./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_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/mutex-meet-nonrel/safe019_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/safe019_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_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 21:56:44,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:56:44,523 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:56:44,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:56:44,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:56:44,541 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:56:44,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:56:44,542 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:56:44,542 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:56:44,542 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:56:44,543 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:56:44,543 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:56:44,544 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:56:44,544 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:56:44,544 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:56:44,544 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:56:44,545 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:56:44,545 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:56:44,545 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:56:44,545 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:56:44,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:56:44,546 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:56:44,546 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:56:44,547 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:56:44,547 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:56:44,547 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:56:44,547 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:56:44,547 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:56:44,548 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:56:44,548 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:56:44,548 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:56:44,548 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:56:44,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:56:44,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:56:44,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:56:44,549 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:56:44,549 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:56:44,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:56:44,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:56:44,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:56:44,550 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:56:44,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:56:44,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:56:44,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:56:44,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:56:44,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:56:44,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:56:44,788 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:56:44,788 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:56:44,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_power.oepc.yml/witness.yml [2024-06-21 21:56:45,065 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:56:45,066 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:56:45,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i [2024-06-21 21:56:46,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:56:46,289 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:56:46,290 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i [2024-06-21 21:56:46,301 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f65952f/06dc22bbe9714824ab30ff1e5ac9ca7e/FLAGfb9f11e71 [2024-06-21 21:56:46,312 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f65952f/06dc22bbe9714824ab30ff1e5ac9ca7e [2024-06-21 21:56:46,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:56:46,313 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:56:46,314 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:56:46,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:56:46,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:56:46,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:56:45" (1/2) ... [2024-06-21 21:56:46,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2446210b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:56:46, skipping insertion in model container [2024-06-21 21:56:46,320 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:56:45" (1/2) ... [2024-06-21 21:56:46,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27d4879c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:56:46, skipping insertion in model container [2024-06-21 21:56:46,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:56:46" (2/2) ... [2024-06-21 21:56:46,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2446210b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:46, skipping insertion in model container [2024-06-21 21:56:46,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:56:46" (2/2) ... [2024-06-21 21:56:46,322 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:56:46,473 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:56:46,474 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff0_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$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 || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$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)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0) [2024-06-21 21:56:46,474 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff0_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)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$read_delayed_var == 2))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__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$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0) [2024-06-21 21:56:46,474 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff0_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$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 || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$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)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0) [2024-06-21 21:56:46,475 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff0_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)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$read_delayed_var == 2))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__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$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0) [2024-06-21 21:56:46,475 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:56:46,475 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-21 21:56:46,510 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:56:46,893 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:56:46,903 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:56:47,038 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:56:47,079 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:56:47,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47 WrapperNode [2024-06-21 21:56:47,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:56:47,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:56:47,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:56:47,081 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:56:47,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,145 INFO L138 Inliner]: procedures = 176, calls = 120, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 328 [2024-06-21 21:56:47,146 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:56:47,146 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:56:47,146 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:56:47,147 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:56:47,155 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,189 INFO L175 MemorySlicer]: Split 74 memory accesses to 2 slices as follows [2, 72]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-21 21:56:47,189 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,189 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,210 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,217 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:56:47,224 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:56:47,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:56:47,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:56:47,225 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (1/1) ... [2024-06-21 21:56:47,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:56:47,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:56:47,249 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 21:56:47,257 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 21:56:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:56:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:56:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:56:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:56:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:56:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:56:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:56:47,285 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:56:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:56:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:56:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:56:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:56:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:56:47,287 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:56:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:56:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:56:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:56:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:56:47,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:56:47,290 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 21:56:47,439 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:56:47,441 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:56:48,055 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:56:48,055 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:56:48,571 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:56:48,572 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:56:48,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:56:48 BoogieIcfgContainer [2024-06-21 21:56:48,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:56:48,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:56:48,574 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:56:48,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:56:48,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:56:45" (1/4) ... [2024-06-21 21:56:48,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d73cf52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:56:48, skipping insertion in model container [2024-06-21 21:56:48,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:56:46" (2/4) ... [2024-06-21 21:56:48,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d73cf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:56:48, skipping insertion in model container [2024-06-21 21:56:48,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:56:47" (3/4) ... [2024-06-21 21:56:48,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d73cf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:56:48, skipping insertion in model container [2024-06-21 21:56:48,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:56:48" (4/4) ... [2024-06-21 21:56:48,580 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.oepc.i [2024-06-21 21:56:48,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:56:48,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:56:48,595 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:56:48,657 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:56:48,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 21:56:48,722 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 21:56:48,722 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:56:48,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:56:48,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 21:56:48,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 21:56:48,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:56:48,744 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;@5814e847, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:56:48,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:56:48,749 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:56:48,749 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:56:48,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:56:48,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:48,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:56:48,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:56:48,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1000071962, now seen corresponding path program 1 times [2024-06-21 21:56:48,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:48,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629209631] [2024-06-21 21:56:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:50,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:50,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629209631] [2024-06-21 21:56:50,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629209631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:50,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:50,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:56:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675433508] [2024-06-21 21:56:50,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:50,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:56:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:56:51,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:56:51,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 21:56:51,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:51,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:51,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 21:56:51,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:52,355 INFO L124 PetriNetUnfolderBase]: 4366/6138 cut-off events. [2024-06-21 21:56:52,355 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-21 21:56:52,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 6138 events. 4366/6138 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32258 event pairs, 3068 based on Foata normal form. 1/6033 useless extension candidates. Maximal degree in co-relation 12396. Up to 6049 conditions per place. [2024-06-21 21:56:52,397 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-21 21:56:52,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 239 flow [2024-06-21 21:56:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:56:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:56:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-21 21:56:52,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 21:56:52,409 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-21 21:56:52,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 239 flow [2024-06-21 21:56:52,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:56:52,418 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 21:56:52,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 21:56:52,423 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 21:56:52,423 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 21:56:52,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:52,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:52,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:52,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:56:52,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:56:52,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1003346063, now seen corresponding path program 1 times [2024-06-21 21:56:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116926684] [2024-06-21 21:56:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:52,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:55,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116926684] [2024-06-21 21:56:55,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116926684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:55,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:55,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:56:55,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142742955] [2024-06-21 21:56:55,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:55,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:56:55,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:56:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:56:55,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 21:56:55,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:55,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:55,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 21:56:55,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:56,532 INFO L124 PetriNetUnfolderBase]: 4356/6125 cut-off events. [2024-06-21 21:56:56,532 INFO L125 PetriNetUnfolderBase]: For 1244/1254 co-relation queries the response was YES. [2024-06-21 21:56:56,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14294 conditions, 6125 events. 4356/6125 cut-off events. For 1244/1254 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32094 event pairs, 2547 based on Foata normal form. 7/6128 useless extension candidates. Maximal degree in co-relation 14282. Up to 6008 conditions per place. [2024-06-21 21:56:56,564 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-21 21:56:56,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 343 flow [2024-06-21 21:56:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:56:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:56:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-21 21:56:56,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-21 21:56:56,568 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-21 21:56:56,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 343 flow [2024-06-21 21:56:56,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:56:56,573 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 21:56:56,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 21:56:56,574 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 21:56:56,575 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 21:56:56,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:56,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:56,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:56,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:56:56,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:56:56,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2003305938, now seen corresponding path program 1 times [2024-06-21 21:56:56,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:56,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238185709] [2024-06-21 21:56:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:56,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:00,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:00,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238185709] [2024-06-21 21:57:00,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238185709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:00,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:00,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:57:00,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066381772] [2024-06-21 21:57:00,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:00,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:57:00,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:57:00,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:57:00,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 21:57:00,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:00,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:00,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 21:57:00,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:02,046 INFO L124 PetriNetUnfolderBase]: 5530/7706 cut-off events. [2024-06-21 21:57:02,046 INFO L125 PetriNetUnfolderBase]: For 4351/4370 co-relation queries the response was YES. [2024-06-21 21:57:02,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 7706 events. 