, 596 based on Foata normal form. 20/3765 useless extension candidates. Maximal degree in co-relation 23847. Up to 3159 conditions per place. [2024-06-21 17:12:50,703 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 173 selfloop transitions, 59 changer transitions 0/236 dead transitions. [2024-06-21 17:12:50,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 236 transitions, 3066 flow [2024-06-21 17:12:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:12:50,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 17:12:50,705 INFO L175 Difference]: Start difference. First operand has 138 places, 194 transitions, 2408 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:12:50,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 236 transitions, 3066 flow [2024-06-21 17:12:50,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 236 transitions, 2991 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 17:12:50,799 INFO L231 Difference]: Finished difference. Result has 143 places, 196 transitions, 2517 flow [2024-06-21 17:12:50,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2517, PETRI_PLACES=143, PETRI_TRANSITIONS=196} [2024-06-21 17:12:50,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 17:12:50,800 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 196 transitions, 2517 flow [2024-06-21 17:12:50,800 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 17:12:50,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:50,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:12:50,800 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 17:12:50,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1839674887, now seen corresponding path program 1 times [2024-06-21 17:12:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:50,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719710270] [2024-06-21 17:12:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:52,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:52,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719710270] [2024-06-21 17:12:52,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719710270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:52,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:52,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:12:52,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888512688] [2024-06-21 17:12:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:52,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:12:52,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:12:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:12:52,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:52,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 196 transitions, 2517 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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 17:12:52,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:52,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:52,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:53,856 INFO L124 PetriNetUnfolderBase]: 2446/3774 cut-off events. [2024-06-21 17:12:53,856 INFO L125 PetriNetUnfolderBase]: For 78359/78381 co-relation queries the response was YES. [2024-06-21 17:12:53,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24577 conditions, 3774 events. 2446/3774 cut-off events. For 78359/78381 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19603 event pairs, 626 based on Foata normal form. 28/3788 useless extension candidates. Maximal degree in co-relation 24507. Up to 3495 conditions per place. [2024-06-21 17:12:53,887 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-21 17:12:53,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 224 transitions, 3135 flow [2024-06-21 17:12:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:12:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:12:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 17:12:53,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 17:12:53,889 INFO L175 Difference]: Start difference. First operand has 143 places, 196 transitions, 2517 flow. Second operand 6 states and 109 transitions. [2024-06-21 17:12:53,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 224 transitions, 3135 flow [2024-06-21 17:12:53,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 224 transitions, 2999 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:53,992 INFO L231 Difference]: Finished difference. Result has 144 places, 204 transitions, 2552 flow [2024-06-21 17:12:53,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2381, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2552, PETRI_PLACES=144, PETRI_TRANSITIONS=204} [2024-06-21 17:12:53,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 17:12:53,993 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 204 transitions, 2552 flow [2024-06-21 17:12:53,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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 17:12:53,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:53,993 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 17:12:53,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:12:53,993 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 17:12:53,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:53,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1323063108, now seen corresponding path program 1 times [2024-06-21 17:12:53,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:53,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111277004] [2024-06-21 17:12:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:53,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:57,333 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 17:12:57,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:57,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111277004] [2024-06-21 17:12:57,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111277004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:57,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:57,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:12:57,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793082189] [2024-06-21 17:12:57,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:57,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:12:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:12:57,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:12:57,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:12:57,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 204 transitions, 2552 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 17:12:57,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:57,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:12:57,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:59,461 INFO L124 PetriNetUnfolderBase]: 3587/5595 cut-off events. [2024-06-21 17:12:59,461 INFO L125 PetriNetUnfolderBase]: For 152190/152192 co-relation queries the response was YES. [2024-06-21 17:12:59,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35614 conditions, 5595 events. 3587/5595 cut-off events. For 152190/152192 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31874 event pairs, 740 based on Foata normal form. 66/5660 useless extension candidates. Maximal degree in co-relation 35542. Up to 2330 conditions per place. [2024-06-21 17:12:59,511 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 187 selfloop transitions, 117 changer transitions 0/308 dead transitions. [2024-06-21 17:12:59,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 308 transitions, 3969 flow [2024-06-21 17:12:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-21 17:12:59,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-06-21 17:12:59,513 INFO L175 Difference]: Start difference. First operand has 144 places, 204 transitions, 2552 flow. Second operand 11 states and 230 transitions. [2024-06-21 17:12:59,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 308 transitions, 3969 flow [2024-06-21 17:12:59,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 308 transitions, 3908 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 17:12:59,688 INFO L231 Difference]: Finished difference. Result has 155 places, 213 transitions, 2969 flow [2024-06-21 17:12:59,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2969, PETRI_PLACES=155, PETRI_TRANSITIONS=213} [2024-06-21 17:12:59,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 17:12:59,689 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 213 transitions, 2969 flow [2024-06-21 17:12:59,689 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 17:12:59,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:59,689 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 17:12:59,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:12:59,689 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:59,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash 988465312, now seen corresponding path program 2 times [2024-06-21 17:12:59,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:59,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832488591] [2024-06-21 17:12:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:59,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:03,178 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 17:13:03,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:03,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832488591] [2024-06-21 17:13:03,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832488591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:03,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:03,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:03,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197451967] [2024-06-21 17:13:03,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:03,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:03,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:03,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:03,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:03,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:03,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 213 transitions, 2969 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 17:13:03,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:03,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:03,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:05,509 INFO L124 PetriNetUnfolderBase]: 3899/6119 cut-off events. [2024-06-21 17:13:05,509 INFO L125 PetriNetUnfolderBase]: For 177897/177899 co-relation queries the response was YES. [2024-06-21 17:13:05,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39379 conditions, 6119 events. 3899/6119 cut-off events. For 177897/177899 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35804 event pairs, 1287 based on Foata normal form. 76/6194 useless extension candidates. Maximal degree in co-relation 39303. Up to 4557 conditions per place. [2024-06-21 17:13:05,556 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 116 changer transitions 0/287 dead transitions. [2024-06-21 17:13:05,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 287 transitions, 3942 flow [2024-06-21 17:13:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:13:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:13:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-21 17:13:05,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 17:13:05,557 INFO L175 Difference]: Start difference. First operand has 155 places, 213 transitions, 2969 flow. Second operand 12 states and 230 transitions. [2024-06-21 17:13:05,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 287 transitions, 3942 flow [2024-06-21 17:13:05,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 287 transitions, 3717 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 17:13:05,761 INFO L231 Difference]: Finished difference. Result has 162 places, 215 transitions, 3048 flow [2024-06-21 17:13:05,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3048, PETRI_PLACES=162, PETRI_TRANSITIONS=215} [2024-06-21 17:13:05,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 17:13:05,763 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 215 transitions, 3048 flow [2024-06-21 17:13:05,763 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 17:13:05,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:05,770 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 17:13:05,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:13:05,770 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 17:13:05,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash 988317442, now seen corresponding path program 3 times [2024-06-21 17:13:05,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:05,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716751678] [2024-06-21 17:13:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:05,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:09,069 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 17:13:09,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:09,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716751678] [2024-06-21 17:13:09,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716751678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:09,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:09,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:09,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828149825] [2024-06-21 17:13:09,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:09,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:09,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:09,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:09,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 215 transitions, 3048 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 17:13:09,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:09,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:09,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:11,802 INFO L124 PetriNetUnfolderBase]: 4452/7018 cut-off events. [2024-06-21 17:13:11,802 INFO L125 PetriNetUnfolderBase]: For 205636/205638 co-relation queries the response was YES. [2024-06-21 17:13:11,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44550 conditions, 7018 events. 4452/7018 cut-off events. For 205636/205638 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42662 event pairs, 1423 based on Foata normal form. 66/7083 useless extension candidates. Maximal degree in co-relation 44472. Up to 4472 conditions per place. [2024-06-21 17:13:11,857 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 118 changer transitions 0/304 dead transitions. [2024-06-21 17:13:11,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 304 transitions, 4218 flow [2024-06-21 17:13:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:13:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:13:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-21 17:13:11,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781746031746032 [2024-06-21 17:13:11,859 INFO L175 Difference]: Start difference. First operand has 162 places, 215 transitions, 3048 flow. Second operand 12 states and 241 transitions. [2024-06-21 17:13:11,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 304 transitions, 4218 flow [2024-06-21 17:13:12,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 304 transitions, 3949 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 17:13:12,119 INFO L231 Difference]: Finished difference. Result has 165 places, 220 transitions, 3146 flow [2024-06-21 17:13:12,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3146, PETRI_PLACES=165, PETRI_TRANSITIONS=220} [2024-06-21 17:13:12,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 17:13:12,120 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 220 transitions, 3146 flow [2024-06-21 17:13:12,120 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 17:13:12,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:12,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:13:12,120 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 17:13:12,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash 272886666, now seen corresponding path program 4 times [2024-06-21 17:13:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:12,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740959492] [2024-06-21 17:13:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:12,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:15,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740959492] [2024-06-21 17:13:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740959492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:15,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:15,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:15,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198008105] [2024-06-21 17:13:15,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:15,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:15,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:15,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:15,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 220 transitions, 3146 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 17:13:15,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:15,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:15,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:18,339 INFO L124 PetriNetUnfolderBase]: 4764/7518 cut-off events. [2024-06-21 17:13:18,339 INFO L125 PetriNetUnfolderBase]: For 228953/228955 co-relation queries the response was YES. [2024-06-21 17:13:18,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47138 conditions, 7518 events. 4764/7518 cut-off events. For 228953/228955 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 46597 event pairs, 1801 based on Foata normal form. 76/7593 useless extension candidates. Maximal degree in co-relation 47058. Up to 6292 conditions per place. [2024-06-21 17:13:18,394 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 212 selfloop transitions, 85 changer transitions 0/301 dead transitions. [2024-06-21 17:13:18,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 301 transitions, 4193 flow [2024-06-21 17:13:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:13:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:13:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-21 17:13:18,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-21 17:13:18,396 INFO L175 Difference]: Start difference. First operand has 165 places, 220 transitions, 3146 flow. Second operand 13 states and 246 transitions. [2024-06-21 17:13:18,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 301 transitions, 4193 flow [2024-06-21 17:13:18,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 301 transitions, 3982 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 17:13:18,664 INFO L231 Difference]: Finished difference. Result has 170 places, 222 transitions, 3184 flow [2024-06-21 17:13:18,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3184, PETRI_PLACES=170, PETRI_TRANSITIONS=222} [2024-06-21 17:13:18,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 17:13:18,665 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 222 transitions, 3184 flow [2024-06-21 17:13:18,665 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 17:13:18,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:18,666 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 17:13:18,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:13:18,666 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 17:13:18,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1539978096, now seen corresponding path program 5 times [2024-06-21 17:13:18,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:18,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159683039] [2024-06-21 17:13:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:18,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:22,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:22,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159683039] [2024-06-21 17:13:22,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159683039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:22,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:22,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:22,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286042414] [2024-06-21 17:13:22,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:22,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:22,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:22,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:22,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 222 transitions, 3184 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 17:13:22,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:22,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:22,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:24,970 INFO L124 PetriNetUnfolderBase]: 5076/8048 cut-off events. [2024-06-21 17:13:24,971 INFO L125 PetriNetUnfolderBase]: For 243277/243279 co-relation queries the response was YES. [2024-06-21 17:13:25,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49788 conditions, 8048 events. 5076/8048 cut-off events. For 243277/243279 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 50928 event pairs, 1951 based on Foata normal form. 76/8123 useless extension candidates. Maximal degree in co-relation 49706. Up to 6816 conditions per place. [2024-06-21 17:13:25,036 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 208 selfloop transitions, 81 changer transitions 0/293 dead transitions. [2024-06-21 17:13:25,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 293 transitions, 4201 flow [2024-06-21 17:13:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 17:13:25,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-21 17:13:25,043 INFO L175 Difference]: Start difference. First operand has 170 places, 222 transitions, 3184 flow. Second operand 11 states and 214 transitions. [2024-06-21 17:13:25,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 293 transitions, 4201 flow [2024-06-21 17:13:25,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 293 transitions, 3991 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-21 17:13:25,344 INFO L231 Difference]: Finished difference. Result has 170 places, 224 transitions, 3217 flow [2024-06-21 17:13:25,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3217, PETRI_PLACES=170, PETRI_TRANSITIONS=224} [2024-06-21 17:13:25,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 17:13:25,345 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 224 transitions, 3217 flow [2024-06-21 17:13:25,345 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 17:13:25,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:25,346 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 17:13:25,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:13:25,346 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 17:13:25,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1540125966, now seen corresponding path program 6 times [2024-06-21 17:13:25,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:25,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623201131] [2024-06-21 17:13:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:25,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:28,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:28,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623201131] [2024-06-21 17:13:28,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623201131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:28,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:28,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:28,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404789413] [2024-06-21 17:13:28,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:28,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:28,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:28,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:28,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:28,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:28,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 224 transitions, 3217 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 17:13:28,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:28,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:28,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:31,840 INFO L124 PetriNetUnfolderBase]: 5637/8953 cut-off events. [2024-06-21 17:13:31,840 INFO L125 PetriNetUnfolderBase]: For 280870/280872 co-relation queries the response was YES. [2024-06-21 17:13:31,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55149 conditions, 8953 events. 5637/8953 cut-off events. For 280870/280872 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 58113 event pairs, 1981 based on Foata normal form. 66/9018 useless extension candidates. Maximal degree in co-relation 55066. Up to 6158 conditions per place. [2024-06-21 17:13:31,909 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 221 selfloop transitions, 81 changer transitions 0/306 dead transitions. [2024-06-21 17:13:31,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 306 transitions, 4439 flow [2024-06-21 17:13:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 17:13:31,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-21 17:13:31,911 INFO L175 Difference]: Start difference. First operand has 170 places, 224 transitions, 3217 flow. Second operand 11 states and 219 transitions. [2024-06-21 17:13:31,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 306 transitions, 4439 flow [2024-06-21 17:13:32,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 306 transitions, 4235 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 17:13:32,258 INFO L231 Difference]: Finished difference. Result has 173 places, 229 transitions, 3345 flow [2024-06-21 17:13:32,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3345, PETRI_PLACES=173, PETRI_TRANSITIONS=229} [2024-06-21 17:13:32,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 17:13:32,258 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 229 transitions, 3345 flow [2024-06-21 17:13:32,259 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 17:13:32,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:32,259 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 17:13:32,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:13:32,259 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 17:13:32,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:32,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1534400514, now seen corresponding path program 1 times [2024-06-21 17:13:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:32,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53057104] [2024-06-21 17:13:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:36,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:36,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53057104] [2024-06-21 17:13:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53057104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:36,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:36,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226410598] [2024-06-21 17:13:36,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:36,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:36,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:36,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 229 transitions, 3345 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:36,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:36,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:36,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:39,278 INFO L124 PetriNetUnfolderBase]: 5849/9361 cut-off events. [2024-06-21 17:13:39,279 INFO L125 PetriNetUnfolderBase]: For 292649/292651 co-relation queries the response was YES. [2024-06-21 17:13:39,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57089 conditions, 9361 events. 5849/9361 cut-off events. For 292649/292651 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 61900 event pairs, 2222 based on Foata normal form. 56/9416 useless extension candidates. Maximal degree in co-relation 57004. Up to 7031 conditions per place. [2024-06-21 17:13:39,366 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 219 selfloop transitions, 93 changer transitions 0/316 dead transitions. [2024-06-21 17:13:39,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 316 transitions, 4485 flow [2024-06-21 17:13:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:13:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:13:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-21 17:13:39,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-21 17:13:39,370 INFO L175 Difference]: Start difference. First operand has 173 places, 229 transitions, 3345 flow. Second operand 13 states and 250 transitions. [2024-06-21 17:13:39,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 316 transitions, 4485 flow [2024-06-21 17:13:39,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 316 transitions, 4316 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 17:13:39,924 INFO L231 Difference]: Finished difference. Result has 179 places, 231 transitions, 3442 flow [2024-06-21 17:13:39,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3442, PETRI_PLACES=179, PETRI_TRANSITIONS=231} [2024-06-21 17:13:39,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 17:13:39,925 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 231 transitions, 3442 flow [2024-06-21 17:13:39,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:39,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:39,926 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 17:13:39,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:13:39,926 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 17:13:39,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash 543087694, now seen corresponding path program 7 times [2024-06-21 17:13:39,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:39,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812951431] [2024-06-21 17:13:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:39,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:43,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812951431] [2024-06-21 17:13:43,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812951431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:43,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:43,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:43,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973289050] [2024-06-21 17:13:43,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:43,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:43,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:43,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:43,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:43,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 231 transitions, 3442 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 17:13:43,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:43,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:43,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:45,923 INFO L124 PetriNetUnfolderBase]: 5881/9455 cut-off events. [2024-06-21 17:13:45,923 INFO L125 PetriNetUnfolderBase]: For 286299/286322 co-relation queries the response was YES. [2024-06-21 17:13:45,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57653 conditions, 9455 events. 5881/9455 cut-off events. For 286299/286322 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 63059 event pairs, 2576 based on Foata normal form. 43/9497 useless extension candidates. Maximal degree in co-relation 57566. Up to 8781 conditions per place. [2024-06-21 17:13:46,003 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 236 selfloop transitions, 46 changer transitions 0/286 dead transitions. [2024-06-21 17:13:46,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 286 transitions, 4188 flow [2024-06-21 17:13:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:13:46,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:13:46,005 INFO L175 Difference]: Start difference. First operand has 179 places, 231 transitions, 3442 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:13:46,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 286 transitions, 4188 flow [2024-06-21 17:13:46,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 286 transitions, 3942 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-21 17:13:46,458 INFO L231 Difference]: Finished difference. Result has 178 places, 232 transitions, 3325 flow [2024-06-21 17:13:46,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3325, PETRI_PLACES=178, PETRI_TRANSITIONS=232} [2024-06-21 17:13:46,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 17:13:46,459 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 232 transitions, 3325 flow [2024-06-21 17:13:46,459 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 17:13:46,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:46,459 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 17:13:46,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:13:46,459 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 17:13:46,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash -571569430, now seen corresponding path program 8 times [2024-06-21 17:13:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:46,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341256498] [2024-06-21 17:13:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:46,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:49,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:49,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341256498] [2024-06-21 17:13:49,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341256498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:49,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:49,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:49,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829159137] [2024-06-21 17:13:49,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:49,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:49,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:49,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:49,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 232 transitions, 3325 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 17:13:49,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:49,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:49,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:52,168 INFO L124 PetriNetUnfolderBase]: 6381/10295 cut-off events. [2024-06-21 17:13:52,169 INFO L125 PetriNetUnfolderBase]: For 334694/334696 co-relation queries the response was YES. [2024-06-21 17:13:52,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60798 conditions, 10295 events. 6381/10295 cut-off events. For 334694/334696 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 70098 event pairs, 2593 based on Foata normal form. 76/10370 useless extension candidates. Maximal degree in co-relation 60710. Up to 8358 conditions per place. [2024-06-21 17:13:52,263 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 186 selfloop transitions, 102 changer transitions 0/292 dead transitions. [2024-06-21 17:13:52,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 292 transitions, 4200 flow [2024-06-21 17:13:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 17:13:52,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:13:52,265 INFO L175 Difference]: Start difference. First operand has 178 places, 232 transitions, 3325 flow. Second operand 10 states and 192 transitions. [2024-06-21 17:13:52,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 292 transitions, 4200 flow [2024-06-21 17:13:52,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 292 transitions, 4087 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 17:13:52,729 INFO L231 Difference]: Finished difference. Result has 180 places, 234 transitions, 3511 flow [2024-06-21 17:13:52,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3511, PETRI_PLACES=180, PETRI_TRANSITIONS=234} [2024-06-21 17:13:52,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 17:13:52,730 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 234 transitions, 3511 flow [2024-06-21 17:13:52,731 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 17:13:52,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:52,731 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 17:13:52,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:13:52,731 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:52,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2062724256, now seen corresponding path program 9 times [2024-06-21 17:13:52,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:52,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056011821] [2024-06-21 17:13:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:55,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056011821] [2024-06-21 17:13:55,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056011821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:55,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:55,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275665925] [2024-06-21 17:13:55,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:55,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:55,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:55,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:13:55,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 234 transitions, 3511 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 17:13:55,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:55,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:13:55,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:58,708 INFO L124 PetriNetUnfolderBase]: 6840/11084 cut-off events. [2024-06-21 17:13:58,709 INFO L125 PetriNetUnfolderBase]: For 358705/358707 co-relation queries the response was YES. [2024-06-21 17:13:58,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64415 conditions, 11084 events. 6840/11084 cut-off events. For 358705/358707 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 76974 event pairs, 2888 based on Foata normal form. 76/11159 useless extension candidates. Maximal degree in co-relation 64326. Up to 9139 conditions per place. [2024-06-21 17:13:58,799 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 197 selfloop transitions, 98 changer transitions 0/299 dead transitions. [2024-06-21 17:13:58,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 299 transitions, 4486 flow [2024-06-21 17:13:58,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 17:13:58,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 17:13:58,801 INFO L175 Difference]: Start difference. First operand has 180 places, 234 transitions, 3511 flow. Second operand 10 states and 199 transitions. [2024-06-21 17:13:58,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 299 transitions, 4486 flow [2024-06-21 17:13:59,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 299 transitions, 4240 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 17:13:59,347 INFO L231 Difference]: Finished difference. Result has 182 places, 236 transitions, 3560 flow [2024-06-21 17:13:59,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3560, PETRI_PLACES=182, PETRI_TRANSITIONS=236} [2024-06-21 17:13:59,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 17:13:59,348 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 236 transitions, 3560 flow [2024-06-21 17:13:59,348 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 17:13:59,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:59,348 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 17:13:59,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:13:59,349 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:59,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2062576386, now seen corresponding path program 10 times [2024-06-21 17:13:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:59,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251088627] [2024-06-21 17:13:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:02,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:02,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251088627] [2024-06-21 17:14:02,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251088627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:02,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:02,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:02,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554908798] [2024-06-21 17:14:02,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:02,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:02,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:02,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:02,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:02,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:02,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 236 transitions, 3560 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 17:14:02,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:02,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:02,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:05,653 INFO L124 PetriNetUnfolderBase]: 7185/11673 cut-off events. [2024-06-21 17:14:05,654 INFO L125 PetriNetUnfolderBase]: For 361595/361597 co-relation queries the response was YES. [2024-06-21 17:14:05,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65890 conditions, 11673 events. 7185/11673 cut-off events. For 361595/361597 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 82185 event pairs, 2257 based on Foata normal form. 66/11738 useless extension candidates. Maximal degree in co-relation 65800. Up to 6528 conditions per place. [2024-06-21 17:14:05,775 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 204 selfloop transitions, 107 changer transitions 0/315 dead transitions. [2024-06-21 17:14:05,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 315 transitions, 4776 flow [2024-06-21 17:14:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:14:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:14:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-21 17:14:05,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 17:14:05,778 INFO L175 Difference]: Start difference. First operand has 182 places, 236 transitions, 3560 flow. Second operand 10 states and 205 transitions. [2024-06-21 17:14:05,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 315 transitions, 4776 flow [2024-06-21 17:14:06,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 315 transitions, 4534 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 17:14:06,796 INFO L231 Difference]: Finished difference. Result has 185 places, 242 transitions, 3744 flow [2024-06-21 17:14:06,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3744, PETRI_PLACES=185, PETRI_TRANSITIONS=242} [2024-06-21 17:14:06,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 17:14:06,797 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 242 transitions, 3744 flow [2024-06-21 17:14:06,797 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 17:14:06,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:06,797 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 17:14:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:14:06,797 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:06,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash 799803406, now seen corresponding path program 2 times [2024-06-21 17:14:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:06,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083295046] [2024-06-21 17:14:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:10,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:10,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083295046] [2024-06-21 17:14:10,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083295046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:10,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:10,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:14:10,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776934123] [2024-06-21 17:14:10,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:10,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:14:10,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:10,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:14:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:14:10,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:10,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 242 transitions, 3744 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:10,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:10,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:10,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:13,363 INFO L124 PetriNetUnfolderBase]: 7233/11767 cut-off events. [2024-06-21 17:14:13,364 INFO L125 PetriNetUnfolderBase]: For 346150/346173 co-relation queries the response was YES. [2024-06-21 17:14:13,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66846 conditions, 11767 events. 7233/11767 cut-off events. For 346150/346173 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 83524 event pairs, 3383 based on Foata normal form. 35/11801 useless extension candidates. Maximal degree in co-relation 66754. Up to 10975 conditions per place. [2024-06-21 17:14:13,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 252 selfloop transitions, 49 changer transitions 0/305 dead transitions. [2024-06-21 17:14:13,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 305 transitions, 4554 flow [2024-06-21 17:14:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:14:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:14:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 17:14:13,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 17:14:13,471 INFO L175 Difference]: Start difference. First operand has 185 places, 242 transitions, 3744 flow. Second operand 11 states and 192 transitions. [2024-06-21 17:14:13,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 305 transitions, 4554 flow [2024-06-21 17:14:14,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 305 transitions, 4183 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 17:14:14,383 INFO L231 Difference]: Finished difference. Result has 187 places, 243 transitions, 3507 flow [2024-06-21 17:14:14,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3507, PETRI_PLACES=187, PETRI_TRANSITIONS=243} [2024-06-21 17:14:14,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 17:14:14,385 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 243 transitions, 3507 flow [2024-06-21 17:14:14,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:14,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:14,386 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 17:14:14,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:14:14,386 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:14,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:14,386 INFO L85 PathProgramCache]: Analyzing trace with hash 809000176, now seen corresponding path program 3 times [2024-06-21 17:14:14,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:14,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072160276] [2024-06-21 17:14:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:14,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:17,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:17,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072160276] [2024-06-21 17:14:17,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072160276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:17,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:17,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:14:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285460745] [2024-06-21 17:14:17,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:17,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:14:17,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:17,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:14:17,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:14:17,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:17,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 243 transitions, 3507 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:17,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:17,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:17,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:20,814 INFO L124 PetriNetUnfolderBase]: 7281/11863 cut-off events. [2024-06-21 17:14:20,814 INFO L125 PetriNetUnfolderBase]: For 351069/351092 co-relation queries the response was YES. [2024-06-21 17:14:20,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65844 conditions, 11863 events. 7281/11863 cut-off events. For 351069/351092 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 84067 event pairs, 3361 based on Foata normal form. 35/11897 useless extension candidates. Maximal degree in co-relation 65752. Up to 10103 conditions per place. [2024-06-21 17:14:20,933 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 60 changer transitions 0/301 dead transitions. [2024-06-21 17:14:20,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 301 transitions, 4373 flow [2024-06-21 17:14:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:14:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:14:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 17:14:20,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:14:20,935 INFO L175 Difference]: Start difference. First operand has 187 places, 243 transitions, 3507 flow. Second operand 10 states and 177 transitions. [2024-06-21 17:14:20,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 301 transitions, 4373 flow [2024-06-21 17:14:21,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 301 transitions, 4249 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 17:14:21,700 INFO L231 Difference]: Finished difference. Result has 188 places, 244 transitions, 3539 flow [2024-06-21 17:14:21,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3539, PETRI_PLACES=188, PETRI_TRANSITIONS=244} [2024-06-21 17:14:21,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-21 17:14:21,701 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 244 transitions, 3539 flow [2024-06-21 17:14:21,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:21,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:21,702 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 17:14:21,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:14:21,702 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:21,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2068301838, now seen corresponding path program 4 times [2024-06-21 17:14:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:21,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834638916] [2024-06-21 17:14:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:21,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:25,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:25,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834638916] [2024-06-21 17:14:25,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834638916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:25,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:25,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:14:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830026135] [2024-06-21 17:14:25,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:25,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:14:25,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:14:25,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:14:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:25,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 244 transitions, 3539 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:25,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:25,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:25,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:28,639 INFO L124 PetriNetUnfolderBase]: 7629/12529 cut-off events. [2024-06-21 17:14:28,639 INFO L125 PetriNetUnfolderBase]: For 393556/393558 co-relation queries the response was YES. [2024-06-21 17:14:28,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68171 conditions, 12529 events. 7629/12529 cut-off events. For 393556/393558 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 90992 event pairs, 2944 based on Foata normal form. 56/12584 useless extension candidates. Maximal degree in co-relation 68078. Up to 8442 conditions per place. [2024-06-21 17:14:28,753 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 191 selfloop transitions, 114 changer transitions 0/309 dead transitions. [2024-06-21 17:14:28,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 309 transitions, 4413 flow [2024-06-21 17:14:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:14:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:14:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 17:14:28,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:14:28,754 INFO L175 Difference]: Start difference. First operand has 188 places, 244 transitions, 3539 flow. Second operand 10 states and 195 transitions. [2024-06-21 17:14:28,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 309 transitions, 4413 flow [2024-06-21 17:14:29,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 309 transitions, 4282 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 17:14:29,392 INFO L231 Difference]: Finished difference. Result has 191 places, 245 transitions, 3682 flow [2024-06-21 17:14:29,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3682, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2024-06-21 17:14:29,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 17:14:29,393 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 3682 flow [2024-06-21 17:14:29,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:29,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:29,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:29,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:14:29,394 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 17:14:29,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash 113157308, now seen corresponding path program 1 times [2024-06-21 17:14:29,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:29,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881934333] [2024-06-21 17:14:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:32,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:32,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881934333] [2024-06-21 17:14:32,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881934333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:32,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:32,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263803979] [2024-06-21 17:14:32,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:32,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:32,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:32,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 3682 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:32,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:32,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:32,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:34,834 INFO L124 PetriNetUnfolderBase]: 7706/12626 cut-off events. [2024-06-21 17:14:34,835 INFO L125 PetriNetUnfolderBase]: For 392774/392817 co-relation queries the response was YES. [2024-06-21 17:14:34,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70809 conditions, 12626 events. 