5530/7706 cut-off events. For 4351/4370 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40048 event pairs, 2395 based on Foata normal form. 14/7716 useless extension candidates. Maximal degree in co-relation 20093. Up to 7514 conditions per place. [2024-06-21 21:57:02,087 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-21 21:57:02,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 528 flow [2024-06-21 21:57:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:57:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:57:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 21:57:02,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 21:57:02,089 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 173 transitions. [2024-06-21 21:57:02,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 528 flow [2024-06-21 21:57:02,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 500 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 21:57:02,093 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 21:57:02,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 21:57:02,094 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 21:57:02,095 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 21:57:02,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:02,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:02,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:02,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:57:02,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:02,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1730772379, now seen corresponding path program 1 times [2024-06-21 21:57:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:02,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869020074] [2024-06-21 21:57:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:02,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:03,667 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 21:57:03,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:03,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869020074] [2024-06-21 21:57:03,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869020074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:03,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:03,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:57:03,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627530106] [2024-06-21 21:57:03,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:03,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:57:03,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:57:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:57:03,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:03,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:03,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:03,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:03,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:05,472 INFO L124 PetriNetUnfolderBase]: 6648/9210 cut-off events. [2024-06-21 21:57:05,472 INFO L125 PetriNetUnfolderBase]: For 9702/9702 co-relation queries the response was YES. [2024-06-21 21:57:05,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26380 conditions, 9210 events. 6648/9210 cut-off events. For 9702/9702 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47542 event pairs, 3316 based on Foata normal form. 3/9210 useless extension candidates. Maximal degree in co-relation 26363. Up to 9108 conditions per place. [2024-06-21 21:57:05,512 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 70 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-21 21:57:05,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 494 flow [2024-06-21 21:57:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:57:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:57:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 21:57:05,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 21:57:05,513 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 118 transitions. [2024-06-21 21:57:05,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 494 flow [2024-06-21 21:57:05,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 450 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:57:05,518 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 286 flow [2024-06-21 21:57:05,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-21 21:57:05,518 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-21 21:57:05,519 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 286 flow [2024-06-21 21:57:05,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:05,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:05,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:05,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:57:05,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:05,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:05,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1120074138, now seen corresponding path program 1 times [2024-06-21 21:57:05,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:05,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095090839] [2024-06-21 21:57:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:05,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:08,586 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 21:57:08,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:08,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095090839] [2024-06-21 21:57:08,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095090839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:08,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:08,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:57:08,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791960091] [2024-06-21 21:57:08,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:08,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:57:08,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:57:08,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:57:08,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:08,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:08,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:08,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:08,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:10,862 INFO L124 PetriNetUnfolderBase]: 6675/9240 cut-off events. [2024-06-21 21:57:10,862 INFO L125 PetriNetUnfolderBase]: For 14074/14074 co-relation queries the response was YES. [2024-06-21 21:57:10,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 9240 events. 6675/9240 cut-off events. For 14074/14074 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47618 event pairs, 3168 based on Foata normal form. 3/9237 useless extension candidates. Maximal degree in co-relation 28841. Up to 9077 conditions per place. [2024-06-21 21:57:10,913 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-21 21:57:10,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 675 flow [2024-06-21 21:57:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:57:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:57:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 21:57:10,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:57:10,916 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 286 flow. Second operand 6 states and 150 transitions. [2024-06-21 21:57:10,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 675 flow [2024-06-21 21:57:10,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 21:57:10,922 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 409 flow [2024-06-21 21:57:10,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-21 21:57:10,923 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 21:57:10,923 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 409 flow [2024-06-21 21:57:10,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:10,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:10,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:10,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:57:10,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:10,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:10,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1650619388, now seen corresponding path program 2 times [2024-06-21 21:57:10,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:10,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188207146] [2024-06-21 21:57:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:10,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:13,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188207146] [2024-06-21 21:57:13,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188207146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:13,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:13,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:57:13,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775621723] [2024-06-21 21:57:13,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:13,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:57:13,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:57:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:57:13,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:13,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:13,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:13,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:13,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:15,599 INFO L124 PetriNetUnfolderBase]: 6666/9238 cut-off events. [2024-06-21 21:57:15,599 INFO L125 PetriNetUnfolderBase]: For 20522/20537 co-relation queries the response was YES. [2024-06-21 21:57:15,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31511 conditions, 9238 events. 6666/9238 cut-off events. For 20522/20537 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47590 event pairs, 3175 based on Foata normal form. 13/9245 useless extension candidates. Maximal degree in co-relation 31487. Up to 9068 conditions per place. [2024-06-21 21:57:15,651 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-21 21:57:15,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 694 flow [2024-06-21 21:57:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:57:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:57:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 21:57:15,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:57:15,653 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 409 flow. Second operand 6 states and 143 transitions. [2024-06-21 21:57:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 694 flow [2024-06-21 21:57:15,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 21:57:15,673 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 423 flow [2024-06-21 21:57:15,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 21:57:15,674 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 21:57:15,674 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 423 flow [2024-06-21 21:57:15,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:15,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:15,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:15,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:57:15,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:15,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:15,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1119858812, now seen corresponding path program 1 times [2024-06-21 21:57:15,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:15,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733812090] [2024-06-21 21:57:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:15,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:17,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:17,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733812090] [2024-06-21 21:57:17,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733812090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:17,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:17,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:57:17,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124454751] [2024-06-21 21:57:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:17,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:57:17,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:17,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:57:17,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:57:17,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:17,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:17,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:17,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:17,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:19,486 INFO L124 PetriNetUnfolderBase]: 6651/9214 cut-off events. [2024-06-21 21:57:19,486 INFO L125 PetriNetUnfolderBase]: For 23651/23651 co-relation queries the response was YES. [2024-06-21 21:57:19,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31802 conditions, 9214 events. 6651/9214 cut-off events. For 23651/23651 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47474 event pairs, 3011 based on Foata normal form. 6/9217 useless extension candidates. Maximal degree in co-relation 31777. Up to 9074 conditions per place. [2024-06-21 21:57:19,532 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 92 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-21 21:57:19,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 733 flow [2024-06-21 21:57:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:57:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:57:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 21:57:19,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 21:57:19,535 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 423 flow. Second operand 6 states and 141 transitions. [2024-06-21 21:57:19,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 733 flow [2024-06-21 21:57:19,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 21:57:19,551 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 454 flow [2024-06-21 21:57:19,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 21:57:19,552 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 21:57:19,552 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 454 flow [2024-06-21 21:57:19,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:19,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:19,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:19,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:57:19,553 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:19,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash -533380814, now seen corresponding path program 1 times [2024-06-21 21:57:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:19,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981022438] [2024-06-21 21:57:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:22,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:22,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981022438] [2024-06-21 21:57:22,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981022438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:22,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:22,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996487708] [2024-06-21 21:57:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:22,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:22,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:22,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:22,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:22,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:22,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:22,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:24,940 INFO L124 PetriNetUnfolderBase]: 6697/9305 cut-off events. [2024-06-21 21:57:24,940 INFO L125 PetriNetUnfolderBase]: For 30778/30781 co-relation queries the response was YES. [2024-06-21 21:57:24,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33868 conditions, 9305 events. 6697/9305 cut-off events. For 30778/30781 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 48576 event pairs, 2838 based on Foata normal form. 7/9308 useless extension candidates. Maximal degree in co-relation 33841. Up to 9064 conditions per place. [2024-06-21 21:57:24,990 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 102 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-21 21:57:24,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 870 flow [2024-06-21 21:57:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:24,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:57:24,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 21:57:24,992 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 454 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:57:24,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 870 flow [2024-06-21 21:57:25,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 832 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:57:25,012 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 526 flow [2024-06-21 21:57:25,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-21 21:57:25,012 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 21:57:25,012 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 526 flow [2024-06-21 21:57:25,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:25,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:25,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:25,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:57:25,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:25,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1434116708, now seen corresponding path program 2 times [2024-06-21 21:57:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:25,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454590256] [2024-06-21 21:57:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:28,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454590256] [2024-06-21 21:57:28,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454590256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:28,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:28,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:28,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498812575] [2024-06-21 21:57:28,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:28,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:28,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:28,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:28,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:28,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:28,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:28,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:28,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:30,717 INFO L124 PetriNetUnfolderBase]: 6724/9332 cut-off events. [2024-06-21 21:57:30,717 INFO L125 PetriNetUnfolderBase]: For 38967/38967 co-relation queries the response was YES. [2024-06-21 21:57:30,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36900 conditions, 9332 events. 6724/9332 cut-off events. For 38967/38967 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48320 event pairs, 2984 based on Foata normal form. 3/9329 useless extension candidates. Maximal degree in co-relation 36872. Up to 9059 conditions per place. [2024-06-21 21:57:30,764 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 105 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-21 21:57:30,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 145 transitions, 1096 flow [2024-06-21 21:57:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 21:57:30,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:57:30,766 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 526 flow. Second operand 7 states and 175 transitions. [2024-06-21 21:57:30,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 145 transitions, 1096 flow [2024-06-21 21:57:30,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 998 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:30,785 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 682 flow [2024-06-21 21:57:30,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-21 21:57:30,786 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-21 21:57:30,786 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 682 flow [2024-06-21 21:57:30,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:30,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:30,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:30,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:57:30,787 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:30,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1884696142, now seen corresponding path program 3 times [2024-06-21 21:57:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:30,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645629164] [2024-06-21 21:57:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:30,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:33,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:33,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645629164] [2024-06-21 21:57:33,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645629164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:33,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:33,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:33,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280931813] [2024-06-21 21:57:33,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:33,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:33,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:33,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:33,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 682 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:33,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:33,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:33,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:36,022 INFO L124 PetriNetUnfolderBase]: 6715/9322 cut-off events. [2024-06-21 21:57:36,022 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-21 21:57:36,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39394 conditions, 9322 events. 