7706/12626 cut-off events. For 392774/392817 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 91582 event pairs, 3704 based on Foata normal form. 39/12630 useless extension candidates. Maximal degree in co-relation 70714. Up to 12123 conditions per place. [2024-06-21 17:14:34,959 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 46 changer transitions 9/300 dead transitions. [2024-06-21 17:14:34,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 300 transitions, 4856 flow [2024-06-21 17:14:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:14:34,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:14:34,961 INFO L175 Difference]: Start difference. First operand has 191 places, 245 transitions, 3682 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:14:34,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 300 transitions, 4856 flow [2024-06-21 17:14:35,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 300 transitions, 4535 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 17:14:35,946 INFO L231 Difference]: Finished difference. Result has 192 places, 267 transitions, 3924 flow [2024-06-21 17:14:35,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3924, PETRI_PLACES=192, PETRI_TRANSITIONS=267} [2024-06-21 17:14:35,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 17:14:35,947 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 267 transitions, 3924 flow [2024-06-21 17:14:35,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:35,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:35,947 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 17:14:35,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:14:35,947 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 17:14:35,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1023973834, now seen corresponding path program 2 times [2024-06-21 17:14:35,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:35,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907984489] [2024-06-21 17:14:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:35,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:39,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907984489] [2024-06-21 17:14:39,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907984489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:39,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:39,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:39,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018258608] [2024-06-21 17:14:39,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:39,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:39,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:39,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:39,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 267 transitions, 3924 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:39,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:39,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:39,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:41,862 INFO L124 PetriNetUnfolderBase]: 7238/11756 cut-off events. [2024-06-21 17:14:41,863 INFO L125 PetriNetUnfolderBase]: For 385610/385653 co-relation queries the response was YES. [2024-06-21 17:14:41,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65560 conditions, 11756 events. 7238/11756 cut-off events. For 385610/385653 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 83444 event pairs, 3381 based on Foata normal form. 39/11763 useless extension candidates. Maximal degree in co-relation 65464. Up to 11211 conditions per place. [2024-06-21 17:14:41,975 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 201 selfloop transitions, 65 changer transitions 15/295 dead transitions. [2024-06-21 17:14:41,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 295 transitions, 4552 flow [2024-06-21 17:14:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:14:41,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 17:14:41,977 INFO L175 Difference]: Start difference. First operand has 192 places, 267 transitions, 3924 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:14:41,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 295 transitions, 4552 flow [2024-06-21 17:14:42,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 295 transitions, 4441 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 17:14:42,710 INFO L231 Difference]: Finished difference. Result has 195 places, 253 transitions, 3723 flow [2024-06-21 17:14:42,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3723, PETRI_PLACES=195, PETRI_TRANSITIONS=253} [2024-06-21 17:14:42,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 17:14:42,711 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 253 transitions, 3723 flow [2024-06-21 17:14:42,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:42,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:42,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:42,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:14:42,711 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 17:14:42,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1598606100, now seen corresponding path program 3 times [2024-06-21 17:14:42,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:42,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806776190] [2024-06-21 17:14:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:45,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:45,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806776190] [2024-06-21 17:14:45,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806776190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:45,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:45,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:45,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001904261] [2024-06-21 17:14:45,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:45,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:45,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:45,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:45,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 253 transitions, 3723 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:45,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:45,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:45,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:47,996 INFO L124 PetriNetUnfolderBase]: 6324/10232 cut-off events. [2024-06-21 17:14:47,996 INFO L125 PetriNetUnfolderBase]: For 390879/390939 co-relation queries the response was YES. [2024-06-21 17:14:48,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60657 conditions, 10232 events. 6324/10232 cut-off events. For 390879/390939 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 70200 event pairs, 2553 based on Foata normal form. 49/10249 useless extension candidates. Maximal degree in co-relation 60561. Up to 9551 conditions per place. [2024-06-21 17:14:48,098 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 84 changer transitions 0/288 dead transitions. [2024-06-21 17:14:48,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 288 transitions, 4685 flow [2024-06-21 17:14:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:14:48,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 17:14:48,100 INFO L175 Difference]: Start difference. First operand has 195 places, 253 transitions, 3723 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:14:48,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 288 transitions, 4685 flow [2024-06-21 17:14:48,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 288 transitions, 4391 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 17:14:48,803 INFO L231 Difference]: Finished difference. Result has 193 places, 264 transitions, 3858 flow [2024-06-21 17:14:48,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3858, PETRI_PLACES=193, PETRI_TRANSITIONS=264} [2024-06-21 17:14:48,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 17:14:48,804 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 264 transitions, 3858 flow [2024-06-21 17:14:48,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:48,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:48,804 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 17:14:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:14:48,805 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 17:14:48,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash 380554878, now seen corresponding path program 1 times [2024-06-21 17:14:48,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:48,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775210897] [2024-06-21 17:14:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:50,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:50,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775210897] [2024-06-21 17:14:50,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775210897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:50,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:50,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:50,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592308531] [2024-06-21 17:14:50,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:50,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:50,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:50,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:50,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:50,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 264 transitions, 3858 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:50,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:50,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:50,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:53,446 INFO L124 PetriNetUnfolderBase]: 6418/10344 cut-off events. [2024-06-21 17:14:53,447 INFO L125 PetriNetUnfolderBase]: For 370834/370836 co-relation queries the response was YES. [2024-06-21 17:14:53,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61674 conditions, 10344 events. 6418/10344 cut-off events. For 370834/370836 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 70636 event pairs, 2837 based on Foata normal form. 4/10347 useless extension candidates. Maximal degree in co-relation 61578. Up to 10037 conditions per place. [2024-06-21 17:14:53,544 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 264 selfloop transitions, 25 changer transitions 0/293 dead transitions. [2024-06-21 17:14:53,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 293 transitions, 4774 flow [2024-06-21 17:14:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:14:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:14:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:14:53,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-21 17:14:53,548 INFO L175 Difference]: Start difference. First operand has 193 places, 264 transitions, 3858 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:14:53,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 293 transitions, 4774 flow [2024-06-21 17:14:54,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 293 transitions, 4666 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-21 17:14:54,181 INFO L231 Difference]: Finished difference. Result has 198 places, 270 transitions, 3946 flow [2024-06-21 17:14:54,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3946, PETRI_PLACES=198, PETRI_TRANSITIONS=270} [2024-06-21 17:14:54,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 17:14:54,183 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 270 transitions, 3946 flow [2024-06-21 17:14:54,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:54,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:54,184 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 17:14:54,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:14:54,184 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 17:14:54,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash 417606078, now seen corresponding path program 2 times [2024-06-21 17:14:54,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:54,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246529694] [2024-06-21 17:14:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:54,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:56,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:56,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246529694] [2024-06-21 17:14:56,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246529694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:56,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:56,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:56,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030882284] [2024-06-21 17:14:56,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:56,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:56,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:56,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:56,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 270 transitions, 3946 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:56,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:56,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:56,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:58,705 INFO L124 PetriNetUnfolderBase]: 6384/10308 cut-off events. [2024-06-21 17:14:58,706 INFO L125 PetriNetUnfolderBase]: For 382189/382191 co-relation queries the response was YES. [2024-06-21 17:14:58,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61528 conditions, 10308 events. 6384/10308 cut-off events. For 382189/382191 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 70407 event pairs, 2834 based on Foata normal form. 8/10315 useless extension candidates. Maximal degree in co-relation 61429. Up to 10038 conditions per place. [2024-06-21 17:14:58,800 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 21 changer transitions 0/290 dead transitions. [2024-06-21 17:14:58,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 290 transitions, 4574 flow [2024-06-21 17:14:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:14:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:14:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 17:14:58,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 17:14:58,802 INFO L175 Difference]: Start difference. First operand has 198 places, 270 transitions, 3946 flow. Second operand 6 states and 104 transitions. [2024-06-21 17:14:58,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 290 transitions, 4574 flow [2024-06-21 17:14:59,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 290 transitions, 4472 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-06-21 17:14:59,468 INFO L231 Difference]: Finished difference. Result has 203 places, 270 transitions, 3898 flow [2024-06-21 17:14:59,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3898, PETRI_PLACES=203, PETRI_TRANSITIONS=270} [2024-06-21 17:14:59,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 17:14:59,469 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 270 transitions, 3898 flow [2024-06-21 17:14:59,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:59,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:59,469 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 17:14:59,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:14:59,469 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 17:14:59,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1599024600, now seen corresponding path program 1 times [2024-06-21 17:14:59,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:59,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576201599] [2024-06-21 17:14:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:59,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:02,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:02,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576201599] [2024-06-21 17:15:02,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576201599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:02,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:02,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:02,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519709376] [2024-06-21 17:15:02,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:02,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:02,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:02,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:02,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:02,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:02,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 270 transitions, 3898 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:02,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:02,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:02,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:04,552 INFO L124 PetriNetUnfolderBase]: 6317/10229 cut-off events. [2024-06-21 17:15:04,553 INFO L125 PetriNetUnfolderBase]: For 407575/407618 co-relation queries the response was YES. [2024-06-21 17:15:04,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61439 conditions, 10229 events. 6317/10229 cut-off events. For 407575/407618 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 70038 event pairs, 2812 based on Foata normal form. 40/10239 useless extension candidates. Maximal degree in co-relation 61337. Up to 9861 conditions per place. [2024-06-21 17:15:04,649 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 23 changer transitions 0/298 dead transitions. [2024-06-21 17:15:04,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 298 transitions, 4588 flow [2024-06-21 17:15:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:15:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:15:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:15:04,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:15:04,651 INFO L175 Difference]: Start difference. First operand has 203 places, 270 transitions, 3898 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:15:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 298 transitions, 4588 flow [2024-06-21 17:15:05,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 298 transitions, 4536 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:15:05,291 INFO L231 Difference]: Finished difference. Result has 204 places, 272 transitions, 3944 flow [2024-06-21 17:15:05,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3944, PETRI_PLACES=204, PETRI_TRANSITIONS=272} [2024-06-21 17:15:05,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 17:15:05,291 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 272 transitions, 3944 flow [2024-06-21 17:15:05,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:05,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:05,293 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 17:15:05,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:15:05,296 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 17:15:05,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash -796354709, now seen corresponding path program 1 times [2024-06-21 17:15:05,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:05,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780606543] [2024-06-21 17:15:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:05,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:08,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:08,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780606543] [2024-06-21 17:15:08,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780606543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:08,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:08,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:08,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98954138] [2024-06-21 17:15:08,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:08,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:08,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:08,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:08,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:08,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 272 transitions, 3944 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:08,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:08,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:08,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:11,215 INFO L124 PetriNetUnfolderBase]: 6433/10384 cut-off events. [2024-06-21 17:15:11,216 INFO L125 PetriNetUnfolderBase]: For 408083/408083 co-relation queries the response was YES. [2024-06-21 17:15:11,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62593 conditions, 10384 events. 6433/10384 cut-off events. For 408083/408083 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71158 event pairs, 2906 based on Foata normal form. 2/10385 useless extension candidates. Maximal degree in co-relation 62490. Up to 10147 conditions per place. [2024-06-21 17:15:11,320 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 24 changer transitions 0/311 dead transitions. [2024-06-21 17:15:11,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 311 transitions, 4742 flow [2024-06-21 17:15:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:15:11,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:15:11,330 INFO L175 Difference]: Start difference. First operand has 204 places, 272 transitions, 3944 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:15:11,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 311 transitions, 4742 flow [2024-06-21 17:15:11,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 311 transitions, 4668 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:15:11,992 INFO L231 Difference]: Finished difference. Result has 208 places, 279 transitions, 4037 flow [2024-06-21 17:15:11,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3870, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4037, PETRI_PLACES=208, PETRI_TRANSITIONS=279} [2024-06-21 17:15:11,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 17:15:11,993 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 279 transitions, 4037 flow [2024-06-21 17:15:11,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:11,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:11,993 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 17:15:11,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:15:11,993 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 17:15:11,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash -634556565, now seen corresponding path program 2 times [2024-06-21 17:15:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:11,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759220307] [2024-06-21 17:15:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:11,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:15,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:15,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759220307] [2024-06-21 17:15:15,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759220307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:15,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:15,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70174632] [2024-06-21 17:15:15,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:15,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:15,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:15,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:15,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 279 transitions, 4037 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:15,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:15,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:15,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:17,818 INFO L124 PetriNetUnfolderBase]: 6464/10433 cut-off events. [2024-06-21 17:15:17,818 INFO L125 PetriNetUnfolderBase]: For 425451/425451 co-relation queries the response was YES. [2024-06-21 17:15:17,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63304 conditions, 10433 events. 6464/10433 cut-off events. For 425451/425451 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71462 event pairs, 2899 based on Foata normal form. 2/10434 useless extension candidates. Maximal degree in co-relation 63199. Up to 10166 conditions per place. [2024-06-21 17:15:17,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 35 changer transitions 0/318 dead transitions. [2024-06-21 17:15:17,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 318 transitions, 5035 flow [2024-06-21 17:15:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:15:17,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:15:17,908 INFO L175 Difference]: Start difference. First operand has 208 places, 279 transitions, 4037 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:15:17,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 318 transitions, 5035 flow [2024-06-21 17:15:18,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 318 transitions, 4971 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 17:15:18,556 INFO L231 Difference]: Finished difference. Result has 213 places, 293 transitions, 4304 flow [2024-06-21 17:15:18,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3981, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4304, PETRI_PLACES=213, PETRI_TRANSITIONS=293} [2024-06-21 17:15:18,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 17:15:18,557 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 293 transitions, 4304 flow [2024-06-21 17:15:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:18,557 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 17:15:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:15:18,558 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 17:15:18,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash -787100279, now seen corresponding path program 3 times [2024-06-21 17:15:18,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:18,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618736992] [2024-06-21 17:15:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:18,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618736992] [2024-06-21 17:15:21,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618736992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:21,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:21,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278391921] [2024-06-21 17:15:21,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:21,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:21,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:21,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:21,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:21,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 293 transitions, 4304 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:21,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:21,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:21,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:24,492 INFO L124 PetriNetUnfolderBase]: 6458/10425 cut-off events. [2024-06-21 17:15:24,492 INFO L125 PetriNetUnfolderBase]: For 440616/440616 co-relation queries the response was YES. [2024-06-21 17:15:24,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63696 conditions, 10425 events. 6458/10425 cut-off events. For 440616/440616 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71413 event pairs, 2900 based on Foata normal form. 2/10426 useless extension candidates. Maximal degree in co-relation 63588. Up to 10161 conditions per place. [2024-06-21 17:15:24,599 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 280 selfloop transitions, 36 changer transitions 0/320 dead transitions. [2024-06-21 17:15:24,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 320 transitions, 5004 flow [2024-06-21 17:15:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-21 17:15:24,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 17:15:24,601 INFO L175 Difference]: Start difference. First operand has 213 places, 293 transitions, 4304 flow. Second operand 10 states and 150 transitions. [2024-06-21 17:15:24,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 320 transitions, 5004 flow [2024-06-21 17:15:25,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 320 transitions, 4975 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 17:15:25,421 INFO L231 Difference]: Finished difference. Result has 221 places, 293 transitions, 4353 flow [2024-06-21 17:15:25,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4353, PETRI_PLACES=221, PETRI_TRANSITIONS=293} [2024-06-21 17:15:25,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 17:15:25,422 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 293 transitions, 4353 flow [2024-06-21 17:15:25,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:25,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:25,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:25,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:15:25,422 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 17:15:25,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1970304603, now seen corresponding path program 4 times [2024-06-21 17:15:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:25,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022291990] [2024-06-21 17:15:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:25,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:28,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022291990] [2024-06-21 17:15:28,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022291990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:28,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:28,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:28,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927861358] [2024-06-21 17:15:28,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:28,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:28,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:28,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:28,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:28,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:28,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 293 transitions, 4353 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:28,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:28,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:28,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:31,401 INFO L124 PetriNetUnfolderBase]: 6452/10415 cut-off events. [2024-06-21 17:15:31,401 INFO L125 PetriNetUnfolderBase]: For 455688/455688 co-relation queries the response was YES. [2024-06-21 17:15:31,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64038 conditions, 10415 events. 6452/10415 cut-off events. For 455688/455688 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71294 event pairs, 2855 based on Foata normal form. 2/10415 useless extension candidates. Maximal degree in co-relation 63928. Up to 10112 conditions per place. [2024-06-21 17:15:31,492 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 275 selfloop transitions, 44 changer transitions 0/323 dead transitions. [2024-06-21 17:15:31,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 323 transitions, 5293 flow [2024-06-21 17:15:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:15:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:15:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 17:15:31,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 17:15:31,494 INFO L175 Difference]: Start difference. First operand has 221 places, 293 transitions, 4353 flow. Second operand 7 states and 110 transitions. [2024-06-21 17:15:31,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 323 transitions, 5293 flow [2024-06-21 17:15:32,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 323 transitions, 5213 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:32,157 INFO L231 Difference]: Finished difference. Result has 223 places, 305 transitions, 4563 flow [2024-06-21 17:15:32,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4563, PETRI_PLACES=223, PETRI_TRANSITIONS=305} [2024-06-21 17:15:32,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 17:15:32,158 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 305 transitions, 4563 flow [2024-06-21 17:15:32,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:32,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:32,158 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 17:15:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:15:32,158 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 17:15:32,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1678416153, now seen corresponding path program 5 times [2024-06-21 17:15:32,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:32,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279084533] [2024-06-21 17:15:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:35,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279084533] [2024-06-21 17:15:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279084533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:35,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:35,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:35,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574668597] [2024-06-21 17:15:35,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:35,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:35,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:35,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:35,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:35,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 305 transitions, 4563 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:35,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:35,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:35,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:37,774 INFO L124 PetriNetUnfolderBase]: 6462/10431 cut-off events. [2024-06-21 17:15:37,775 INFO L125 PetriNetUnfolderBase]: For 474923/474923 co-relation queries the response was YES. [2024-06-21 17:15:37,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65859 conditions, 10431 events. 6462/10431 cut-off events. For 474923/474923 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71456 event pairs, 2899 based on Foata normal form. 2/10432 useless extension candidates. Maximal degree in co-relation 65746. Up to 10144 conditions per place. [2024-06-21 17:15:37,880 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 287 selfloop transitions, 42 changer transitions 0/333 dead transitions. [2024-06-21 17:15:37,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 333 transitions, 5459 flow [2024-06-21 17:15:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:15:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:15:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:15:37,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:15:37,881 INFO L175 Difference]: Start difference. First operand has 223 places, 305 transitions, 4563 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:15:37,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 333 transitions, 5459 flow [2024-06-21 17:15:38,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 333 transitions, 5379 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 17:15:38,613 INFO L231 Difference]: Finished difference. Result has 228 places, 309 transitions, 4681 flow [2024-06-21 17:15:38,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4681, PETRI_PLACES=228, PETRI_TRANSITIONS=309} [2024-06-21 17:15:38,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 17:15:38,614 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 309 transitions, 4681 flow [2024-06-21 17:15:38,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:38,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:38,614 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 17:15:38,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:15:38,615 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 17:15:38,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:38,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1983202773, now seen corresponding path program 6 times [2024-06-21 17:15:38,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:38,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201169827] [2024-06-21 17:15:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:41,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:41,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201169827] [2024-06-21 17:15:41,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201169827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:41,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:41,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:41,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641896131] [2024-06-21 17:15:41,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:41,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:41,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:41,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:41,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:41,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 309 transitions, 4681 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:41,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:41,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:41,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:44,371 INFO L124 PetriNetUnfolderBase]: 6456/10423 cut-off events. [2024-06-21 17:15:44,371 INFO L125 PetriNetUnfolderBase]: For 490409/490409 co-relation queries the response was YES. [2024-06-21 17:15:44,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66131 conditions, 10423 events. 6456/10423 cut-off events. For 490409/490409 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71367 event pairs, 2896 based on Foata normal form. 2/10424 useless extension candidates. Maximal degree in co-relation 66016. Up to 10139 conditions per place. [2024-06-21 17:15:44,483 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 294 selfloop transitions, 45 changer transitions 0/343 dead transitions. [2024-06-21 17:15:44,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 343 transitions, 5445 flow [2024-06-21 17:15:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:15:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:15:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:15:44,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 17:15:44,485 INFO L175 Difference]: Start difference. First operand has 228 places, 309 transitions, 4681 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:15:44,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 343 transitions, 5445 flow [2024-06-21 17:15:45,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 343 transitions, 5363 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:15:45,400 INFO L231 Difference]: Finished difference. Result has 232 places, 309 transitions, 4703 flow [2024-06-21 17:15:45,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4703, PETRI_PLACES=232, PETRI_TRANSITIONS=309} [2024-06-21 17:15:45,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 17:15:45,401 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 309 transitions, 4703 flow [2024-06-21 17:15:45,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:45,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:45,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:45,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:15:45,401 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 17:15:45,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash 411016113, now seen corresponding path program 1 times [2024-06-21 17:15:45,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:45,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900440920] [2024-06-21 17:15:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:45,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:47,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:47,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900440920] [2024-06-21 17:15:47,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900440920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:47,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:47,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:47,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953505673] [2024-06-21 17:15:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:47,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:47,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:47,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:47,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 309 transitions, 4703 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:47,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:47,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:47,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:50,660 INFO L124 PetriNetUnfolderBase]: 6444/10408 cut-off events. [2024-06-21 17:15:50,661 INFO L125 PetriNetUnfolderBase]: For 487848/487850 co-relation queries the response was YES. [2024-06-21 17:15:50,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65874 conditions, 10408 events. 6444/10408 cut-off events. For 487848/487850 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71057 event pairs, 2832 based on Foata normal form. 6/10413 useless extension candidates. Maximal degree in co-relation 65759. Up to 10106 conditions per place. [2024-06-21 17:15:50,781 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 301 selfloop transitions, 27 changer transitions 0/332 dead transitions. [2024-06-21 17:15:50,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 332 transitions, 5411 flow [2024-06-21 17:15:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:15:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:15:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:15:50,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:15:50,805 INFO L175 Difference]: Start difference. First operand has 232 places, 309 transitions, 4703 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:15:50,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 332 transitions, 5411 flow [2024-06-21 17:15:51,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 332 transitions, 5301 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:51,494 INFO L231 Difference]: Finished difference. Result has 231 places, 309 transitions, 4653 flow [2024-06-21 17:15:51,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4653, PETRI_PLACES=231, PETRI_TRANSITIONS=309} [2024-06-21 17:15:51,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 17:15:51,495 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 309 transitions, 4653 flow [2024-06-21 17:15:51,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:51,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:51,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:51,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:15:51,496 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 17:15:51,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1192557889, now seen corresponding path program 1 times [2024-06-21 17:15:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:51,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957840577] [2024-06-21 17:15:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:54,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:54,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957840577] [2024-06-21 17:15:54,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957840577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:54,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:54,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:54,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119647237] [2024-06-21 17:15:54,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:54,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:54,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:54,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:54,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:54,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 309 transitions, 4653 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:54,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:54,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:54,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:57,429 INFO L124 PetriNetUnfolderBase]: 6534/10502 cut-off events. [2024-06-21 17:15:57,430 INFO L125 PetriNetUnfolderBase]: For 497558/497560 co-relation queries the response was YES. [2024-06-21 17:15:57,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67201 conditions, 10502 events. 6534/10502 cut-off events. For 497558/497560 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71672 event pairs, 2883 based on Foata normal form. 4/10505 useless extension candidates. Maximal degree in co-relation 67086. Up to 10016 conditions per place. [2024-06-21 17:15:57,551 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 79 changer transitions 0/363 dead transitions. [2024-06-21 17:15:57,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 363 transitions, 5901 flow [2024-06-21 17:15:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 17:15:57,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 17:15:57,553 INFO L175 Difference]: Start difference. First operand has 231 places, 309 transitions, 4653 flow. Second operand 10 states and 171 transitions. [2024-06-21 17:15:57,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 363 transitions, 5901 flow [2024-06-21 17:15:58,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 363 transitions, 5817 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:15:58,420 INFO L231 Difference]: Finished difference. Result has 235 places, 318 transitions, 4915 flow [2024-06-21 17:15:58,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4569, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4915, PETRI_PLACES=235, PETRI_TRANSITIONS=318} [2024-06-21 17:15:58,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 17:15:58,421 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 318 transitions, 4915 flow [2024-06-21 17:15:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:58,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:58,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:58,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:15:58,422 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 17:15:58,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:58,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1906890709, now seen corresponding path program 1 times [2024-06-21 17:15:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:58,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26738291] [2024-06-21 17:15:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:58,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:02,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:02,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26738291] [2024-06-21 17:16:02,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26738291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:02,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:02,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:02,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657159756] [2024-06-21 17:16:02,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:02,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:02,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:02,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:02,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:02,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 318 transitions, 4915 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:02,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:02,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:02,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:05,498 INFO L124 PetriNetUnfolderBase]: 6502/10486 cut-off events. [2024-06-21 17:16:05,499 INFO L125 PetriNetUnfolderBase]: For 546943/546974 co-relation queries the response was YES. [2024-06-21 17:16:05,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69075 conditions, 10486 events. 6502/10486 cut-off events. For 546943/546974 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 71909 event pairs, 2888 based on Foata normal form. 28/10486 useless extension candidates. Maximal degree in co-relation 68960. Up to 10047 conditions per place. [2024-06-21 17:16:05,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 51 changer transitions 0/351 dead transitions. [2024-06-21 17:16:05,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 351 transitions, 5715 flow [2024-06-21 17:16:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:16:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:16:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 17:16:05,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 17:16:05,605 INFO L175 Difference]: Start difference. First operand has 235 places, 318 transitions, 4915 flow. Second operand 9 states and 149 transitions. [2024-06-21 17:16:05,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 351 transitions, 5715 flow [2024-06-21 17:16:06,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 351 transitions, 5565 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 17:16:06,652 INFO L231 Difference]: Finished difference. Result has 239 places, 320 transitions, 4931 flow [2024-06-21 17:16:06,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4931, PETRI_PLACES=239, PETRI_TRANSITIONS=320} [2024-06-21 17:16:06,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 17:16:06,653 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 320 transitions, 4931 flow [2024-06-21 17:16:06,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:06,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:06,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:06,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:16:06,653 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:06,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:06,654 INFO L85 PathProgramCache]: Analyzing trace with hash -382743231, now seen corresponding path program 2 times [2024-06-21 17:16:06,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:06,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274262307] [2024-06-21 17:16:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:09,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:09,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274262307] [2024-06-21 17:16:09,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274262307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:09,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:09,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820762628] [2024-06-21 17:16:09,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:09,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:09,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:09,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:09,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:09,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 320 transitions, 4931 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:09,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:09,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:09,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:12,351 INFO L124 PetriNetUnfolderBase]: 6588/10582 cut-off events. [2024-06-21 17:16:12,351 INFO L125 PetriNetUnfolderBase]: For 542611/542613 co-relation queries the response was YES. [2024-06-21 17:16:12,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69869 conditions, 10582 events. 6588/10582 cut-off events. For 542611/542613 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 72130 event pairs, 2874 based on Foata normal form. 4/10585 useless extension candidates. Maximal degree in co-relation 69752. Up to 10105 conditions per place. [2024-06-21 17:16:12,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 81 changer transitions 0/353 dead transitions. [2024-06-21 17:16:12,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 353 transitions, 5887 flow [2024-06-21 17:16:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:16:12,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:16:12,452 INFO L175 Difference]: Start difference. First operand has 239 places, 320 transitions, 4931 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:16:12,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 353 transitions, 5887 flow [2024-06-21 17:16:13,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 353 transitions, 5787 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:16:13,126 INFO L231 Difference]: Finished difference. Result has 242 places, 323 transitions, 5093 flow [2024-06-21 17:16:13,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5093, PETRI_PLACES=242, PETRI_TRANSITIONS=323} [2024-06-21 17:16:13,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 17:16:13,127 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 323 transitions, 5093 flow [2024-06-21 17:16:13,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:13,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:13,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:13,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:16:13,127 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:13,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:13,128 INFO L85 PathProgramCache]: Analyzing trace with hash 402573417, now seen corresponding path program 3 times [2024-06-21 17:16:13,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:13,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386616192] [2024-06-21 17:16:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:13,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:16,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386616192] [2024-06-21 17:16:16,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386616192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:16,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:16,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727078889] [2024-06-21 17:16:16,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:16,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:16,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:16,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 323 transitions, 5093 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:16,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:16,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:16,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:19,205 INFO L124 PetriNetUnfolderBase]: 6630/10678 cut-off events. [2024-06-21 17:16:19,205 INFO L125 PetriNetUnfolderBase]: For 574163/574188 co-relation queries the response was YES. [2024-06-21 17:16:19,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71018 conditions, 10678 events. 