6715/9322 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48125 event pairs, 3001 based on Foata normal form. 3/9315 useless extension candidates. Maximal degree in co-relation 39363. Up to 9050 conditions per place. [2024-06-21 21:57:36,073 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 35 changer transitions 0/139 dead transitions. [2024-06-21 21:57:36,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1057 flow [2024-06-21 21:57:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 21:57:36,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 21:57:36,075 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 682 flow. Second operand 7 states and 168 transitions. [2024-06-21 21:57:36,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1057 flow [2024-06-21 21:57:36,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 21:57:36,100 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 710 flow [2024-06-21 21:57:36,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-21 21:57:36,101 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-21 21:57:36,101 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 710 flow [2024-06-21 21:57:36,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:36,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:36,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:36,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:57:36,102 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:36,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 60593413, now seen corresponding path program 1 times [2024-06-21 21:57:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645273305] [2024-06-21 21:57:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:36,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:38,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645273305] [2024-06-21 21:57:38,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645273305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:38,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:38,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200596659] [2024-06-21 21:57:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:38,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:39,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:39,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:39,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:39,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:39,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:41,468 INFO L124 PetriNetUnfolderBase]: 6861/9541 cut-off events. [2024-06-21 21:57:41,469 INFO L125 PetriNetUnfolderBase]: For 57471/57471 co-relation queries the response was YES. [2024-06-21 21:57:41,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41305 conditions, 9541 events. 6861/9541 cut-off events. For 57471/57471 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 49170 event pairs, 2984 based on Foata normal form. 6/9541 useless extension candidates. Maximal degree in co-relation 41272. Up to 9256 conditions per place. [2024-06-21 21:57:41,519 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 126 selfloop transitions, 42 changer transitions 0/174 dead transitions. [2024-06-21 21:57:41,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 174 transitions, 1392 flow [2024-06-21 21:57:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:57:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:57:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 21:57:41,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 21:57:41,521 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 710 flow. Second operand 8 states and 196 transitions. [2024-06-21 21:57:41,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 174 transitions, 1392 flow [2024-06-21 21:57:41,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 174 transitions, 1306 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 21:57:41,560 INFO L231 Difference]: Finished difference. Result has 94 places, 121 transitions, 977 flow [2024-06-21 21:57:41,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=94, PETRI_TRANSITIONS=121} [2024-06-21 21:57:41,561 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-21 21:57:41,561 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 121 transitions, 977 flow [2024-06-21 21:57:41,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:41,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:41,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:41,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:57:41,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:41,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1507937509, now seen corresponding path program 2 times [2024-06-21 21:57:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:41,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432290644] [2024-06-21 21:57:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:41,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:44,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:44,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432290644] [2024-06-21 21:57:44,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432290644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:44,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:44,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557710305] [2024-06-21 21:57:44,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:44,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:44,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:44,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:44,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 121 transitions, 977 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:44,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:44,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:44,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:47,092 INFO L124 PetriNetUnfolderBase]: 6905/9605 cut-off events. [2024-06-21 21:57:47,093 INFO L125 PetriNetUnfolderBase]: For 69311/69311 co-relation queries the response was YES. [2024-06-21 21:57:47,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43745 conditions, 9605 events. 6905/9605 cut-off events. For 69311/69311 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 49760 event pairs, 2940 based on Foata normal form. 6/9605 useless extension candidates. Maximal degree in co-relation 43708. Up to 9274 conditions per place. [2024-06-21 21:57:47,155 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 121 selfloop transitions, 43 changer transitions 0/170 dead transitions. [2024-06-21 21:57:47,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 170 transitions, 1483 flow [2024-06-21 21:57:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 21:57:47,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-21 21:57:47,157 INFO L175 Difference]: Start difference. First operand has 94 places, 121 transitions, 977 flow. Second operand 7 states and 170 transitions. [2024-06-21 21:57:47,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 170 transitions, 1483 flow [2024-06-21 21:57:47,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 170 transitions, 1411 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 21:57:47,200 INFO L231 Difference]: Finished difference. Result has 98 places, 124 transitions, 1052 flow [2024-06-21 21:57:47,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1052, PETRI_PLACES=98, PETRI_TRANSITIONS=124} [2024-06-21 21:57:47,201 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-21 21:57:47,201 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 124 transitions, 1052 flow [2024-06-21 21:57:47,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:47,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:47,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:47,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:57:47,202 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:47,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:47,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2043954611, now seen corresponding path program 3 times [2024-06-21 21:57:47,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:47,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930033718] [2024-06-21 21:57:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:47,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:50,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930033718] [2024-06-21 21:57:50,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930033718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:50,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:50,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:50,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160912483] [2024-06-21 21:57:50,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:50,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:50,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:50,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 124 transitions, 1052 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:50,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:50,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:50,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:52,602 INFO L124 PetriNetUnfolderBase]: 6949/9679 cut-off events. [2024-06-21 21:57:52,602 INFO L125 PetriNetUnfolderBase]: For 81990/82005 co-relation queries the response was YES. [2024-06-21 21:57:52,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45943 conditions, 9679 events. 6949/9679 cut-off events. For 81990/82005 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50241 event pairs, 2959 based on Foata normal form. 16/9686 useless extension candidates. Maximal degree in co-relation 45905. Up to 9376 conditions per place. [2024-06-21 21:57:52,660 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 125 selfloop transitions, 40 changer transitions 0/171 dead transitions. [2024-06-21 21:57:52,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 171 transitions, 1566 flow [2024-06-21 21:57:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 21:57:52,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-21 21:57:52,662 INFO L175 Difference]: Start difference. First operand has 98 places, 124 transitions, 1052 flow. Second operand 7 states and 166 transitions. [2024-06-21 21:57:52,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 171 transitions, 1566 flow [2024-06-21 21:57:52,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1443 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:52,698 INFO L231 Difference]: Finished difference. Result has 100 places, 127 transitions, 1072 flow [2024-06-21 21:57:52,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1072, PETRI_PLACES=100, PETRI_TRANSITIONS=127} [2024-06-21 21:57:52,699 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-21 21:57:52,699 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 127 transitions, 1072 flow [2024-06-21 21:57:52,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:52,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:52,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:52,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:57:52,700 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:52,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash -860873287, now seen corresponding path program 4 times [2024-06-21 21:57:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080480433] [2024-06-21 21:57:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:55,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:55,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080480433] [2024-06-21 21:57:55,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080480433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:55,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:55,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:55,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395135674] [2024-06-21 21:57:55,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:55,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:55,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:55,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:55,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:55,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:57:55,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 127 transitions, 1072 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:55,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:55,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:57:55,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:57,725 INFO L124 PetriNetUnfolderBase]: 6934/9658 cut-off events. [2024-06-21 21:57:57,725 INFO L125 PetriNetUnfolderBase]: For 81582/81597 co-relation queries the response was YES. [2024-06-21 21:57:57,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45630 conditions, 9658 events. 6934/9658 cut-off events. For 81582/81597 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50031 event pairs, 2722 based on Foata normal form. 16/9665 useless extension candidates. Maximal degree in co-relation 45591. Up to 9185 conditions per place. [2024-06-21 21:57:57,784 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 117 selfloop transitions, 51 changer transitions 0/174 dead transitions. [2024-06-21 21:57:57,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 174 transitions, 1586 flow [2024-06-21 21:57:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 21:57:57,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 21:57:57,786 INFO L175 Difference]: Start difference. First operand has 100 places, 127 transitions, 1072 flow. Second operand 7 states and 167 transitions. [2024-06-21 21:57:57,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 174 transitions, 1586 flow [2024-06-21 21:57:57,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 174 transitions, 1477 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:57,826 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1127 flow [2024-06-21 21:57:57,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1127, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2024-06-21 21:57:57,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-21 21:57:57,827 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1127 flow [2024-06-21 21:57:57,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:57,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:57,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:57,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:57:57,827 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:57:57,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1976951789, now seen corresponding path program 1 times [2024-06-21 21:57:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:57,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135535340] [2024-06-21 21:57:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:57,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:01,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135535340] [2024-06-21 21:58:01,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135535340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:01,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:01,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:01,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66810559] [2024-06-21 21:58:01,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:01,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:01,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1127 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:01,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:01,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:01,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:04,196 INFO L124 PetriNetUnfolderBase]: 7532/10542 cut-off events. [2024-06-21 21:58:04,196 INFO L125 PetriNetUnfolderBase]: For 107622/107625 co-relation queries the response was YES. [2024-06-21 21:58:04,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52174 conditions, 10542 events. 7532/10542 cut-off events. For 107622/107625 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55933 event pairs, 2362 based on Foata normal form. 32/10570 useless extension candidates. Maximal degree in co-relation 52134. Up to 9547 conditions per place. [2024-06-21 21:58:04,254 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 167 selfloop transitions, 43 changer transitions 0/216 dead transitions. [2024-06-21 21:58:04,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 216 transitions, 1979 flow [2024-06-21 21:58:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-21 21:58:04,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 21:58:04,256 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1127 flow. Second operand 9 states and 231 transitions. [2024-06-21 21:58:04,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 216 transitions, 1979 flow [2024-06-21 21:58:04,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 1841 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 21:58:04,319 INFO L231 Difference]: Finished difference. Result has 107 places, 139 transitions, 1221 flow [2024-06-21 21:58:04,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1221, PETRI_PLACES=107, PETRI_TRANSITIONS=139} [2024-06-21 21:58:04,319 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 21:58:04,319 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 139 transitions, 1221 flow [2024-06-21 21:58:04,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:04,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:04,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:04,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:58:04,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:04,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:04,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1477805135, now seen corresponding path program 2 times [2024-06-21 21:58:04,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:04,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30030261] [2024-06-21 21:58:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:04,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:07,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:07,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30030261] [2024-06-21 21:58:07,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30030261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:07,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:07,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:07,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779487041] [2024-06-21 21:58:07,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:07,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:07,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:07,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 139 transitions, 1221 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:07,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:07,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:07,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:10,545 INFO L124 PetriNetUnfolderBase]: 7434/10404 cut-off events. [2024-06-21 21:58:10,545 INFO L125 PetriNetUnfolderBase]: For 120084/120087 co-relation queries the response was YES. [2024-06-21 21:58:10,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52857 conditions, 10404 events. 7434/10404 cut-off events. For 120084/120087 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 55275 event pairs, 2842 based on Foata normal form. 42/10442 useless extension candidates. Maximal degree in co-relation 52815. Up to 9803 conditions per place. [2024-06-21 21:58:10,615 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 159 selfloop transitions, 37 changer transitions 0/202 dead transitions. [2024-06-21 21:58:10,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 202 transitions, 1828 flow [2024-06-21 21:58:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 21:58:10,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 21:58:10,617 INFO L175 Difference]: Start difference. First operand has 107 places, 139 transitions, 1221 flow. Second operand 8 states and 202 transitions. [2024-06-21 21:58:10,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 202 transitions, 1828 flow [2024-06-21 21:58:10,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 202 transitions, 1730 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:58:10,723 INFO L231 Difference]: Finished difference. Result has 110 places, 140 transitions, 1231 flow [2024-06-21 21:58:10,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1231, PETRI_PLACES=110, PETRI_TRANSITIONS=140} [2024-06-21 21:58:10,724 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-21 21:58:10,724 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 140 transitions, 1231 flow [2024-06-21 21:58:10,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:10,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:10,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:10,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:58:10,724 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:10,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1086807485, now seen corresponding path program 3 times [2024-06-21 21:58:10,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:10,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372401397] [2024-06-21 21:58:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:10,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:14,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:14,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372401397] [2024-06-21 21:58:14,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372401397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:14,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:14,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:14,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165185933] [2024-06-21 21:58:14,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:14,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:14,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:14,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:14,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:14,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 140 transitions, 1231 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:14,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:14,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:14,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:17,518 INFO L124 PetriNetUnfolderBase]: 7590/10652 cut-off events. [2024-06-21 21:58:17,519 INFO L125 PetriNetUnfolderBase]: For 127547/127547 co-relation queries the response was YES. [2024-06-21 21:58:17,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54343 conditions, 10652 events. 