6630/10678 cut-off events. For 574163/574188 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 72892 event pairs, 2636 based on Foata normal form. 27/10704 useless extension candidates. Maximal degree in co-relation 70900. Up to 9849 conditions per place. [2024-06-21 17:16:19,315 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 110 changer transitions 0/365 dead transitions. [2024-06-21 17:16:19,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 365 transitions, 6480 flow [2024-06-21 17:16:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:16:19,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:16:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:16:19,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 17:16:19,317 INFO L175 Difference]: Start difference. First operand has 242 places, 323 transitions, 5093 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:16:19,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 365 transitions, 6480 flow [2024-06-21 17:16:20,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 365 transitions, 6272 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 17:16:20,133 INFO L231 Difference]: Finished difference. Result has 245 places, 335 transitions, 5489 flow [2024-06-21 17:16:20,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5489, PETRI_PLACES=245, PETRI_TRANSITIONS=335} [2024-06-21 17:16:20,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 17:16:20,133 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 335 transitions, 5489 flow [2024-06-21 17:16:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:20,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:20,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:16:20,134 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:20,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:20,136 INFO L85 PathProgramCache]: Analyzing trace with hash 641067773, now seen corresponding path program 4 times [2024-06-21 17:16:20,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:20,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705940760] [2024-06-21 17:16:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:20,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:23,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:23,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705940760] [2024-06-21 17:16:23,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705940760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:23,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:23,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:23,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88427320] [2024-06-21 17:16:23,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:23,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:23,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:23,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:23,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 335 transitions, 5489 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:23,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:23,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:23,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:26,243 INFO L124 PetriNetUnfolderBase]: 6624/10670 cut-off events. [2024-06-21 17:16:26,244 INFO L125 PetriNetUnfolderBase]: For 580578/580603 co-relation queries the response was YES. [2024-06-21 17:16:26,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72377 conditions, 10670 events. 6624/10670 cut-off events. For 580578/580603 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 72941 event pairs, 2645 based on Foata normal form. 27/10696 useless extension candidates. Maximal degree in co-relation 72257. Up to 9846 conditions per place. [2024-06-21 17:16:26,364 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 111 changer transitions 0/359 dead transitions. [2024-06-21 17:16:26,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 359 transitions, 6457 flow [2024-06-21 17:16:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:16:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:16:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:16:26,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 17:16:26,366 INFO L175 Difference]: Start difference. First operand has 245 places, 335 transitions, 5489 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:16:26,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 359 transitions, 6457 flow [2024-06-21 17:16:27,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 359 transitions, 6319 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-21 17:16:27,454 INFO L231 Difference]: Finished difference. Result has 250 places, 335 transitions, 5579 flow [2024-06-21 17:16:27,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5351, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5579, PETRI_PLACES=250, PETRI_TRANSITIONS=335} [2024-06-21 17:16:27,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 17:16:27,455 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 335 transitions, 5579 flow [2024-06-21 17:16:27,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:27,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:27,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:27,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:16:27,455 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 17:16:27,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:27,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1887532605, now seen corresponding path program 5 times [2024-06-21 17:16:27,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:27,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995618741] [2024-06-21 17:16:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:27,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:30,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:30,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995618741] [2024-06-21 17:16:30,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995618741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:30,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:30,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:30,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330893938] [2024-06-21 17:16:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:30,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:30,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:30,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:30,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 335 transitions, 5579 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:30,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:30,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:30,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:33,052 INFO L124 PetriNetUnfolderBase]: 6606/10644 cut-off events. [2024-06-21 17:16:33,052 INFO L125 PetriNetUnfolderBase]: For 594095/594120 co-relation queries the response was YES. [2024-06-21 17:16:33,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72025 conditions, 10644 events. 6606/10644 cut-off events. For 594095/594120 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 72721 event pairs, 2566 based on Foata normal form. 31/10674 useless extension candidates. Maximal degree in co-relation 71903. Up to 9975 conditions per place. [2024-06-21 17:16:33,168 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 95 changer transitions 0/363 dead transitions. [2024-06-21 17:16:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 363 transitions, 6569 flow [2024-06-21 17:16:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:16:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:16:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:16:33,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 17:16:33,176 INFO L175 Difference]: Start difference. First operand has 250 places, 335 transitions, 5579 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:16:33,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 363 transitions, 6569 flow [2024-06-21 17:16:34,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 363 transitions, 6225 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 17:16:34,318 INFO L231 Difference]: Finished difference. Result has 252 places, 335 transitions, 5436 flow [2024-06-21 17:16:34,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5235, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5436, PETRI_PLACES=252, PETRI_TRANSITIONS=335} [2024-06-21 17:16:34,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 17:16:34,318 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 335 transitions, 5436 flow [2024-06-21 17:16:34,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:34,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:34,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:34,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:16:34,319 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 17:16:34,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash -949482373, now seen corresponding path program 2 times [2024-06-21 17:16:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:34,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100312674] [2024-06-21 17:16:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:34,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:38,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:38,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100312674] [2024-06-21 17:16:38,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100312674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:38,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:38,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:38,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347137412] [2024-06-21 17:16:38,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:38,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:38,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:38,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:38,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 335 transitions, 5436 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:38,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:38,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:38,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:40,855 INFO L124 PetriNetUnfolderBase]: 6573/10615 cut-off events. [2024-06-21 17:16:40,855 INFO L125 PetriNetUnfolderBase]: For 635314/635365 co-relation queries the response was YES. [2024-06-21 17:16:40,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72075 conditions, 10615 events. 6573/10615 cut-off events. For 635314/635365 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 72820 event pairs, 2551 based on Foata normal form. 48/10633 useless extension candidates. Maximal degree in co-relation 71953. Up to 9847 conditions per place. [2024-06-21 17:16:40,986 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 97 changer transitions 0/368 dead transitions. [2024-06-21 17:16:40,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 368 transitions, 6488 flow [2024-06-21 17:16:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:16:40,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:16:40,987 INFO L175 Difference]: Start difference. First operand has 252 places, 335 transitions, 5436 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:16:40,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 368 transitions, 6488 flow [2024-06-21 17:16:42,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 368 transitions, 6202 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:16:42,067 INFO L231 Difference]: Finished difference. Result has 252 places, 337 transitions, 5411 flow [2024-06-21 17:16:42,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5411, PETRI_PLACES=252, PETRI_TRANSITIONS=337} [2024-06-21 17:16:42,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 17:16:42,068 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 337 transitions, 5411 flow [2024-06-21 17:16:42,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:42,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:42,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:42,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:16:42,069 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:42,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:42,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1349383303, now seen corresponding path program 3 times [2024-06-21 17:16:42,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:42,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123349498] [2024-06-21 17:16:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:42,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:46,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:46,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123349498] [2024-06-21 17:16:46,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123349498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:46,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:46,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:46,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518739462] [2024-06-21 17:16:46,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:46,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:46,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:46,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:46,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:46,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 337 transitions, 5411 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:46,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:46,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:46,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:49,116 INFO L124 PetriNetUnfolderBase]: 6624/10664 cut-off events. [2024-06-21 17:16:49,116 INFO L125 PetriNetUnfolderBase]: For 659880/659911 co-relation queries the response was YES. [2024-06-21 17:16:49,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73152 conditions, 10664 events. 6624/10664 cut-off events. For 659880/659911 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 73120 event pairs, 2881 based on Foata normal form. 28/10664 useless extension candidates. Maximal degree in co-relation 73029. Up to 10059 conditions per place. [2024-06-21 17:16:49,248 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 73 changer transitions 0/373 dead transitions. [2024-06-21 17:16:49,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 373 transitions, 6275 flow [2024-06-21 17:16:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:16:49,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:16:49,250 INFO L175 Difference]: Start difference. First operand has 252 places, 337 transitions, 5411 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:16:49,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 373 transitions, 6275 flow [2024-06-21 17:16:50,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 373 transitions, 6042 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:16:50,358 INFO L231 Difference]: Finished difference. Result has 254 places, 339 transitions, 5406 flow [2024-06-21 17:16:50,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5178, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5406, PETRI_PLACES=254, PETRI_TRANSITIONS=339} [2024-06-21 17:16:50,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 17:16:50,359 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 339 transitions, 5406 flow [2024-06-21 17:16:50,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:50,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:50,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:50,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:16:50,359 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:50,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash -935601193, now seen corresponding path program 4 times [2024-06-21 17:16:50,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:50,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266800721] [2024-06-21 17:16:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:50,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:54,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:54,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266800721] [2024-06-21 17:16:54,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266800721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:54,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:54,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155938182] [2024-06-21 17:16:54,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:54,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:54,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:54,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 339 transitions, 5406 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:54,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:54,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:54,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:57,265 INFO L124 PetriNetUnfolderBase]: 6736/10864 cut-off events. [2024-06-21 17:16:57,265 INFO L125 PetriNetUnfolderBase]: For 693431/693482 co-relation queries the response was YES. [2024-06-21 17:16:57,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74924 conditions, 10864 events. 6736/10864 cut-off events. For 693431/693482 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 74652 event pairs, 2560 based on Foata normal form. 48/10882 useless extension candidates. Maximal degree in co-relation 74800. Up to 9716 conditions per place. [2024-06-21 17:16:57,372 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 104 changer transitions 0/378 dead transitions. [2024-06-21 17:16:57,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 378 transitions, 6670 flow [2024-06-21 17:16:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:16:57,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:16:57,373 INFO L175 Difference]: Start difference. First operand has 254 places, 339 transitions, 5406 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:16:57,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 378 transitions, 6670 flow [2024-06-21 17:16:58,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 378 transitions, 6481 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 17:16:58,507 INFO L231 Difference]: Finished difference. Result has 255 places, 342 transitions, 5524 flow [2024-06-21 17:16:58,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5217, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5524, PETRI_PLACES=255, PETRI_TRANSITIONS=342} [2024-06-21 17:16:58,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 17:16:58,509 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 342 transitions, 5524 flow [2024-06-21 17:16:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:58,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:58,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:58,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:16:58,510 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:58,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:58,510 INFO L85 PathProgramCache]: Analyzing trace with hash -146262273, now seen corresponding path program 1 times [2024-06-21 17:16:58,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:58,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121503940] [2024-06-21 17:16:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:01,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:01,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121503940] [2024-06-21 17:17:01,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121503940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:01,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:01,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:01,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830142692] [2024-06-21 17:17:01,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:01,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:01,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:01,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:01,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:01,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:01,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 342 transitions, 5524 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 17:17:01,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:01,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:01,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:04,153 INFO L124 PetriNetUnfolderBase]: 6912/11100 cut-off events. [2024-06-21 17:17:04,153 INFO L125 PetriNetUnfolderBase]: For 708758/708760 co-relation queries the response was YES. [2024-06-21 17:17:04,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77362 conditions, 11100 events. 6912/11100 cut-off events. For 708758/708760 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 75950 event pairs, 2887 based on Foata normal form. 4/11103 useless extension candidates. Maximal degree in co-relation 77237. Up to 10685 conditions per place. [2024-06-21 17:17:04,283 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 342 selfloop transitions, 32 changer transitions 0/378 dead transitions. [2024-06-21 17:17:04,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 378 transitions, 6626 flow [2024-06-21 17:17:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:17:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:17:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:17:04,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:17:04,285 INFO L175 Difference]: Start difference. First operand has 255 places, 342 transitions, 5524 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:17:04,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 378 transitions, 6626 flow [2024-06-21 17:17:05,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 378 transitions, 6454 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 17:17:05,554 INFO L231 Difference]: Finished difference. Result has 258 places, 346 transitions, 5565 flow [2024-06-21 17:17:05,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5352, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5565, PETRI_PLACES=258, PETRI_TRANSITIONS=346} [2024-06-21 17:17:05,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 17:17:05,555 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 346 transitions, 5565 flow [2024-06-21 17:17:05,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 17:17:05,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:05,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:05,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:17:05,555 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:05,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 638280191, now seen corresponding path program 2 times [2024-06-21 17:17:05,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:05,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143888986] [2024-06-21 17:17:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:05,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143888986] [2024-06-21 17:17:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143888986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:08,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:08,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:08,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75822741] [2024-06-21 17:17:08,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:08,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:08,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:08,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:08,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:08,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:08,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 346 transitions, 5565 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 17:17:08,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:08,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:08,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:11,442 INFO L124 PetriNetUnfolderBase]: 6920/11112 cut-off events. [2024-06-21 17:17:11,443 INFO L125 PetriNetUnfolderBase]: For 728362/728364 co-relation queries the response was YES. [2024-06-21 17:17:11,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77774 conditions, 11112 events. 6920/11112 cut-off events. For 728362/728364 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 76056 event pairs, 2923 based on Foata normal form. 4/11115 useless extension candidates. Maximal degree in co-relation 77647. Up to 10812 conditions per place. [2024-06-21 17:17:11,571 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 337 selfloop transitions, 29 changer transitions 0/370 dead transitions. [2024-06-21 17:17:11,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 370 transitions, 6421 flow [2024-06-21 17:17:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:17:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:17:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:17:11,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:17:11,573 INFO L175 Difference]: Start difference. First operand has 258 places, 346 transitions, 5565 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:17:11,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 370 transitions, 6421 flow [2024-06-21 17:17:13,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 370 transitions, 6311 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 17:17:13,174 INFO L231 Difference]: Finished difference. Result has 262 places, 348 transitions, 5596 flow [2024-06-21 17:17:13,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5596, PETRI_PLACES=262, PETRI_TRANSITIONS=348} [2024-06-21 17:17:13,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 17:17:13,175 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 348 transitions, 5596 flow [2024-06-21 17:17:13,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 17:17:13,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:13,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:13,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:17:13,175 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:13,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1887541533, now seen corresponding path program 3 times [2024-06-21 17:17:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:13,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488883900] [2024-06-21 17:17:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:13,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:16,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:16,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488883900] [2024-06-21 17:17:16,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488883900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:16,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:16,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:16,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744868795] [2024-06-21 17:17:16,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:16,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:16,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:16,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:16,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:16,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 348 transitions, 5596 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:16,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:16,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:16,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:19,212 INFO L124 PetriNetUnfolderBase]: 6887/11065 cut-off events. [2024-06-21 17:17:19,212 INFO L125 PetriNetUnfolderBase]: For 747805/747807 co-relation queries the response was YES. [2024-06-21 17:17:19,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77090 conditions, 11065 events. 6887/11065 cut-off events. For 747805/747807 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 75688 event pairs, 2862 based on Foata normal form. 16/11080 useless extension candidates. Maximal degree in co-relation 76961. Up to 10715 conditions per place. [2024-06-21 17:17:19,328 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 347 selfloop transitions, 27 changer transitions 0/378 dead transitions. [2024-06-21 17:17:19,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 378 transitions, 6442 flow [2024-06-21 17:17:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:17:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:17:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:17:19,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 17:17:19,330 INFO L175 Difference]: Start difference. First operand has 262 places, 348 transitions, 5596 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:17:19,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 378 transitions, 6442 flow [2024-06-21 17:17:20,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 378 transitions, 6277 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 17:17:20,643 INFO L231 Difference]: Finished difference. Result has 264 places, 348 transitions, 5494 flow [2024-06-21 17:17:20,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5494, PETRI_PLACES=264, PETRI_TRANSITIONS=348} [2024-06-21 17:17:20,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 17:17:20,644 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 348 transitions, 5494 flow [2024-06-21 17:17:20,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:20,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:20,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:20,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:17:20,645 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 17:17:20,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:20,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1058667220, now seen corresponding path program 1 times [2024-06-21 17:17:20,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:20,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962668032] [2024-06-21 17:17:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:20,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:23,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:23,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962668032] [2024-06-21 17:17:23,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962668032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:23,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:23,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:23,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140217698] [2024-06-21 17:17:23,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:23,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:23,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:23,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:23,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 348 transitions, 5494 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:23,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:23,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:23,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:27,350 INFO L124 PetriNetUnfolderBase]: 6915/11108 cut-off events. [2024-06-21 17:17:27,350 INFO L125 PetriNetUnfolderBase]: For 757498/757498 co-relation queries the response was YES. [2024-06-21 17:17:27,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77466 conditions, 11108 events. 6915/11108 cut-off events. For 757498/757498 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 75839 event pairs, 2790 based on Foata normal form. 8/11115 useless extension candidates. Maximal degree in co-relation 77336. Up to 10790 conditions per place. [2024-06-21 17:17:27,464 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 358 selfloop transitions, 30 changer transitions 0/392 dead transitions. [2024-06-21 17:17:27,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 392 transitions, 6430 flow [2024-06-21 17:17:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:17:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:17:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 17:17:27,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 17:17:27,465 INFO L175 Difference]: Start difference. First operand has 264 places, 348 transitions, 5494 flow. Second operand 9 states and 149 transitions. [2024-06-21 17:17:27,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 392 transitions, 6430 flow [2024-06-21 17:17:28,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 392 transitions, 6369 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:28,831 INFO L231 Difference]: Finished difference. Result has 268 places, 351 transitions, 5554 flow [2024-06-21 17:17:28,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5554, PETRI_PLACES=268, PETRI_TRANSITIONS=351} [2024-06-21 17:17:28,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 17:17:28,832 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 351 transitions, 5554 flow [2024-06-21 17:17:28,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:28,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:28,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:28,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:17:28,833 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 17:17:28,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1051257910, now seen corresponding path program 2 times [2024-06-21 17:17:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:28,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560338126] [2024-06-21 17:17:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:32,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560338126] [2024-06-21 17:17:32,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560338126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:32,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:32,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092994079] [2024-06-21 17:17:32,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:32,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:32,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:32,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 351 transitions, 5554 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:32,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:32,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:32,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:35,503 INFO L124 PetriNetUnfolderBase]: 7010/11253 cut-off events. [2024-06-21 17:17:35,504 INFO L125 PetriNetUnfolderBase]: For 798290/798290 co-relation queries the response was YES. [2024-06-21 17:17:35,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79100 conditions, 11253 events. 7010/11253 cut-off events. For 798290/798290 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 77211 event pairs, 3029 based on Foata normal form. 8/11260 useless extension candidates. Maximal degree in co-relation 78968. Up to 10914 conditions per place. [2024-06-21 17:17:35,614 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 32 changer transitions 0/398 dead transitions. [2024-06-21 17:17:35,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 398 transitions, 6644 flow [2024-06-21 17:17:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:17:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:17:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 17:17:35,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 17:17:35,616 INFO L175 Difference]: Start difference. First operand has 268 places, 351 transitions, 5554 flow. Second operand 10 states and 161 transitions. [2024-06-21 17:17:35,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 398 transitions, 6644 flow [2024-06-21 17:17:37,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 398 transitions, 6550 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:37,086 INFO L231 Difference]: Finished difference. Result has 273 places, 355 transitions, 5584 flow [2024-06-21 17:17:37,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5464, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5584, PETRI_PLACES=273, PETRI_TRANSITIONS=355} [2024-06-21 17:17:37,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 17:17:37,087 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 355 transitions, 5584 flow [2024-06-21 17:17:37,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:37,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:37,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:37,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:17:37,088 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 17:17:37,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:37,088 INFO L85 PathProgramCache]: Analyzing trace with hash -792643510, now seen corresponding path program 3 times [2024-06-21 17:17:37,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:37,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526876909] [2024-06-21 17:17:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:37,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526876909] [2024-06-21 17:17:40,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526876909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:40,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:40,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:40,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751373939] [2024-06-21 17:17:40,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:40,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:40,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:40,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:40,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 355 transitions, 5584 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:40,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:40,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:40,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:44,358 INFO L124 PetriNetUnfolderBase]: 6987/11220 cut-off events. [2024-06-21 17:17:44,359 INFO L125 PetriNetUnfolderBase]: For 806521/806521 co-relation queries the response was YES. [2024-06-21 17:17:44,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78732 conditions, 11220 events. 6987/11220 cut-off events. For 806521/806521 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 76948 event pairs, 3045 based on Foata normal form. 10/11229 useless extension candidates. Maximal degree in co-relation 78598. Up to 10942 conditions per place. [2024-06-21 17:17:44,463 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 29 changer transitions 0/392 dead transitions. [2024-06-21 17:17:44,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 392 transitions, 6474 flow [2024-06-21 17:17:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:17:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:17:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 17:17:44,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 17:17:44,465 INFO L175 Difference]: Start difference. First operand has 273 places, 355 transitions, 5584 flow. Second operand 9 states and 146 transitions. [2024-06-21 17:17:44,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 392 transitions, 6474 flow [2024-06-21 17:17:45,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 392 transitions, 6440 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 17:17:45,852 INFO L231 Difference]: Finished difference. Result has 277 places, 355 transitions, 5613 flow [2024-06-21 17:17:45,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5613, PETRI_PLACES=277, PETRI_TRANSITIONS=355} [2024-06-21 17:17:45,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 17:17:45,853 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 355 transitions, 5613 flow [2024-06-21 17:17:45,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:45,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:45,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:45,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:17:45,853 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 17:17:45,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:45,854 INFO L85 PathProgramCache]: Analyzing trace with hash -970129360, now seen corresponding path program 1 times [2024-06-21 17:17:45,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:45,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694873669] [2024-06-21 17:17:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:45,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:48,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:48,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694873669] [2024-06-21 17:17:48,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694873669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:48,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:48,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:48,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970368700] [2024-06-21 17:17:48,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:48,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:48,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:48,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:48,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:48,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:48,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 355 transitions, 5613 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:48,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:48,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:48,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:52,265 INFO L124 PetriNetUnfolderBase]: 7077/11351 cut-off events. [2024-06-21 17:17:52,266 INFO L125 PetriNetUnfolderBase]: For 833484/833486 co-relation queries the response was YES. [2024-06-21 17:17:52,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80760 conditions, 11351 events. 7077/11351 cut-off events. For 833484/833486 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 77648 event pairs, 2848 based on Foata normal form. 4/11354 useless extension candidates. Maximal degree in co-relation 80624. Up to 10164 conditions per place. [2024-06-21 17:17:52,418 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 261 selfloop transitions, 161 changer transitions 0/426 dead transitions. [2024-06-21 17:17:52,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 426 transitions, 7211 flow [2024-06-21 17:17:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:17:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:17:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-21 17:17:52,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:17:52,419 INFO L175 Difference]: Start difference. First operand has 277 places, 355 transitions, 5613 flow. Second operand 12 states and 217 transitions. [2024-06-21 17:17:52,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 426 transitions, 7211 flow [2024-06-21 17:17:54,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 426 transitions, 7158 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:54,242 INFO L231 Difference]: Finished difference. Result has 283 places, 364 transitions, 6078 flow [2024-06-21 17:17:54,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6078, PETRI_PLACES=283, PETRI_TRANSITIONS=364} [2024-06-21 17:17:54,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 17:17:54,242 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 364 transitions, 6078 flow [2024-06-21 17:17:54,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:54,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:54,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:54,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:17:54,243 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 17:17:54,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1507991342, now seen corresponding path program 1 times [2024-06-21 17:17:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:54,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110049365] [2024-06-21 17:17:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:57,771 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 17:17:57,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:57,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110049365] [2024-06-21 17:17:57,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110049365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:57,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:57,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527710806] [2024-06-21 17:17:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:57,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:57,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:57,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:57,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 364 transitions, 6078 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:17:57,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:57,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:57,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:01,172 INFO L124 PetriNetUnfolderBase]: 7142/11444 cut-off events. [2024-06-21 17:18:01,172 INFO L125 PetriNetUnfolderBase]: For 881541/881543 co-relation queries the response was YES. [2024-06-21 17:18:01,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84190 conditions, 11444 events. 7142/11444 cut-off events. For 881541/881543 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 78372 event pairs, 3071 based on Foata normal form. 8/11451 useless extension candidates. Maximal degree in co-relation 84053. Up to 11051 conditions per place. [2024-06-21 17:18:01,314 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 340 selfloop transitions, 67 changer transitions 3/414 dead transitions. [2024-06-21 17:18:01,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 414 transitions, 7118 flow [2024-06-21 17:18:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:18:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:18:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 17:18:01,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 17:18:01,316 INFO L175 Difference]: Start difference. First operand has 283 places, 364 transitions, 6078 flow. Second operand 10 states and 167 transitions. [2024-06-21 17:18:01,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 414 transitions, 7118 flow [2024-06-21 17:18:03,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 414 transitions, 6853 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 17:18:03,390 INFO L231 Difference]: Finished difference. Result has 287 places, 373 transitions, 6080 flow [2024-06-21 17:18:03,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5822, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6080, PETRI_PLACES=287, PETRI_TRANSITIONS=373} [2024-06-21 17:18:03,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 17:18:03,391 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 373 transitions, 6080 flow [2024-06-21 17:18:03,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:03,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:03,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:03,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:18:03,392 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:03,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:03,392 INFO L85 PathProgramCache]: Analyzing trace with hash -965367574, now seen corresponding path program 2 times [2024-06-21 17:18:03,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:03,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547716546] [2024-06-21 17:18:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:03,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:06,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547716546] [2024-06-21 17:18:06,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547716546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:06,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:06,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138693923] [2024-06-21 17:18:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:06,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:06,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:06,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 373 transitions, 6080 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:06,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:06,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:06,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:10,419 INFO L124 PetriNetUnfolderBase]: 7298/11666 cut-off events. [2024-06-21 17:18:10,420 INFO L125 PetriNetUnfolderBase]: For 925254/925256 co-relation queries the response was YES. [2024-06-21 17:18:10,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86615 conditions, 11666 events. 7298/11666 cut-off events. For 925254/925256 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 79823 event pairs, 3043 based on Foata normal form. 8/11673 useless extension candidates. Maximal degree in co-relation 86475. Up to 11149 conditions per place. [2024-06-21 17:18:10,575 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 343 selfloop transitions, 91 changer transitions 1/439 dead transitions. [2024-06-21 17:18:10,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 439 transitions, 7703 flow [2024-06-21 17:18:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:18:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:18:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-21 17:18:10,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-21 17:18:10,577 INFO L175 Difference]: Start difference. First operand has 287 places, 373 transitions, 6080 flow. Second operand 11 states and 182 transitions. [2024-06-21 17:18:10,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 439 transitions, 7703 flow [2024-06-21 17:18:12,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 439 transitions, 7479 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:18:12,795 INFO L231 Difference]: Finished difference. Result has 292 places, 395 transitions, 6457 flow [2024-06-21 17:18:12,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5877, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6457, PETRI_PLACES=292, PETRI_TRANSITIONS=395} [2024-06-21 17:18:12,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 17:18:12,800 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 395 transitions, 6457 flow [2024-06-21 17:18:12,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:12,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:12,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:12,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:18:12,801 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:12,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:12,801 INFO L85 PathProgramCache]: Analyzing trace with hash -792640534, now seen corresponding path program 3 times [2024-06-21 17:18:12,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:12,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363687344] [2024-06-21 17:18:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:12,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:16,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:16,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363687344] [2024-06-21 17:18:16,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363687344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:16,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:16,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:16,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905134099] [2024-06-21 17:18:16,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:16,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:16,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:16,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:16,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 395 transitions, 6457 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:16,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:16,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:16,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:19,791 INFO L124 PetriNetUnfolderBase]: 7280/11634 cut-off events. [2024-06-21 17:18:19,791 INFO L125 PetriNetUnfolderBase]: For 939705/939707 co-relation queries the response was YES. [2024-06-21 17:18:19,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86926 conditions, 11634 events. 7280/11634 cut-off events. For 939705/939707 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 79498 event pairs, 3030 based on Foata normal form. 4/11637 useless extension candidates. Maximal degree in co-relation 86784. Up to 11138 conditions per place. [2024-06-21 17:18:19,937 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 92 changer transitions 2/435 dead transitions. [2024-06-21 17:18:19,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 435 transitions, 7574 flow [2024-06-21 17:18:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:18:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:18:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 17:18:19,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-21 17:18:19,939 INFO L175 Difference]: Start difference. First operand has 292 places, 395 transitions, 6457 flow. Second operand 10 states and 166 transitions. [2024-06-21 17:18:19,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 435 transitions, 7574 flow [2024-06-21 17:18:22,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 435 transitions, 7488 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 17:18:22,318 INFO L231 Difference]: Finished difference. Result has 300 places, 396 transitions, 6612 flow [2024-06-21 17:18:22,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6612, PETRI_PLACES=300, PETRI_TRANSITIONS=396} [2024-06-21 17:18:22,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 17:18:22,319 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 396 transitions, 6612 flow [2024-06-21 17:18:22,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:22,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:22,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:22,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:18:22,319 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:22,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1027053010, now seen corresponding path program 4 times [2024-06-21 17:18:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:22,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625206316] [2024-06-21 17:18:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:26,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:26,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625206316] [2024-06-21 17:18:26,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625206316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:26,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:26,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235671898] [2024-06-21 17:18:26,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:26,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:26,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:26,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:26,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:26,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 396 transitions, 6612 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:26,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:26,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:26,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:30,110 INFO L124 PetriNetUnfolderBase]: 7292/11657 cut-off events. [2024-06-21 17:18:30,110 INFO L125 PetriNetUnfolderBase]: For 982422/982422 co-relation queries the response was YES. [2024-06-21 17:18:30,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87732 conditions, 11657 events. 