7590/10652 cut-off events. For 127547/127547 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 56996 event pairs, 2884 based on Foata normal form. 24/10670 useless extension candidates. Maximal degree in co-relation 54299. Up to 10059 conditions per place. [2024-06-21 21:58:17,597 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 144 selfloop transitions, 51 changer transitions 0/201 dead transitions. [2024-06-21 21:58:17,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 201 transitions, 1853 flow [2024-06-21 21:58:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:17,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 21:58:17,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-21 21:58:17,600 INFO L175 Difference]: Start difference. First operand has 110 places, 140 transitions, 1231 flow. Second operand 8 states and 197 transitions. [2024-06-21 21:58:17,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 201 transitions, 1853 flow [2024-06-21 21:58:17,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 201 transitions, 1782 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:17,827 INFO L231 Difference]: Finished difference. Result has 112 places, 142 transitions, 1320 flow [2024-06-21 21:58:17,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=112, PETRI_TRANSITIONS=142} [2024-06-21 21:58:17,827 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-21 21:58:17,827 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 142 transitions, 1320 flow [2024-06-21 21:58:17,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:17,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:17,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:17,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:58:17,828 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:17,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1086623035, now seen corresponding path program 1 times [2024-06-21 21:58:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558235753] [2024-06-21 21:58:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:21,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558235753] [2024-06-21 21:58:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558235753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:21,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:21,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:21,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017178096] [2024-06-21 21:58:21,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:21,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:21,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:21,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:21,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:21,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:21,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 142 transitions, 1320 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:21,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:21,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:21,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:24,047 INFO L124 PetriNetUnfolderBase]: 7702/10844 cut-off events. [2024-06-21 21:58:24,047 INFO L125 PetriNetUnfolderBase]: For 143658/143658 co-relation queries the response was YES. [2024-06-21 21:58:24,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56649 conditions, 10844 events. 7702/10844 cut-off events. For 143658/143658 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 58603 event pairs, 2868 based on Foata normal form. 18/10856 useless extension candidates. Maximal degree in co-relation 56604. Up to 9791 conditions per place. [2024-06-21 21:58:24,122 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 143 selfloop transitions, 58 changer transitions 0/207 dead transitions. [2024-06-21 21:58:24,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 207 transitions, 1987 flow [2024-06-21 21:58:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 21:58:24,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 21:58:24,124 INFO L175 Difference]: Start difference. First operand has 112 places, 142 transitions, 1320 flow. Second operand 8 states and 199 transitions. [2024-06-21 21:58:24,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 207 transitions, 1987 flow [2024-06-21 21:58:24,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 207 transitions, 1865 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:24,234 INFO L231 Difference]: Finished difference. Result has 115 places, 145 transitions, 1412 flow [2024-06-21 21:58:24,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=115, PETRI_TRANSITIONS=145} [2024-06-21 21:58:24,235 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-21 21:58:24,236 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 145 transitions, 1412 flow [2024-06-21 21:58:24,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:24,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:24,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:24,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:58:24,236 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:24,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:24,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1283255345, now seen corresponding path program 4 times [2024-06-21 21:58:24,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:24,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478667344] [2024-06-21 21:58:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:24,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:27,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478667344] [2024-06-21 21:58:27,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478667344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:27,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:27,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621310685] [2024-06-21 21:58:27,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:27,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:27,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:27,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:27,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:27,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 145 transitions, 1412 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:27,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:27,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:27,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:30,347 INFO L124 PetriNetUnfolderBase]: 7799/10996 cut-off events. [2024-06-21 21:58:30,347 INFO L125 PetriNetUnfolderBase]: For 161116/161116 co-relation queries the response was YES. [2024-06-21 21:58:30,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58779 conditions, 10996 events. 7799/10996 cut-off events. For 161116/161116 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 59606 event pairs, 2945 based on Foata normal form. 24/11007 useless extension candidates. Maximal degree in co-relation 58732. Up to 10382 conditions per place. [2024-06-21 21:58:30,430 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 147 selfloop transitions, 50 changer transitions 0/203 dead transitions. [2024-06-21 21:58:30,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 203 transitions, 2042 flow [2024-06-21 21:58:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 21:58:30,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-21 21:58:30,433 INFO L175 Difference]: Start difference. First operand has 115 places, 145 transitions, 1412 flow. Second operand 8 states and 193 transitions. [2024-06-21 21:58:30,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 203 transitions, 2042 flow [2024-06-21 21:58:30,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 203 transitions, 1913 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:58:30,554 INFO L231 Difference]: Finished difference. Result has 118 places, 147 transitions, 1449 flow [2024-06-21 21:58:30,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=118, PETRI_TRANSITIONS=147} [2024-06-21 21:58:30,555 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-21 21:58:30,555 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 147 transitions, 1449 flow [2024-06-21 21:58:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:30,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:30,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:58:30,556 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:30,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1357336661, now seen corresponding path program 2 times [2024-06-21 21:58:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:30,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725645163] [2024-06-21 21:58:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:33,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:33,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725645163] [2024-06-21 21:58:33,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725645163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:33,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:33,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:33,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315563846] [2024-06-21 21:58:33,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:33,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:33,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:33,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:33,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:33,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:33,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 147 transitions, 1449 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:33,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:33,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:33,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:36,402 INFO L124 PetriNetUnfolderBase]: 7911/11188 cut-off events. [2024-06-21 21:58:36,402 INFO L125 PetriNetUnfolderBase]: For 179981/179981 co-relation queries the response was YES. [2024-06-21 21:58:36,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60725 conditions, 11188 events. 7911/11188 cut-off events. For 179981/179981 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 60920 event pairs, 2945 based on Foata normal form. 18/11193 useless extension candidates. Maximal degree in co-relation 60677. Up to 10364 conditions per place. [2024-06-21 21:58:36,488 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 150 selfloop transitions, 53 changer transitions 0/209 dead transitions. [2024-06-21 21:58:36,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 209 transitions, 2111 flow [2024-06-21 21:58:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 21:58:36,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 21:58:36,490 INFO L175 Difference]: Start difference. First operand has 118 places, 147 transitions, 1449 flow. Second operand 8 states and 196 transitions. [2024-06-21 21:58:36,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 209 transitions, 2111 flow [2024-06-21 21:58:36,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 209 transitions, 1983 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:36,631 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1496 flow [2024-06-21 21:58:36,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1496, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2024-06-21 21:58:36,631 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-21 21:58:36,631 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1496 flow [2024-06-21 21:58:36,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:36,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:36,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:36,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:58:36,632 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:36,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1190203631, now seen corresponding path program 3 times [2024-06-21 21:58:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:36,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040424366] [2024-06-21 21:58:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:40,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040424366] [2024-06-21 21:58:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040424366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:40,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:40,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:40,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741190456] [2024-06-21 21:58:40,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:40,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:40,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:40,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:40,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1496 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:40,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:40,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:40,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:42,688 INFO L124 PetriNetUnfolderBase]: 7872/11131 cut-off events. [2024-06-21 21:58:42,688 INFO L125 PetriNetUnfolderBase]: For 191659/191659 co-relation queries the response was YES. [2024-06-21 21:58:42,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60945 conditions, 11131 events. 7872/11131 cut-off events. For 191659/191659 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 60364 event pairs, 2578 based on Foata normal form. 18/11136 useless extension candidates. Maximal degree in co-relation 60896. Up to 9445 conditions per place. [2024-06-21 21:58:42,771 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 134 selfloop transitions, 69 changer transitions 0/209 dead transitions. [2024-06-21 21:58:42,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 209 transitions, 2112 flow [2024-06-21 21:58:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 21:58:42,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 21:58:42,773 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1496 flow. Second operand 8 states and 195 transitions. [2024-06-21 21:58:42,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 209 transitions, 2112 flow [2024-06-21 21:58:42,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 209 transitions, 1967 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:42,932 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1520 flow [2024-06-21 21:58:42,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1520, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2024-06-21 21:58:42,932 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-21 21:58:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1520 flow [2024-06-21 21:58:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:42,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:42,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:42,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:58:42,933 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:42,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash -516414229, now seen corresponding path program 1 times [2024-06-21 21:58:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:42,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411631388] [2024-06-21 21:58:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:44,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:44,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411631388] [2024-06-21 21:58:44,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411631388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:44,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:44,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:58:44,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155731017] [2024-06-21 21:58:44,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:44,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:58:44,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:44,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:58:44,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:58:44,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 21:58:44,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1520 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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 21:58:44,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:44,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 21:58:44,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:47,090 INFO L124 PetriNetUnfolderBase]: 7455/10688 cut-off events. [2024-06-21 21:58:47,090 INFO L125 PetriNetUnfolderBase]: For 194799/194802 co-relation queries the response was YES. [2024-06-21 21:58:47,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59097 conditions, 10688 events. 7455/10688 cut-off events. For 194799/194802 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 59715 event pairs, 2921 based on Foata normal form. 10/10657 useless extension candidates. Maximal degree in co-relation 59047. Up to 10164 conditions per place. [2024-06-21 21:58:47,168 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 148 selfloop transitions, 17 changer transitions 0/184 dead transitions. [2024-06-21 21:58:47,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 184 transitions, 2068 flow [2024-06-21 21:58:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:58:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:58:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 21:58:47,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:58:47,169 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1520 flow. Second operand 5 states and 125 transitions. [2024-06-21 21:58:47,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 184 transitions, 2068 flow [2024-06-21 21:58:47,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 184 transitions, 1887 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:47,333 INFO L231 Difference]: Finished difference. Result has 121 places, 160 transitions, 1496 flow [2024-06-21 21:58:47,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1496, PETRI_PLACES=121, PETRI_TRANSITIONS=160} [2024-06-21 21:58:47,333 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-21 21:58:47,333 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 160 transitions, 1496 flow [2024-06-21 21:58:47,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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 21:58:47,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:47,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:58:47,334 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:47,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2041814587, now seen corresponding path program 1 times [2024-06-21 21:58:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315389332] [2024-06-21 21:58:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:47,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:49,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315389332] [2024-06-21 21:58:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315389332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:49,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:49,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:58:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397978458] [2024-06-21 21:58:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:49,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:58:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:58:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:58:49,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:49,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 160 transitions, 1496 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:49,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:49,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:49,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:51,778 INFO L124 PetriNetUnfolderBase]: 7917/11202 cut-off events. [2024-06-21 21:58:51,778 INFO L125 PetriNetUnfolderBase]: For 215312/215318 co-relation queries the response was YES. [2024-06-21 21:58:51,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64283 conditions, 11202 events. 7917/11202 cut-off events. For 215312/215318 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 61126 event pairs, 2930 based on Foata normal form. 6/11203 useless extension candidates. Maximal degree in co-relation 64231. Up to 10944 conditions per place. [2024-06-21 21:58:51,851 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 170 selfloop transitions, 21 changer transitions 0/197 dead transitions. [2024-06-21 21:58:51,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 197 transitions, 2188 flow [2024-06-21 21:58:51,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:58:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:58:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 21:58:51,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-21 21:58:51,853 INFO L175 Difference]: Start difference. First operand has 121 places, 160 transitions, 1496 flow. Second operand 6 states and 139 transitions. [2024-06-21 21:58:51,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 197 transitions, 2188 flow [2024-06-21 21:58:51,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 197 transitions, 2140 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-21 21:58:51,996 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 1651 flow [2024-06-21 21:58:51,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1651, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2024-06-21 21:58:51,997 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 21:58:51,997 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 1651 flow [2024-06-21 21:58:51,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:51,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:51,997 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 21:58:51,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:58:51,997 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:51,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2036274577, now seen corresponding path program 2 times [2024-06-21 21:58:51,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:51,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115232858] [2024-06-21 21:58:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:51,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:53,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:53,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115232858] [2024-06-21 21:58:53,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115232858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:53,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:53,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:58:53,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001144458] [2024-06-21 21:58:53,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:53,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:58:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:58:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:58:53,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:58:53,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 1651 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:53,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:53,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:58:53,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:56,253 INFO L124 PetriNetUnfolderBase]: 7910/11193 cut-off events. [2024-06-21 21:58:56,253 INFO L125 PetriNetUnfolderBase]: For 237107/237113 co-relation queries the response was YES. [2024-06-21 21:58:56,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66436 conditions, 11193 events. 7910/11193 cut-off events. For 237107/237113 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 61161 event pairs, 2930 based on Foata normal form. 6/11194 useless extension candidates. Maximal degree in co-relation 66381. Up to 10948 conditions per place. [2024-06-21 21:58:56,349 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 167 selfloop transitions, 17 changer transitions 0/190 dead transitions. [2024-06-21 21:58:56,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 190 transitions, 2083 flow [2024-06-21 21:58:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:58:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:58:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 21:58:56,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 21:58:56,351 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 1651 flow. Second operand 5 states and 118 transitions. [2024-06-21 21:58:56,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 190 transitions, 2083 flow [2024-06-21 21:58:56,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 190 transitions, 1959 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-21 21:58:56,584 INFO L231 Difference]: Finished difference. Result has 129 places, 168 transitions, 1575 flow [2024-06-21 21:58:56,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1575, PETRI_PLACES=129, PETRI_TRANSITIONS=168} [2024-06-21 21:58:56,584 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-21 21:58:56,584 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 168 transitions, 1575 flow [2024-06-21 21:58:56,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:56,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:56,584 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 21:58:56,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:58:56,585 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:58:56,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1617060716, now seen corresponding path program 1 times [2024-06-21 21:58:56,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:56,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135940137] [2024-06-21 21:58:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:56,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:59,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135940137] [2024-06-21 21:58:59,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135940137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:59,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:59,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:58:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954575055] [2024-06-21 21:58:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:58:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:58:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:58:59,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 21:58:59,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 168 transitions, 1575 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:59,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:59,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 21:58:59,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:02,255 INFO L124 PetriNetUnfolderBase]: 7991/11431 cut-off events. [2024-06-21 21:59:02,255 INFO L125 PetriNetUnfolderBase]: For 262628/262654 co-relation queries the response was YES. [2024-06-21 21:59:02,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68323 conditions, 11431 events. 7991/11431 cut-off events. For 262628/262654 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 64063 event pairs, 2901 based on Foata normal form. 20/11403 useless extension candidates. Maximal degree in co-relation 68266. Up to 10509 conditions per place. [2024-06-21 21:59:02,364 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 178 selfloop transitions, 48 changer transitions 0/245 dead transitions. [2024-06-21 21:59:02,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 245 transitions, 2585 flow [2024-06-21 21:59:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:59:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:59:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 21:59:02,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 21:59:02,366 INFO L175 Difference]: Start difference. First operand has 129 places, 168 transitions, 1575 flow. Second operand 9 states and 216 transitions. [2024-06-21 21:59:02,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 245 transitions, 2585 flow [2024-06-21 21:59:02,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 245 transitions, 2551 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:02,584 INFO L231 Difference]: Finished difference. Result has 136 places, 190 transitions, 1898 flow [2024-06-21 21:59:02,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1898, PETRI_PLACES=136, PETRI_TRANSITIONS=190} [2024-06-21 21:59:02,585 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-21 21:59:02,585 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 190 transitions, 1898 flow [2024-06-21 21:59:02,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:02,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:02,585 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 21:59:02,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:59:02,585 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:02,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:02,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1300201128, now seen corresponding path program 2 times [2024-06-21 21:59:02,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:02,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162650891] [2024-06-21 21:59:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:02,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:05,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:05,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162650891] [2024-06-21 21:59:05,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162650891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:05,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:05,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863828977] [2024-06-21 21:59:05,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:05,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:05,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 21:59:05,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 190 transitions, 1898 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:05,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:05,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 21:59:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:08,214 INFO L124 PetriNetUnfolderBase]: 8152/11655 cut-off events. [2024-06-21 21:59:08,214 INFO L125 PetriNetUnfolderBase]: For 292321/292389 co-relation queries the response was YES. [2024-06-21 21:59:08,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73715 conditions, 11655 events. 8152/11655 cut-off events. For 292321/292389 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 65416 event pairs, 2914 based on Foata normal form. 27/11613 useless extension candidates. Maximal degree in co-relation 73655. Up to 10383 conditions per place. [2024-06-21 21:59:08,306 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 164 selfloop transitions, 61 changer transitions 0/244 dead transitions. [2024-06-21 21:59:08,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 244 transitions, 2860 flow [2024-06-21 21:59:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:59:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:59:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 21:59:08,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 21:59:08,308 INFO L175 Difference]: Start difference. First operand has 136 places, 190 transitions, 1898 flow. Second operand 6 states and 152 transitions. [2024-06-21 21:59:08,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 244 transitions, 2860 flow [2024-06-21 21:59:08,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 244 transitions, 2770 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-21 21:59:08,528 INFO L231 Difference]: Finished difference. Result has 141 places, 209 transitions, 2234 flow [2024-06-21 21:59:08,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2234, PETRI_PLACES=141, PETRI_TRANSITIONS=209} [2024-06-21 21:59:08,529 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-21 21:59:08,529 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 209 transitions, 2234 flow [2024-06-21 21:59:08,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:08,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:08,529 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 21:59:08,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:59:08,530 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:08,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1299815178, now seen corresponding path program 3 times [2024-06-21 21:59:08,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:08,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209069215] [2024-06-21 21:59:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:08,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:11,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209069215] [2024-06-21 21:59:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209069215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:11,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558636531] [2024-06-21 21:59:11,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:11,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:11,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 21:59:11,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 209 transitions, 2234 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:11,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:11,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 21:59:11,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:14,280 INFO L124 PetriNetUnfolderBase]: 8119/11623 cut-off events. [2024-06-21 21:59:14,281 INFO L125 PetriNetUnfolderBase]: For 318263/318335 co-relation queries the response was YES. [2024-06-21 21:59:14,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76825 conditions, 11623 events. 8119/11623 cut-off events. For 318263/318335 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65393 event pairs, 2899 based on Foata normal form. 20/11591 useless extension candidates. Maximal degree in co-relation 76762. Up to 10665 conditions per place. [2024-06-21 21:59:14,388 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 180 selfloop transitions, 50 changer transitions 0/249 dead transitions. [2024-06-21 21:59:14,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 249 transitions, 2879 flow [2024-06-21 21:59:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 21:59:14,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-21 21:59:14,390 INFO L175 Difference]: Start difference. First operand has 141 places, 209 transitions, 2234 flow. Second operand 7 states and 170 transitions. [2024-06-21 21:59:14,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 249 transitions, 2879 flow [2024-06-21 21:59:14,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 249 transitions, 2797 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-21 21:59:14,798 INFO L231 Difference]: Finished difference. Result has 148 places, 210 transitions, 2314 flow [2024-06-21 21:59:14,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2314, PETRI_PLACES=148, PETRI_TRANSITIONS=210} [2024-06-21 21:59:14,799 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-21 21:59:14,799 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 210 transitions, 2314 flow [2024-06-21 21:59:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:14,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:14,799 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 21:59:14,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:59:14,799 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:14,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1717005212, now seen corresponding path program 1 times [2024-06-21 21:59:14,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:14,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309639954] [2024-06-21 21:59:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:14,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:17,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309639954] [2024-06-21 21:59:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309639954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:17,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:17,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439397405] [2024-06-21 21:59:17,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:17,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:17,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:17,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:59:17,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 210 transitions, 2314 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:17,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:17,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:59:17,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:20,334 INFO L124 PetriNetUnfolderBase]: 8852/12464 cut-off events. [2024-06-21 21:59:20,335 INFO L125 PetriNetUnfolderBase]: For 325134/325134 co-relation queries the response was YES. [2024-06-21 21:59:20,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80711 conditions, 12464 events. 8852/12464 cut-off events. For 325134/325134 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 67881 event pairs, 2971 based on Foata normal form. 8/12465 useless extension candidates. Maximal degree in co-relation 80644. Up to 11852 conditions per place. [2024-06-21 21:59:20,455 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 229 selfloop transitions, 37 changer transitions 0/272 dead transitions. [2024-06-21 21:59:20,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 272 transitions, 3458 flow [2024-06-21 21:59:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 21:59:20,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:59:20,456 INFO L175 Difference]: Start difference. First operand has 148 places, 210 transitions, 2314 flow. Second operand 7 states and 175 transitions. [2024-06-21 21:59:20,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 272 transitions, 3458 flow [2024-06-21 21:59:20,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 272 transitions, 3349 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:20,858 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 2527 flow [2024-06-21 21:59:20,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2527, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2024-06-21 21:59:20,859 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-21 21:59:20,859 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 2527 flow [2024-06-21 21:59:20,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:20,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:20,860 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 21:59:20,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:59:20,860 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:20,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:20,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1300207080, now seen corresponding path program 2 times [2024-06-21 21:59:20,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:20,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234171185] [2024-06-21 21:59:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:20,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:23,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:23,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234171185] [2024-06-21 21:59:23,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234171185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:23,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:23,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:23,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006612775] [2024-06-21 21:59:23,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:23,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:23,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:23,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:23,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:59:23,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 2527 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:23,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:23,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:59:23,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:26,623 INFO L124 PetriNetUnfolderBase]: 8974/12633 cut-off events. [2024-06-21 21:59:26,624 INFO L125 PetriNetUnfolderBase]: For 358675/358678 co-relation queries the response was YES. [2024-06-21 21:59:26,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84885 conditions, 12633 events. 8974/12633 cut-off events. For 358675/358678 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 68754 event pairs, 2962 based on Foata normal form. 10/12638 useless extension candidates. Maximal degree in co-relation 84815. Up to 12048 conditions per place. [2024-06-21 21:59:26,741 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 243 selfloop transitions, 39 changer transitions 0/288 dead transitions. [2024-06-21 21:59:26,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 288 transitions, 3679 flow [2024-06-21 21:59:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:59:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:59:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 21:59:26,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 21:59:26,742 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 2527 flow. Second operand 8 states and 196 transitions. [2024-06-21 21:59:26,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 288 transitions, 3679 flow [2024-06-21 21:59:27,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 288 transitions, 3556 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-21 21:59:27,123 INFO L231 Difference]: Finished difference. Result has 160 places, 236 transitions, 2719 flow [2024-06-21 21:59:27,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2719, PETRI_PLACES=160, PETRI_TRANSITIONS=236} [2024-06-21 21:59:27,124 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-21 21:59:27,124 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 236 transitions, 2719 flow [2024-06-21 21:59:27,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:27,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:27,124 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 21:59:27,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:59:27,125 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:27,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:27,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1299999690, now seen corresponding path program 3 times [2024-06-21 21:59:27,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:27,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697416812] [2024-06-21 21:59:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:27,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:29,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:29,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697416812] [2024-06-21 21:59:29,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697416812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:29,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:29,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:29,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094855434] [2024-06-21 21:59:29,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:29,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:29,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:29,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:29,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:59:29,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 236 transitions, 2719 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:29,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:29,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:59:29,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:32,330 INFO L124 PetriNetUnfolderBase]: 8956/12612 cut-off events. [2024-06-21 21:59:32,330 INFO L125 PetriNetUnfolderBase]: For 380082/380082 co-relation queries the response was YES. [2024-06-21 21:59:32,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85851 conditions, 12612 events. 8956/12612 cut-off events. For 380082/380082 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 68691 event pairs, 2986 based on Foata normal form. 8/12613 useless extension candidates. Maximal degree in co-relation 85778. Up to 12038 conditions per place. [2024-06-21 21:59:32,478 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 231 selfloop transitions, 35 changer transitions 0/272 dead transitions. [2024-06-21 21:59:32,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 272 transitions, 3489 flow [2024-06-21 21:59:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:59:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:59:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 21:59:32,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:59:32,489 INFO L175 Difference]: Start difference. First operand has 160 places, 236 transitions, 2719 flow. Second operand 6 states and 150 transitions. [2024-06-21 21:59:32,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 272 transitions, 3489 flow [2024-06-21 21:59:33,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 272 transitions, 3302 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:33,004 INFO L231 Difference]: Finished difference. Result has 162 places, 236 transitions, 2613 flow [2024-06-21 21:59:33,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2613, PETRI_PLACES=162, PETRI_TRANSITIONS=236} [2024-06-21 21:59:33,004 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-21 21:59:33,004 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 236 transitions, 2613 flow [2024-06-21 21:59:33,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:33,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:33,005 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 21:59:33,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:59:33,005 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:33,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1300215016, now seen corresponding path program 1 times [2024-06-21 21:59:33,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:33,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406720695] [2024-06-21 21:59:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:33,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:36,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:36,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406720695] [2024-06-21 21:59:36,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406720695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:36,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:36,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:36,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188359028] [2024-06-21 21:59:36,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:36,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:36,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:36,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:36,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:36,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 21:59:36,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 236 transitions, 2613 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:36,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:36,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 21:59:36,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:39,145 INFO L124 PetriNetUnfolderBase]: 8400/12039 cut-off events. [2024-06-21 21:59:39,146 INFO L125 PetriNetUnfolderBase]: For 392889/392968 co-relation queries the response was YES. [2024-06-21 21:59:39,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82669 conditions, 12039 events. 8400/12039 cut-off events. For 392889/392968 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 67798 event pairs, 2919 based on Foata normal form. 18/12012 useless extension candidates. Maximal degree in co-relation 82594. Up to 11301 conditions per place. [2024-06-21 21:59:39,288 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 235 selfloop transitions, 20 changer transitions 0/274 dead transitions. [2024-06-21 21:59:39,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 274 transitions, 3387 flow [2024-06-21 21:59:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:59:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:59:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 21:59:39,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:59:39,290 INFO L175 Difference]: Start difference. First operand has 162 places, 236 transitions, 2613 flow. Second operand 6 states and 150 transitions. [2024-06-21 21:59:39,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 274 transitions, 3387 flow [2024-06-21 21:59:39,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 274 transitions, 3317 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 21:59:39,842 INFO L231 Difference]: Finished difference. Result has 163 places, 239 transitions, 2672 flow [2024-06-21 21:59:39,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2672, PETRI_PLACES=163, PETRI_TRANSITIONS=239} [2024-06-21 21:59:39,842 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-21 21:59:39,842 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 239 transitions, 2672 flow [2024-06-21 21:59:39,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:39,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:39,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:39,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:59:39,843 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:39,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1415491732, now seen corresponding path program 1 times [2024-06-21 21:59:39,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:39,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908111430] [2024-06-21 21:59:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:39,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:43,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908111430] [2024-06-21 21:59:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908111430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:43,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:43,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140881421] [2024-06-21 21:59:43,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:43,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:59:43,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 239 transitions, 2672 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:43,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:43,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:59:43,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:46,729 INFO L124 PetriNetUnfolderBase]: 9085/12778 cut-off events. [2024-06-21 21:59:46,729 INFO L125 PetriNetUnfolderBase]: For 442362/442374 co-relation queries the response was YES. [2024-06-21 21:59:46,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88931 conditions, 12778 events. 9085/12778 cut-off events. For 442362/442374 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 69738 event pairs, 3070 based on Foata normal form. 10/12779 useless extension candidates. Maximal degree in co-relation 88855. Up to 12254 conditions per place. [2024-06-21 21:59:46,847 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 229 selfloop transitions, 61 changer transitions 0/296 dead transitions. [2024-06-21 21:59:46,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 296 transitions, 3912 flow [2024-06-21 21:59:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 21:59:46,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-21 21:59:46,848 INFO L175 Difference]: Start difference. First operand has 163 places, 239 transitions, 2672 flow. Second operand 7 states and 171 transitions. [2024-06-21 21:59:46,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 296 transitions, 3912 flow [2024-06-21 21:59:47,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 296 transitions, 3819 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:47,221 INFO L231 Difference]: Finished difference. Result has 166 places, 251 transitions, 3008 flow [2024-06-21 21:59:47,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3008, PETRI_PLACES=166, PETRI_TRANSITIONS=251} [2024-06-21 21:59:47,221 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-21 21:59:47,221 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 251 transitions, 3008 flow [2024-06-21 21:59:47,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:47,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:47,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:47,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:59:47,222 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:47,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1410730132, now seen corresponding path program 2 times [2024-06-21 21:59:47,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:47,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627396617] [2024-06-21 21:59:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:47,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627396617] [2024-06-21 21:59:50,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627396617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:50,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:50,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:50,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717002410] [2024-06-21 21:59:50,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:50,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:50,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:50,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:59:50,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 251 transitions, 3008 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:50,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:50,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:59:50,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:54,056 INFO L124 PetriNetUnfolderBase]: 9123/12847 cut-off events. [2024-06-21 21:59:54,056 INFO L125 PetriNetUnfolderBase]: For 475220/475223 co-relation queries the response was YES. [2024-06-21 21:59:54,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91428 conditions, 12847 events. 9123/12847 cut-off events. For 475220/475223 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70374 event pairs, 3051 based on Foata normal form. 4/12847 useless extension candidates. Maximal degree in co-relation 91351. Up to 12400 conditions per place. [2024-06-21 21:59:54,187 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 251 selfloop transitions, 41 changer transitions 0/298 dead transitions. [2024-06-21 21:59:54,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 298 transitions, 3853 flow [2024-06-21 21:59:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 21:59:54,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-21 21:59:54,188 INFO L175 Difference]: Start difference. First operand has 166 places, 251 transitions, 3008 flow. Second operand 7 states and 163 transitions. [2024-06-21 21:59:54,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 298 transitions, 3853 flow [2024-06-21 21:59:54,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 298 transitions, 3682 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-21 21:59:54,757 INFO L231 Difference]: Finished difference. Result has 171 places, 259 transitions, 3085 flow [2024-06-21 21:59:54,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=171, PETRI_TRANSITIONS=259} [2024-06-21 21:59:54,757 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-21 21:59:54,757 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 259 transitions, 3085 flow [2024-06-21 21:59:54,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:54,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:54,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:54,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:59:54,758 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:59:54,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:54,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1677067772, now seen corresponding path program 3 times [2024-06-21 21:59:54,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:54,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152122644] [2024-06-21 21:59:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:54,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:58,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:58,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152122644] [2024-06-21 21:59:58,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152122644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:58,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:58,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:58,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344350499] [2024-06-21 21:59:58,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:58,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:58,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:58,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 21:59:58,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 259 transitions, 3085 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:58,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:58,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 21:59:58,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:01,424 INFO L124 PetriNetUnfolderBase]: 9142/12877 cut-off events. [2024-06-21 22:00:01,425 INFO L125 PetriNetUnfolderBase]: For 495935/495969 co-relation queries the response was YES. [2024-06-21 22:00:01,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91755 conditions, 12877 events. 9142/12877 cut-off events. For 495935/495969 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70563 event pairs, 3071 based on Foata normal form. 21/12886 useless extension candidates. Maximal degree in co-relation 91676. Up to 12319 conditions per place. [2024-06-21 22:00:01,572 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 232 selfloop transitions, 68 changer transitions 0/306 dead transitions. [2024-06-21 22:00:01,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 306 transitions, 4163 flow [2024-06-21 22:00:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 22:00:01,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 22:00:01,574 INFO L175 Difference]: Start difference. First operand has 171 places, 259 transitions, 3085 flow. Second operand 7 states and 167 transitions. [2024-06-21 22:00:01,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 306 transitions, 4163 flow [2024-06-21 22:00:02,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 306 transitions, 4027 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:02,231 INFO L231 Difference]: Finished difference. Result has 173 places, 263 transitions, 3185 flow [2024-06-21 22:00:02,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3185, PETRI_PLACES=173, PETRI_TRANSITIONS=263} [2024-06-21 22:00:02,232 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-21 22:00:02,232 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 263 transitions, 3185 flow [2024-06-21 22:00:02,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:02,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:02,232 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 22:00:02,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:00:02,232 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:02,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:02,232 INFO L85 PathProgramCache]: Analyzing trace with hash -208906388, now seen corresponding path program 4 times [2024-06-21 22:00:02,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:02,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952089252] [2024-06-21 22:00:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:02,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:05,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:05,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952089252] [2024-06-21 22:00:05,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952089252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:05,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:05,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:05,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912347639] [2024-06-21 22:00:05,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:05,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:05,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:00:05,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 263 transitions, 3185 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:05,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:05,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:00:05,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:08,452 INFO L124 PetriNetUnfolderBase]: 9161/12902 cut-off events. [2024-06-21 22:00:08,452 INFO L125 PetriNetUnfolderBase]: For 518134/518168 co-relation queries the response was YES. [2024-06-21 22:00:08,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92779 conditions, 12902 events. 9161/12902 cut-off events. For 518134/518168 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70750 event pairs, 3071 based on Foata normal form. 21/12911 useless extension candidates. Maximal degree in co-relation 92699. Up to 12339 conditions per place. [2024-06-21 22:00:08,623 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 223 selfloop transitions, 74 changer transitions 0/303 dead transitions. [2024-06-21 22:00:08,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 303 transitions, 4117 flow [2024-06-21 22:00:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 22:00:08,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 22:00:08,625 INFO L175 Difference]: Start difference. First operand has 173 places, 263 transitions, 3185 flow. Second operand 7 states and 161 transitions. [2024-06-21 22:00:08,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 303 transitions, 4117 flow [2024-06-21 22:00:09,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 303 transitions, 3853 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:09,377 INFO L231 Difference]: Finished difference. Result has 174 places, 267 transitions, 3176 flow [2024-06-21 22:00:09,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3176, PETRI_PLACES=174, PETRI_TRANSITIONS=267} [2024-06-21 22:00:09,378 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-06-21 22:00:09,378 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 267 transitions, 3176 flow [2024-06-21 22:00:09,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:09,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:09,378 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 22:00:09,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:00:09,378 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:09,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash -274783518, now seen corresponding path program 5 times [2024-06-21 22:00:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:09,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483308240] [2024-06-21 22:00:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:09,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483308240] [2024-06-21 22:00:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483308240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:12,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:12,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:12,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625675597] [2024-06-21 22:00:12,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:12,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:12,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:12,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:12,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:12,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:00:12,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 267 transitions, 3176 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:12,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:12,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:00:12,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:15,618 INFO L124 PetriNetUnfolderBase]: 9154/12884 cut-off events. [2024-06-21 22:00:15,618 INFO L125 PetriNetUnfolderBase]: For 538068/538087 co-relation queries the response was YES. [2024-06-21 22:00:15,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93062 conditions, 12884 events. 9154/12884 cut-off events. For 538068/538087 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70453 event pairs, 3094 based on Foata normal form. 11/12878 useless extension candidates. Maximal degree in co-relation 92982. Up to 12286 conditions per place. [2024-06-21 22:00:15,741 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 217 selfloop transitions, 80 changer transitions 0/303 dead transitions. [2024-06-21 22:00:15,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 303 transitions, 4020 flow [2024-06-21 22:00:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 22:00:15,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-21 22:00:15,742 INFO L175 Difference]: Start difference. First operand has 174 places, 267 transitions, 3176 flow. Second operand 6 states and 148 transitions. [2024-06-21 22:00:15,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 303 transitions, 4020 flow [2024-06-21 22:00:16,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 303 transitions, 3803 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 22:00:16,366 INFO L231 Difference]: Finished difference. Result has 176 places, 267 transitions, 3137 flow [2024-06-21 22:00:16,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3137, PETRI_PLACES=176, PETRI_TRANSITIONS=267} [2024-06-21 22:00:16,367 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-21 22:00:16,367 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 267 transitions, 3137 flow [2024-06-21 22:00:16,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:16,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:16,367 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 22:00:16,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:00:16,367 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:16,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash -304426338, now seen corresponding path program 6 times [2024-06-21 22:00:16,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:16,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328314231] [2024-06-21 22:00:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:16,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:19,789 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 22:00:19,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:19,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328314231] [2024-06-21 22:00:19,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328314231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:19,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:19,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:19,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758522971] [2024-06-21 22:00:19,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:19,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:19,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:19,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:00:19,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 267 transitions, 3137 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:19,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:19,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:00:19,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:23,244 INFO L124 PetriNetUnfolderBase]: 9147/12879 cut-off events. [2024-06-21 22:00:23,244 INFO L125 PetriNetUnfolderBase]: For 558971/558974 co-relation queries the response was YES. [2024-06-21 22:00:23,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93560 conditions, 12879 events. 9147/12879 cut-off events. For 558971/558974 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70466 event pairs, 3051 based on Foata normal form. 4/12879 useless extension candidates. Maximal degree in co-relation 93479. Up to 12279 conditions per place. [2024-06-21 22:00:23,390 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 235 selfloop transitions, 82 changer transitions 0/323 dead transitions. [2024-06-21 22:00:23,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 323 transitions, 3945 flow [2024-06-21 22:00:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 22:00:23,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 22:00:23,392 INFO L175 Difference]: Start difference. First operand has 176 places, 267 transitions, 3137 flow. Second operand 8 states and 196 transitions. [2024-06-21 22:00:23,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 323 transitions, 3945 flow [2024-06-21 22:00:24,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 323 transitions, 3663 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:24,180 INFO L231 Difference]: Finished difference. Result has 177 places, 267 transitions, 3062 flow [2024-06-21 22:00:24,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3062, PETRI_PLACES=177, PETRI_TRANSITIONS=267} [2024-06-21 22:00:24,181 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-06-21 22:00:24,181 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 267 transitions, 3062 flow [2024-06-21 22:00:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:24,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:24,182 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 22:00:24,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:00:24,182 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:24,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash -211755412, now seen corresponding path program 1 times [2024-06-21 22:00:24,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588237193] [2024-06-21 22:00:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:24,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:26,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:26,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588237193] [2024-06-21 22:00:26,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588237193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:26,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:26,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:26,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776144378] [2024-06-21 22:00:26,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:26,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:26,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:26,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:26,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:26,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:00:26,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 267 transitions, 3062 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:26,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:26,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:00:26,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:29,595 INFO L124 PetriNetUnfolderBase]: 9179/12921 cut-off events. [2024-06-21 22:00:29,595 INFO L125 PetriNetUnfolderBase]: For 556448/556451 co-relation queries the response was YES. [2024-06-21 22:00:29,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93954 conditions, 12921 events. 9179/12921 cut-off events. For 556448/556451 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70678 event pairs, 2892 based on Foata normal form. 6/12922 useless extension candidates. Maximal degree in co-relation 93873. Up to 12490 conditions per place. [2024-06-21 22:00:29,716 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 278 selfloop transitions, 29 changer transitions 0/313 dead transitions. [2024-06-21 22:00:29,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 313 transitions, 4108 flow [2024-06-21 22:00:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 22:00:29,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-21 22:00:29,718 INFO L175 Difference]: Start difference. First operand has 177 places, 267 transitions, 3062 flow. Second operand 7 states and 163 transitions. [2024-06-21 22:00:29,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 313 transitions, 4108 flow [2024-06-21 22:00:30,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 313 transitions, 3914 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 22:00:30,204 INFO L231 Difference]: Finished difference. Result has 176 places, 273 transitions, 3128 flow [2024-06-21 22:00:30,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3128, PETRI_PLACES=176, PETRI_TRANSITIONS=273} [2024-06-21 22:00:30,205 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-21 22:00:30,205 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 273 transitions, 3128 flow [2024-06-21 22:00:30,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:30,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:30,205 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 22:00:30,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:00:30,205 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:30,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -208898452, now seen corresponding path program 2 times [2024-06-21 22:00:30,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:30,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756086668] [2024-06-21 22:00:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:30,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:32,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:32,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756086668] [2024-06-21 22:00:32,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756086668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:32,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:32,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693073798] [2024-06-21 22:00:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:32,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:32,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:32,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:00:32,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 273 transitions, 3128 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:32,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:32,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:00:32,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:35,938 INFO L124 PetriNetUnfolderBase]: 9211/12966 cut-off events. [2024-06-21 22:00:35,938 INFO L125 PetriNetUnfolderBase]: For 543363/543366 co-relation queries the response was YES. [2024-06-21 22:00:35,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94246 conditions, 12966 events. 9211/12966 cut-off events. For 543363/543366 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 71058 event pairs, 3042 based on Foata normal form. 6/12967 useless extension candidates. Maximal degree in co-relation 94165. Up to 12612 conditions per place. [2024-06-21 22:00:36,058 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 279 selfloop transitions, 24 changer transitions 0/309 dead transitions. [2024-06-21 22:00:36,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 309 transitions, 3924 flow [2024-06-21 22:00:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 22:00:36,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:00:36,059 INFO L175 Difference]: Start difference. First operand has 176 places, 273 transitions, 3128 flow. Second operand 7 states and 156 transitions. [2024-06-21 22:00:36,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 309 transitions, 3924 flow [2024-06-21 22:00:36,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 309 transitions, 3753 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:36,673 INFO L231 Difference]: Finished difference. Result has 180 places, 276 transitions, 3115 flow [2024-06-21 22:00:36,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2989, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3115, PETRI_PLACES=180, PETRI_TRANSITIONS=276} [2024-06-21 22:00:36,673 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-21 22:00:36,674 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 276 transitions, 3115 flow [2024-06-21 22:00:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:36,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:36,674 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 22:00:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:00:36,674 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:36,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1160855740, now seen corresponding path program 3 times [2024-06-21 22:00:36,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:36,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340339588] [2024-06-21 22:00:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:36,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:39,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:39,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340339588] [2024-06-21 22:00:39,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340339588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:39,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:39,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:39,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101472757] [2024-06-21 22:00:39,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:39,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:39,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:39,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:00:39,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 276 transitions, 3115 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:39,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:39,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:00:39,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:42,253 INFO L124 PetriNetUnfolderBase]: 9199/12949 cut-off events. [2024-06-21 22:00:42,253 INFO L125 PetriNetUnfolderBase]: For 562423/562426 co-relation queries the response was YES. [2024-06-21 22:00:42,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94241 conditions, 12949 events. 9199/12949 cut-off events. For 562423/562426 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 70871 event pairs, 2890 based on Foata normal form. 6/12950 useless extension candidates. Maximal degree in co-relation 94158. Up to 12569 conditions per place. [2024-06-21 22:00:42,385 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 279 selfloop transitions, 23 changer transitions 0/308 dead transitions. [2024-06-21 22:00:42,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 308 transitions, 3811 flow [2024-06-21 22:00:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 22:00:42,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-21 22:00:42,386 INFO L175 Difference]: Start difference. First operand has 180 places, 276 transitions, 3115 flow. Second operand 6 states and 142 transitions. [2024-06-21 22:00:42,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 308 transitions, 3811 flow [2024-06-21 22:00:43,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 308 transitions, 3667 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:43,201 INFO L231 Difference]: Finished difference. Result has 181 places, 276 transitions, 3029 flow [2024-06-21 22:00:43,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3029, PETRI_PLACES=181, PETRI_TRANSITIONS=276} [2024-06-21 22:00:43,201 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-21 22:00:43,201 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 276 transitions, 3029 flow [2024-06-21 22:00:43,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:43,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:43,202 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 22:00:43,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:00:43,202 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:43,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:43,202 INFO L85 PathProgramCache]: Analyzing trace with hash -853305708, now seen corresponding path program 1 times [2024-06-21 22:00:43,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:43,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370686740] [2024-06-21 22:00:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:43,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:44,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:44,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370686740] [2024-06-21 22:00:44,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370686740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:44,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:44,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:00:44,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929052339] [2024-06-21 22:00:44,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:44,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:00:44,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:00:44,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:00:44,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 22:00:44,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 276 transitions, 3029 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:44,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:44,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 22:00:44,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:47,667 INFO L124 PetriNetUnfolderBase]: 8120/11771 cut-off events. [2024-06-21 22:00:47,667 INFO L125 PetriNetUnfolderBase]: For 582066/582556 co-relation queries the response was YES. [2024-06-21 22:00:47,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87886 conditions, 11771 events. 8120/11771 cut-off events. For 582066/582556 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 68271 event pairs, 2777 based on Foata normal form. 8/11598 useless extension candidates. Maximal degree in co-relation 87802. Up to 10778 conditions per place. [2024-06-21 22:00:47,779 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 222 selfloop transitions, 18 changer transitions 0/294 dead transitions. [2024-06-21 22:00:47,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 294 transitions, 3557 flow [2024-06-21 22:00:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:00:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:00:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 22:00:47,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-21 22:00:47,782 INFO L175 Difference]: Start difference. First operand has 181 places, 276 transitions, 3029 flow. Second operand 5 states and 122 transitions. [2024-06-21 22:00:47,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 294 transitions, 3557 flow [2024-06-21 22:00:48,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 294 transitions, 3491 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:48,396 INFO L231 Difference]: Finished difference. Result has 181 places, 276 transitions, 3009 flow [2024-06-21 22:00:48,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3009, PETRI_PLACES=181, PETRI_TRANSITIONS=276} [2024-06-21 22:00:48,396 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-21 22:00:48,396 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 276 transitions, 3009 flow [2024-06-21 22:00:48,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:48,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:48,397 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 22:00:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:00:48,397 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:48,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1046128876, now seen corresponding path program 1 times [2024-06-21 22:00:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:48,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910832014] [2024-06-21 22:00:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:52,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910832014] [2024-06-21 22:00:52,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910832014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:52,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:52,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:52,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119551887] [2024-06-21 22:00:52,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:52,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:52,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:52,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:00:52,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 276 transitions, 3009 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:52,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:52,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:00:52,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:56,091 INFO L124 PetriNetUnfolderBase]: 9110/12828 cut-off events. [2024-06-21 22:00:56,092 INFO L125 PetriNetUnfolderBase]: For 587349/587352 co-relation queries the response was YES. [2024-06-21 22:00:56,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94437 conditions, 12828 events. 9110/12828 cut-off events. For 587349/587352 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70333 event pairs, 2970 based on Foata normal form. 4/12828 useless extension candidates. Maximal degree in co-relation 94352. Up to 12355 conditions per place. [2024-06-21 22:00:56,237 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 279 selfloop transitions, 49 changer transitions 0/334 dead transitions. [2024-06-21 22:00:56,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 334 transitions, 3931 flow [2024-06-21 22:00:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 22:00:56,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-21 22:00:56,239 INFO L175 Difference]: Start difference. First operand has 181 places, 276 transitions, 3009 flow. Second operand 8 states and 193 transitions. [2024-06-21 22:00:56,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 334 transitions, 3931 flow [2024-06-21 22:00:56,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 334 transitions, 3885 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 22:00:56,956 INFO L231 Difference]: Finished difference. Result has 185 places, 280 transitions, 3182 flow [2024-06-21 22:00:56,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3182, PETRI_PLACES=185, PETRI_TRANSITIONS=280} [2024-06-21 22:00:56,957 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-21 22:00:56,957 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 280 transitions, 3182 flow [2024-06-21 22:00:56,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:56,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:56,957 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 22:00:56,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:00:56,957 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:00:56,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash -68511148, now seen corresponding path program 2 times [2024-06-21 22:00:56,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:56,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975753376] [2024-06-21 22:00:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:00,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:00,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975753376] [2024-06-21 22:01:00,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975753376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:00,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:00,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352222852] [2024-06-21 22:01:00,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:00,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:01:00,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 280 transitions, 3182 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:00,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:00,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:01:00,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:04,620 INFO L124 PetriNetUnfolderBase]: 9155/12882 cut-off events. [2024-06-21 22:01:04,621 INFO L125 PetriNetUnfolderBase]: For 627039/627051 co-relation queries the response was YES. [2024-06-21 22:01:04,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97611 conditions, 12882 events. 9155/12882 cut-off events. For 627039/627051 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 70658 event pairs, 2989 based on Foata normal form. 10/12883 useless extension candidates. Maximal degree in co-relation 97526. Up to 12087 conditions per place. [2024-06-21 22:01:04,767 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 234 selfloop transitions, 107 changer transitions 0/347 dead transitions. [2024-06-21 22:01:04,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 347 transitions, 4662 flow [2024-06-21 22:01:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 22:01:04,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-21 22:01:04,769 INFO L175 Difference]: Start difference. First operand has 185 places, 280 transitions, 3182 flow. Second operand 8 states and 197 transitions. [2024-06-21 22:01:04,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 347 transitions, 4662 flow [2024-06-21 22:01:05,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 347 transitions, 4473 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:05,496 INFO L231 Difference]: Finished difference. Result has 187 places, 292 transitions, 3560 flow [2024-06-21 22:01:05,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3560, PETRI_PLACES=187, PETRI_TRANSITIONS=292} [2024-06-21 22:01:05,496 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-21 22:01:05,496 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 292 transitions, 3560 flow [2024-06-21 22:01:05,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:05,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:05,497 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 22:01:05,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:01:05,497 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:01:05,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash -930568936, now seen corresponding path program 3 times [2024-06-21 22:01:05,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:05,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589772275] [2024-06-21 22:01:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:05,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:09,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:09,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589772275] [2024-06-21 22:01:09,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589772275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:09,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:09,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:09,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616707286] [2024-06-21 22:01:09,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:09,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:09,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:09,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:01:09,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 292 transitions, 3560 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:09,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:09,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:01:09,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:13,041 INFO L124 PetriNetUnfolderBase]: 9174/12913 cut-off events. [2024-06-21 22:01:13,041 INFO L125 PetriNetUnfolderBase]: For 669414/669426 co-relation queries the response was YES. [2024-06-21 22:01:13,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100387 conditions, 12913 events. 9174/12913 cut-off events. For 669414/669426 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 70754 event pairs, 2989 based on Foata normal form. 10/12914 useless extension candidates. Maximal degree in co-relation 100301. Up to 12107 conditions per place. [2024-06-21 22:01:13,179 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 231 selfloop transitions, 110 changer transitions 0/347 dead transitions. [2024-06-21 22:01:13,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 347 transitions, 4820 flow [2024-06-21 22:01:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 22:01:13,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-21 22:01:13,181 INFO L175 Difference]: Start difference. First operand has 187 places, 292 transitions, 3560 flow. Second operand 8 states and 193 transitions. [2024-06-21 22:01:13,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 347 transitions, 4820 flow [2024-06-21 22:01:14,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 347 transitions, 4560 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-21 22:01:14,041 INFO L231 Difference]: Finished difference. Result has 192 places, 296 transitions, 3649 flow [2024-06-21 22:01:14,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3649, PETRI_PLACES=192, PETRI_TRANSITIONS=296} [2024-06-21 22:01:14,041 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-06-21 22:01:14,041 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 296 transitions, 3649 flow [2024-06-21 22:01:14,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:14,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:14,041 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 22:01:14,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:01:14,041 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:01:14,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash -930568595, now seen corresponding path program 1 times [2024-06-21 22:01:14,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:14,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772168076] [2024-06-21 22:01:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:14,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:18,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:18,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772168076] [2024-06-21 22:01:18,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772168076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:18,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:18,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:18,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143245948] [2024-06-21 22:01:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:18,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:18,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:18,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:18,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:01:18,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 296 transitions, 3649 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:18,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:18,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:01:18,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:21,792 INFO L124 PetriNetUnfolderBase]: 9598/13471 cut-off events. [2024-06-21 22:01:21,792 INFO L125 PetriNetUnfolderBase]: For 728377/728389 co-relation queries the response was YES. [2024-06-21 22:01:21,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106318 conditions, 13471 events. 9598/13471 cut-off events. For 728377/728389 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 73791 event pairs, 2991 based on Foata normal form. 16/13478 useless extension candidates. Maximal degree in co-relation 106230. Up to 12372 conditions per place. [2024-06-21 22:01:21,958 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 297 selfloop transitions, 104 changer transitions 0/407 dead transitions. [2024-06-21 22:01:21,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 407 transitions, 5793 flow [2024-06-21 22:01:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:01:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:01:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-21 22:01:21,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562937062937063 [2024-06-21 22:01:21,959 INFO L175 Difference]: Start difference. First operand has 192 places, 296 transitions, 3649 flow. Second operand 11 states and 261 transitions. [2024-06-21 22:01:21,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 407 transitions, 5793 flow [2024-06-21 22:01:23,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 407 transitions, 5554 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:23,632 INFO L231 Difference]: Finished difference. Result has 201 places, 327 transitions, 4157 flow [2024-06-21 22:01:23,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4157, PETRI_PLACES=201, PETRI_TRANSITIONS=327} [2024-06-21 22:01:23,633 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-21 22:01:23,633 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 327 transitions, 4157 flow [2024-06-21 22:01:23,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:23,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:23,633 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 22:01:23,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:01:23,634 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:01:23,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1430168027, now seen corresponding path program 2 times [2024-06-21 22:01:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447045735] [2024-06-21 22:01:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:27,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:27,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447045735] [2024-06-21 22:01:27,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447045735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:27,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:27,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:27,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685013961] [2024-06-21 22:01:27,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:27,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:27,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:27,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:27,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:27,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:01:27,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 327 transitions, 4157 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:27,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:27,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:01:27,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:32,133 INFO L124 PetriNetUnfolderBase]: 10078/14146 cut-off events. [2024-06-21 22:01:32,133 INFO L125 PetriNetUnfolderBase]: For 815106/815109 co-relation queries the response was YES. [2024-06-21 22:01:32,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116713 conditions, 14146 events. 10078/14146 cut-off events. For 815106/815109 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 77782 event pairs, 3007 based on Foata normal form. 18/14160 useless extension candidates. Maximal degree in co-relation 116621. Up to 12871 conditions per place. [2024-06-21 22:01:32,291 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 331 selfloop transitions, 97 changer transitions 0/434 dead transitions. [2024-06-21 22:01:32,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 434 transitions, 6181 flow [2024-06-21 22:01:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:01:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:01:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 285 transitions. [2024-06-21 22:01:32,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-21 22:01:32,293 INFO L175 Difference]: Start difference. First operand has 201 places, 327 transitions, 4157 flow. Second operand 12 states and 285 transitions. [2024-06-21 22:01:32,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 434 transitions, 6181 flow [2024-06-21 22:01:33,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 434 transitions, 5900 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:33,348 INFO L231 Difference]: Finished difference. Result has 209 places, 354 transitions, 4625 flow [2024-06-21 22:01:33,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3907, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4625, PETRI_PLACES=209, PETRI_TRANSITIONS=354} [2024-06-21 22:01:33,348 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2024-06-21 22:01:33,348 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 354 transitions, 4625 flow [2024-06-21 22:01:33,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:33,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:33,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:33,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:01:33,349 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:01:33,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash -782959336, now seen corresponding path program 4 times [2024-06-21 22:01:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629034291] [2024-06-21 22:01:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:37,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:37,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629034291] [2024-06-21 22:01:37,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629034291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:37,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:37,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:37,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188174865] [2024-06-21 22:01:37,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:37,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:37,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:37,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:37,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:37,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:01:37,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 354 transitions, 4625 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:37,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:37,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:01:37,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:41,177 INFO L124 PetriNetUnfolderBase]: 10097/14177 cut-off events. [2024-06-21 22:01:41,178 INFO L125 PetriNetUnfolderBase]: For 853663/853666 co-relation queries the response was YES. [2024-06-21 22:01:41,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120266 conditions, 14177 events. 10097/14177 cut-off events. For 853663/853666 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 78093 event pairs, 3113 based on Foata normal form. 4/14177 useless extension candidates. Maximal degree in co-relation 120171. Up to 13649 conditions per place. [2024-06-21 22:01:41,332 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 351 selfloop transitions, 45 changer transitions 0/402 dead transitions. [2024-06-21 22:01:41,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 402 transitions, 5641 flow [2024-06-21 22:01:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 22:01:41,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:01:41,333 INFO L175 Difference]: Start difference. First operand has 209 places, 354 transitions, 4625 flow. Second operand 8 states and 182 transitions. [2024-06-21 22:01:41,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 402 transitions, 5641 flow [2024-06-21 22:01:42,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 402 transitions, 5332 flow, removed 122 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:42,416 INFO L231 Difference]: Finished difference. Result has 211 places, 358 transitions, 4509 flow [2024-06-21 22:01:42,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4509, PETRI_PLACES=211, PETRI_TRANSITIONS=358} [2024-06-21 22:01:42,417 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 156 predicate places. [2024-06-21 22:01:42,417 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 358 transitions, 4509 flow [2024-06-21 22:01:42,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:42,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:42,417 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 22:01:42,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:01:42,417 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:01:42,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash -782958995, now seen corresponding path program 3 times [2024-06-21 22:01:42,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:42,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215679746] [2