7292/11657 cut-off events. For 982422/982422 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 79731 event pairs, 3092 based on Foata normal form. 10/11666 useless extension candidates. Maximal degree in co-relation 87586. Up to 11357 conditions per place. [2024-06-21 17:18:30,267 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 389 selfloop transitions, 37 changer transitions 0/430 dead transitions. [2024-06-21 17:18:30,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 430 transitions, 7580 flow [2024-06-21 17:18:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:18:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:18:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-21 17:18:30,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354978354978355 [2024-06-21 17:18:30,268 INFO L175 Difference]: Start difference. First operand has 300 places, 396 transitions, 6612 flow. Second operand 11 states and 164 transitions. [2024-06-21 17:18:30,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 430 transitions, 7580 flow [2024-06-21 17:18:32,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 430 transitions, 7427 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:18:32,098 INFO L231 Difference]: Finished difference. Result has 305 places, 397 transitions, 6551 flow [2024-06-21 17:18:32,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6459, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6551, PETRI_PLACES=305, PETRI_TRANSITIONS=397} [2024-06-21 17:18:32,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 17:18:32,098 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 397 transitions, 6551 flow [2024-06-21 17:18:32,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:32,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:32,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:32,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:18:32,099 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:32,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:32,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1027379440, now seen corresponding path program 5 times [2024-06-21 17:18:32,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:32,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778674934] [2024-06-21 17:18:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:32,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:35,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:35,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778674934] [2024-06-21 17:18:35,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778674934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:35,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:35,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:35,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670434951] [2024-06-21 17:18:35,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:35,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:35,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:35,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:35,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:35,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 397 transitions, 6551 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:35,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:35,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:35,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:39,478 INFO L124 PetriNetUnfolderBase]: 7387/11802 cut-off events. [2024-06-21 17:18:39,478 INFO L125 PetriNetUnfolderBase]: For 1027896/1027896 co-relation queries the response was YES. [2024-06-21 17:18:39,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89378 conditions, 11802 events. 7387/11802 cut-off events. For 1027896/1027896 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 80764 event pairs, 3105 based on Foata normal form. 8/11809 useless extension candidates. Maximal degree in co-relation 89231. Up to 11399 conditions per place. [2024-06-21 17:18:39,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 393 selfloop transitions, 41 changer transitions 0/438 dead transitions. [2024-06-21 17:18:39,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 438 transitions, 7732 flow [2024-06-21 17:18:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:18:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:18:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-21 17:18:39,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147186147186144 [2024-06-21 17:18:39,635 INFO L175 Difference]: Start difference. First operand has 305 places, 397 transitions, 6551 flow. Second operand 11 states and 167 transitions. [2024-06-21 17:18:39,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 438 transitions, 7732 flow [2024-06-21 17:18:41,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 438 transitions, 7673 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:18:41,977 INFO L231 Difference]: Finished difference. Result has 310 places, 401 transitions, 6645 flow [2024-06-21 17:18:41,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6645, PETRI_PLACES=310, PETRI_TRANSITIONS=401} [2024-06-21 17:18:41,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 17:18:41,977 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 401 transitions, 6645 flow [2024-06-21 17:18:41,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:41,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:41,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:41,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:18:41,978 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:41,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash 699716754, now seen corresponding path program 6 times [2024-06-21 17:18:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:41,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700034167] [2024-06-21 17:18:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:45,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:45,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700034167] [2024-06-21 17:18:45,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700034167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:45,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:45,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:45,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007935932] [2024-06-21 17:18:45,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:45,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:45,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 401 transitions, 6645 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:45,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:45,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:45,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:48,744 INFO L124 PetriNetUnfolderBase]: 7364/11769 cut-off events. [2024-06-21 17:18:48,745 INFO L125 PetriNetUnfolderBase]: For 1037578/1037578 co-relation queries the response was YES. [2024-06-21 17:18:48,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89090 conditions, 11769 events. 7364/11769 cut-off events. For 1037578/1037578 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 80618 event pairs, 3106 based on Foata normal form. 10/11778 useless extension candidates. Maximal degree in co-relation 88941. Up to 11469 conditions per place. [2024-06-21 17:18:48,915 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 36 changer transitions 0/431 dead transitions. [2024-06-21 17:18:48,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 431 transitions, 7598 flow [2024-06-21 17:18:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:18:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:18:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 17:18:48,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 17:18:48,916 INFO L175 Difference]: Start difference. First operand has 310 places, 401 transitions, 6645 flow. Second operand 9 states and 141 transitions. [2024-06-21 17:18:48,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 431 transitions, 7598 flow [2024-06-21 17:18:51,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 431 transitions, 7543 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:18:51,346 INFO L231 Difference]: Finished difference. Result has 312 places, 401 transitions, 6667 flow [2024-06-21 17:18:51,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6667, PETRI_PLACES=312, PETRI_TRANSITIONS=401} [2024-06-21 17:18:51,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 17:18:51,347 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 401 transitions, 6667 flow [2024-06-21 17:18:51,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:51,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:51,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:51,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:18:51,348 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:51,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2071277152, now seen corresponding path program 2 times [2024-06-21 17:18:51,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:51,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907247308] [2024-06-21 17:18:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:54,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:54,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907247308] [2024-06-21 17:18:54,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907247308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:54,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:54,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:54,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848230821] [2024-06-21 17:18:54,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:54,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:54,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:54,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:54,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:54,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:54,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 401 transitions, 6667 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:18:54,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:54,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:54,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:58,552 INFO L124 PetriNetUnfolderBase]: 7524/11988 cut-off events. [2024-06-21 17:18:58,552 INFO L125 PetriNetUnfolderBase]: For 1086382/1086384 co-relation queries the response was YES. [2024-06-21 17:18:58,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92489 conditions, 11988 events. 7524/11988 cut-off events. For 1086382/1086384 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 81784 event pairs, 2935 based on Foata normal form. 4/11991 useless extension candidates. Maximal degree in co-relation 92338. Up to 11141 conditions per place. [2024-06-21 17:18:58,712 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 356 selfloop transitions, 128 changer transitions 0/488 dead transitions. [2024-06-21 17:18:58,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 488 transitions, 8953 flow [2024-06-21 17:18:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:18:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:18:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 230 transitions. [2024-06-21 17:18:58,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124542124542125 [2024-06-21 17:18:58,714 INFO L175 Difference]: Start difference. First operand has 312 places, 401 transitions, 6667 flow. Second operand 13 states and 230 transitions. [2024-06-21 17:18:58,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 488 transitions, 8953 flow [2024-06-21 17:19:00,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 488 transitions, 8880 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:00,928 INFO L231 Difference]: Finished difference. Result has 320 places, 421 transitions, 7402 flow [2024-06-21 17:19:00,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6594, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7402, PETRI_PLACES=320, PETRI_TRANSITIONS=421} [2024-06-21 17:19:00,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 17:19:00,929 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 421 transitions, 7402 flow [2024-06-21 17:19:00,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:00,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:00,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:00,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:19:00,930 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:00,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1685409104, now seen corresponding path program 1 times [2024-06-21 17:19:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645576666] [2024-06-21 17:19:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:00,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:04,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:04,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645576666] [2024-06-21 17:19:04,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645576666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:04,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:04,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:04,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695353746] [2024-06-21 17:19:04,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:04,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:04,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:04,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:04,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:04,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 421 transitions, 7402 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:04,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:04,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:04,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:08,097 INFO L124 PetriNetUnfolderBase]: 7512/11952 cut-off events. [2024-06-21 17:19:08,098 INFO L125 PetriNetUnfolderBase]: For 1115395/1115397 co-relation queries the response was YES. [2024-06-21 17:19:08,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93431 conditions, 11952 events. 7512/11952 cut-off events. For 1115395/1115397 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 81485 event pairs, 3107 based on Foata normal form. 6/11957 useless extension candidates. Maximal degree in co-relation 93277. Up to 11479 conditions per place. [2024-06-21 17:19:08,249 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 81 changer transitions 0/467 dead transitions. [2024-06-21 17:19:08,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 467 transitions, 8582 flow [2024-06-21 17:19:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:19:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:19:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 17:19:08,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-21 17:19:08,251 INFO L175 Difference]: Start difference. First operand has 320 places, 421 transitions, 7402 flow. Second operand 11 states and 183 transitions. [2024-06-21 17:19:08,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 467 transitions, 8582 flow [2024-06-21 17:19:10,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 467 transitions, 8348 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:10,840 INFO L231 Difference]: Finished difference. Result has 324 places, 421 transitions, 7336 flow [2024-06-21 17:19:10,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7168, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7336, PETRI_PLACES=324, PETRI_TRANSITIONS=421} [2024-06-21 17:19:10,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 17:19:10,840 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 421 transitions, 7336 flow [2024-06-21 17:19:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:10,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:10,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:10,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:19:10,841 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 17:19:10,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1691070386, now seen corresponding path program 3 times [2024-06-21 17:19:10,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:10,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11893422] [2024-06-21 17:19:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:14,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11893422] [2024-06-21 17:19:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11893422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:14,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:14,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:14,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153310268] [2024-06-21 17:19:14,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:14,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:14,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:14,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:14,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 421 transitions, 7336 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:14,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:14,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:14,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:18,581 INFO L124 PetriNetUnfolderBase]: 7506/11956 cut-off events. [2024-06-21 17:19:18,582 INFO L125 PetriNetUnfolderBase]: For 1131244/1131246 co-relation queries the response was YES. [2024-06-21 17:19:18,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93584 conditions, 11956 events. 7506/11956 cut-off events. For 1131244/1131246 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 81564 event pairs, 2908 based on Foata normal form. 4/11959 useless extension candidates. Maximal degree in co-relation 93428. Up to 11134 conditions per place. [2024-06-21 17:19:18,806 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 351 selfloop transitions, 122 changer transitions 0/477 dead transitions. [2024-06-21 17:19:18,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 477 transitions, 8704 flow [2024-06-21 17:19:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:19:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:19:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-21 17:19:18,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-21 17:19:18,807 INFO L175 Difference]: Start difference. First operand has 324 places, 421 transitions, 7336 flow. Second operand 11 states and 199 transitions. [2024-06-21 17:19:18,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 477 transitions, 8704 flow [2024-06-21 17:19:22,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 477 transitions, 8458 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-21 17:19:22,191 INFO L231 Difference]: Finished difference. Result has 325 places, 421 transitions, 7340 flow [2024-06-21 17:19:22,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7340, PETRI_PLACES=325, PETRI_TRANSITIONS=421} [2024-06-21 17:19:22,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 17:19:22,192 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 421 transitions, 7340 flow [2024-06-21 17:19:22,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:22,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:22,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:19:22,192 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 17:19:22,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1690950230, now seen corresponding path program 4 times [2024-06-21 17:19:22,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:22,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546025432] [2024-06-21 17:19:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:22,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:25,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:25,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546025432] [2024-06-21 17:19:25,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546025432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:25,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:25,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554939455] [2024-06-21 17:19:25,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:25,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:25,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:25,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 421 transitions, 7340 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:25,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:25,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:25,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:29,645 INFO L124 PetriNetUnfolderBase]: 7480/11932 cut-off events. [2024-06-21 17:19:29,645 INFO L125 PetriNetUnfolderBase]: For 1154854/1154856 co-relation queries the response was YES. [2024-06-21 17:19:29,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93360 conditions, 11932 events. 7480/11932 cut-off events. For 1154854/1154856 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 81492 event pairs, 3110 based on Foata normal form. 8/11939 useless extension candidates. Maximal degree in co-relation 93203. Up to 11612 conditions per place. [2024-06-21 17:19:29,799 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 402 selfloop transitions, 48 changer transitions 3/457 dead transitions. [2024-06-21 17:19:29,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 457 transitions, 8338 flow [2024-06-21 17:19:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:19:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:19:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 17:19:29,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 17:19:29,800 INFO L175 Difference]: Start difference. First operand has 325 places, 421 transitions, 7340 flow. Second operand 10 states and 162 transitions. [2024-06-21 17:19:29,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 457 transitions, 8338 flow [2024-06-21 17:19:32,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 457 transitions, 8088 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 17:19:32,674 INFO L231 Difference]: Finished difference. Result has 326 places, 419 transitions, 7149 flow [2024-06-21 17:19:32,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7149, PETRI_PLACES=326, PETRI_TRANSITIONS=419} [2024-06-21 17:19:32,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 17:19:32,675 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 419 transitions, 7149 flow [2024-06-21 17:19:32,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:32,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:32,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:32,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:19:32,676 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:32,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1685409476, now seen corresponding path program 4 times [2024-06-21 17:19:32,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:32,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928226201] [2024-06-21 17:19:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:32,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:36,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:36,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928226201] [2024-06-21 17:19:36,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928226201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:36,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:36,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821265228] [2024-06-21 17:19:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:36,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:36,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:36,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 419 transitions, 7149 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:36,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:36,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:36,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:40,825 INFO L124 PetriNetUnfolderBase]: 7450/11884 cut-off events. [2024-06-21 17:19:40,826 INFO L125 PetriNetUnfolderBase]: For 1166276/1166278 co-relation queries the response was YES. [2024-06-21 17:19:40,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92778 conditions, 11884 events. 7450/11884 cut-off events. For 1166276/1166278 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 81112 event pairs, 2945 based on Foata normal form. 4/11887 useless extension candidates. Maximal degree in co-relation 92620. Up to 11096 conditions per place. [2024-06-21 17:19:41,018 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 349 selfloop transitions, 128 changer transitions 0/481 dead transitions. [2024-06-21 17:19:41,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 481 transitions, 8545 flow [2024-06-21 17:19:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 17:19:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 17:19:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 234 transitions. [2024-06-21 17:19:41,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 17:19:41,020 INFO L175 Difference]: Start difference. First operand has 326 places, 419 transitions, 7149 flow. Second operand 14 states and 234 transitions. [2024-06-21 17:19:41,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 481 transitions, 8545 flow [2024-06-21 17:19:44,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 481 transitions, 8374 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:44,352 INFO L231 Difference]: Finished difference. Result has 333 places, 419 transitions, 7240 flow [2024-06-21 17:19:44,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6978, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7240, PETRI_PLACES=333, PETRI_TRANSITIONS=419} [2024-06-21 17:19:44,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 17:19:44,353 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 419 transitions, 7240 flow [2024-06-21 17:19:44,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:44,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:44,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:44,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:19:44,354 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:44,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2075289358, now seen corresponding path program 5 times [2024-06-21 17:19:44,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:44,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410903800] [2024-06-21 17:19:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:44,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:47,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:47,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410903800] [2024-06-21 17:19:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410903800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:47,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:47,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730941520] [2024-06-21 17:19:47,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:47,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:47,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:47,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 419 transitions, 7240 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:47,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:47,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:47,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:51,926 INFO L124 PetriNetUnfolderBase]: 7622/12156 cut-off events. [2024-06-21 17:19:51,927 INFO L125 PetriNetUnfolderBase]: For 1228202/1228204 co-relation queries the response was YES. [2024-06-21 17:19:52,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96559 conditions, 12156 events. 7622/12156 cut-off events. For 1228202/1228204 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 83146 event pairs, 3093 based on Foata normal form. 8/12163 useless extension candidates. Maximal degree in co-relation 96400. Up to 11693 conditions per place. [2024-06-21 17:19:52,094 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 411 selfloop transitions, 72 changer transitions 1/488 dead transitions. [2024-06-21 17:19:52,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 488 transitions, 9152 flow [2024-06-21 17:19:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:19:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:19:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-21 17:19:52,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2024-06-21 17:19:52,095 INFO L175 Difference]: Start difference. First operand has 333 places, 419 transitions, 7240 flow. Second operand 13 states and 201 transitions. [2024-06-21 17:19:52,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 488 transitions, 9152 flow [2024-06-21 17:19:55,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 488 transitions, 8823 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 17:19:55,407 INFO L231 Difference]: Finished difference. Result has 336 places, 444 transitions, 7777 flow [2024-06-21 17:19:55,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6967, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7777, PETRI_PLACES=336, PETRI_TRANSITIONS=444} [2024-06-21 17:19:55,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 17:19:55,408 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 444 transitions, 7777 flow [2024-06-21 17:19:55,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:55,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:55,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:55,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:19:55,408 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 17:19:55,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2075300518, now seen corresponding path program 6 times [2024-06-21 17:19:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:55,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040328117] [2024-06-21 17:19:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:55,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:58,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:58,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040328117] [2024-06-21 17:19:58,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040328117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:58,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:58,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:58,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098099318] [2024-06-21 17:19:58,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:58,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:58,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:58,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:58,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 444 transitions, 7777 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:19:58,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:58,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:58,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:03,004 INFO L124 PetriNetUnfolderBase]: 7592/12116 cut-off events. [2024-06-21 17:20:03,004 INFO L125 PetriNetUnfolderBase]: For 1237926/1237928 co-relation queries the response was YES. [2024-06-21 17:20:03,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95894 conditions, 12116 events. 7592/12116 cut-off events. For 1237926/1237928 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 82896 event pairs, 3102 based on Foata normal form. 8/12123 useless extension candidates. Maximal degree in co-relation 95731. Up to 11674 conditions per place. [2024-06-21 17:20:03,171 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 406 selfloop transitions, 72 changer transitions 3/485 dead transitions. [2024-06-21 17:20:03,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 485 transitions, 8872 flow [2024-06-21 17:20:03,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:20:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:20:03,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-21 17:20:03,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 17:20:03,172 INFO L175 Difference]: Start difference. First operand has 336 places, 444 transitions, 7777 flow. Second operand 12 states and 188 transitions. [2024-06-21 17:20:03,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 485 transitions, 8872 flow [2024-06-21 17:20:06,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 485 transitions, 8786 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:06,746 INFO L231 Difference]: Finished difference. Result has 343 places, 444 transitions, 7853 flow [2024-06-21 17:20:06,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7853, PETRI_PLACES=343, PETRI_TRANSITIONS=444} [2024-06-21 17:20:06,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-21 17:20:06,747 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 444 transitions, 7853 flow [2024-06-21 17:20:06,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:06,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:06,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:06,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:20:06,748 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 17:20:06,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:06,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1027287184, now seen corresponding path program 7 times [2024-06-21 17:20:06,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:06,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899665268] [2024-06-21 17:20:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:06,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:11,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:11,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899665268] [2024-06-21 17:20:11,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899665268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:11,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:11,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174888689] [2024-06-21 17:20:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:11,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:11,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:11,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:11,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 444 transitions, 7853 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:11,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:11,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:11,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:15,991 INFO L124 PetriNetUnfolderBase]: 7903/12583 cut-off events. [2024-06-21 17:20:15,991 INFO L125 PetriNetUnfolderBase]: For 1323663/1323665 co-relation queries the response was YES. [2024-06-21 17:20:16,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101371 conditions, 12583 events. 7903/12583 cut-off events. For 1323663/1323665 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 86277 event pairs, 3041 based on Foata normal form. 8/12590 useless extension candidates. Maximal degree in co-relation 101205. Up to 11568 conditions per place. [2024-06-21 17:20:16,163 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 353 selfloop transitions, 170 changer transitions 1/528 dead transitions. [2024-06-21 17:20:16,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 528 transitions, 10380 flow [2024-06-21 17:20:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:20:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:20:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-21 17:20:16,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38293650793650796 [2024-06-21 17:20:16,165 INFO L175 Difference]: Start difference. First operand has 343 places, 444 transitions, 7853 flow. Second operand 12 states and 193 transitions. [2024-06-21 17:20:16,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 528 transitions, 10380 flow [2024-06-21 17:20:19,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 528 transitions, 10264 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:19,306 INFO L231 Difference]: Finished difference. Result has 349 places, 483 transitions, 9006 flow [2024-06-21 17:20:19,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9006, PETRI_PLACES=349, PETRI_TRANSITIONS=483} [2024-06-21 17:20:19,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-21 17:20:19,307 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 483 transitions, 9006 flow [2024-06-21 17:20:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:19,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:19,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:19,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:20:19,308 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 17:20:19,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1027050034, now seen corresponding path program 8 times [2024-06-21 17:20:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:19,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794536203] [2024-06-21 17:20:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:19,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794536203] [2024-06-21 17:20:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794536203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:23,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:23,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071748585] [2024-06-21 17:20:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:23,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:23,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:23,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:23,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 483 transitions, 9006 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:23,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:23,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:23,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:28,053 INFO L124 PetriNetUnfolderBase]: 8005/12731 cut-off events. [2024-06-21 17:20:28,054 INFO L125 PetriNetUnfolderBase]: For 1391624/1391626 co-relation queries the response was YES. [2024-06-21 17:20:28,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105208 conditions, 12731 events. 8005/12731 cut-off events. For 1391624/1391626 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 87302 event pairs, 3035 based on Foata normal form. 4/12734 useless extension candidates. Maximal degree in co-relation 105039. Up to 11640 conditions per place. [2024-06-21 17:20:28,234 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 347 selfloop transitions, 184 changer transitions 1/536 dead transitions. [2024-06-21 17:20:28,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 536 transitions, 10995 flow [2024-06-21 17:20:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:20:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:20:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 17:20:28,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 17:20:28,236 INFO L175 Difference]: Start difference. First operand has 349 places, 483 transitions, 9006 flow. Second operand 11 states and 180 transitions. [2024-06-21 17:20:28,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 536 transitions, 10995 flow [2024-06-21 17:20:32,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 536 transitions, 10721 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:32,264 INFO L231 Difference]: Finished difference. Result has 357 places, 497 transitions, 9497 flow [2024-06-21 17:20:32,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8742, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9497, PETRI_PLACES=357, PETRI_TRANSITIONS=497} [2024-06-21 17:20:32,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 17:20:32,264 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 497 transitions, 9497 flow [2024-06-21 17:20:32,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:32,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:32,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:32,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:20:32,265 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 17:20:32,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 686710820, now seen corresponding path program 9 times [2024-06-21 17:20:32,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:32,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496837566] [2024-06-21 17:20:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:32,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:35,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:35,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496837566] [2024-06-21 17:20:35,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496837566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:35,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:35,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:35,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113206369] [2024-06-21 17:20:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:35,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:35,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:35,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 497 transitions, 9497 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:35,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:35,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:35,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:40,688 INFO L124 PetriNetUnfolderBase]: 7987/12679 cut-off events. [2024-06-21 17:20:40,689 INFO L125 PetriNetUnfolderBase]: For 1421672/1421674 co-relation queries the response was YES. [2024-06-21 17:20:40,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105844 conditions, 12679 events. 7987/12679 cut-off events. For 1421672/1421674 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 86549 event pairs, 3176 based on Foata normal form. 4/12682 useless extension candidates. Maximal degree in co-relation 105672. Up to 12285 conditions per place. [2024-06-21 17:20:40,853 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 62 changer transitions 4/526 dead transitions. [2024-06-21 17:20:40,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 526 transitions, 10622 flow [2024-06-21 17:20:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-21 17:20:40,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-21 17:20:40,856 INFO L175 Difference]: Start difference. First operand has 357 places, 497 transitions, 9497 flow. Second operand 10 states and 152 transitions. [2024-06-21 17:20:40,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 526 transitions, 10622 flow [2024-06-21 17:20:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 526 transitions, 10332 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:45,100 INFO L231 Difference]: Finished difference. Result has 360 places, 494 transitions, 9266 flow [2024-06-21 17:20:45,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9207, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9266, PETRI_PLACES=360, PETRI_TRANSITIONS=494} [2024-06-21 17:20:45,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-21 17:20:45,101 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 494 transitions, 9266 flow [2024-06-21 17:20:45,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:45,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:45,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:45,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:20:45,101 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 17:20:45,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash -413278670, now seen corresponding path program 10 times [2024-06-21 17:20:45,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:45,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799061787] [2024-06-21 17:20:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:45,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:48,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:48,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799061787] [2024-06-21 17:20:48,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799061787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:48,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:48,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823629437] [2024-06-21 17:20:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:48,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:48,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:48,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:48,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 494 transitions, 9266 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:48,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:48,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:48,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:54,270 INFO L124 PetriNetUnfolderBase]: 7945/12633 cut-off events. [2024-06-21 17:20:54,270 INFO L125 PetriNetUnfolderBase]: For 1443579/1443581 co-relation queries the response was YES. [2024-06-21 17:20:54,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104726 conditions, 12633 events. 7945/12633 cut-off events. For 1443579/1443581 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 86369 event pairs, 3151 based on Foata normal form. 8/12640 useless extension candidates. Maximal degree in co-relation 104553. Up to 12121 conditions per place. [2024-06-21 17:20:54,457 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 448 selfloop transitions, 75 changer transitions 1/528 dead transitions. [2024-06-21 17:20:54,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 528 transitions, 10571 flow [2024-06-21 17:20:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:20:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:20:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-21 17:20:54,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-21 17:20:54,459 INFO L175 Difference]: Start difference. First operand has 360 places, 494 transitions, 9266 flow. Second operand 11 states and 173 transitions. [2024-06-21 17:20:54,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 528 transitions, 10571 flow [2024-06-21 17:20:58,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 528 transitions, 10440 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:58,414 INFO L231 Difference]: Finished difference. Result has 364 places, 493 transitions, 9266 flow [2024-06-21 17:20:58,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9135, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9266, PETRI_PLACES=364, PETRI_TRANSITIONS=493} [2024-06-21 17:20:58,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 17:20:58,422 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 493 transitions, 9266 flow [2024-06-21 17:20:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:20:58,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:58,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:58,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:20:58,423 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 17:20:58,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash -478343136, now seen corresponding path program 11 times [2024-06-21 17:20:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:58,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436380704] [2024-06-21 17:20:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:02,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:02,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436380704] [2024-06-21 17:21:02,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436380704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:02,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:02,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775321819] [2024-06-21 17:21:02,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:02,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:02,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:02,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 493 transitions, 9266 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:21:02,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:02,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:02,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:07,384 INFO L124 PetriNetUnfolderBase]: 7927/12631 cut-off events. [2024-06-21 17:21:07,385 INFO L125 PetriNetUnfolderBase]: For 1458133/1458135 co-relation queries the response was YES. [2024-06-21 17:21:07,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104912 conditions, 12631 events. 7927/12631 cut-off events. For 1458133/1458135 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 86640 event pairs, 3034 based on Foata normal form. 4/12634 useless extension candidates. Maximal degree in co-relation 104738. Up to 11591 conditions per place. [2024-06-21 17:21:07,557 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 340 selfloop transitions, 182 changer transitions 2/528 dead transitions. [2024-06-21 17:21:07,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 528 transitions, 10770 flow [2024-06-21 17:21:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 17:21:07,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:21:07,559 INFO L175 Difference]: Start difference. First operand has 364 places, 493 transitions, 9266 flow. Second operand 10 states and 165 transitions. [2024-06-21 17:21:07,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 528 transitions, 10770 flow [2024-06-21 17:21:11,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 528 transitions, 10602 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:11,647 INFO L231 Difference]: Finished difference. Result has 368 places, 494 transitions, 9521 flow [2024-06-21 17:21:11,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9521, PETRI_PLACES=368, PETRI_TRANSITIONS=494} [2024-06-21 17:21:11,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 17:21:11,647 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 494 transitions, 9521 flow [2024-06-21 17:21:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:21:11,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:11,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:11,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:21:11,648 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 17:21:11,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1023556954, now seen corresponding path program 12 times [2024-06-21 17:21:11,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:11,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086252313] [2024-06-21 17:21:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:11,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:15,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:15,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086252313] [2024-06-21 17:21:15,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086252313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:15,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:15,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965123500] [2024-06-21 17:21:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:15,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:15,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:15,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:15,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 494 transitions, 9521 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:21:15,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:15,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:20,854 INFO L124 PetriNetUnfolderBase]: 7877/12549 cut-off events. [2024-06-21 17:21:20,854 INFO L125 PetriNetUnfolderBase]: For 1488191/1488193 co-relation queries the response was YES. [2024-06-21 17:21:20,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104683 conditions, 12549 events. 7877/12549 cut-off events. For 1488191/1488193 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 85944 event pairs, 3147 based on Foata normal form. 8/12556 useless extension candidates. Maximal degree in co-relation 104508. Up to 12050 conditions per place. [2024-06-21 17:21:21,028 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 451 selfloop transitions, 75 changer transitions 2/532 dead transitions. [2024-06-21 17:21:21,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 532 transitions, 10661 flow [2024-06-21 17:21:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:21:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:21:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 198 transitions. [2024-06-21 17:21:21,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2024-06-21 17:21:21,030 INFO L175 Difference]: Start difference. First operand has 368 places, 494 transitions, 9521 flow. Second operand 13 states and 198 transitions. [2024-06-21 17:21:21,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 532 transitions, 10661 flow [2024-06-21 17:21:25,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 532 transitions, 10354 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:25,371 INFO L231 Difference]: Finished difference. Result has 374 places, 492 transitions, 9312 flow [2024-06-21 17:21:25,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9214, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9312, PETRI_PLACES=374, PETRI_TRANSITIONS=492} [2024-06-21 17:21:25,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 17:21:25,372 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 492 transitions, 9312 flow [2024-06-21 17:21:25,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 17:21:25,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:25,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:25,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:21:25,373 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 17:21:25,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:25,373 INFO L85 PathProgramCache]: Analyzing trace with hash -477946398, now seen corresponding path program 1 times [2024-06-21 17:21:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:25,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459753587] [2024-06-21 17:21:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:25,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat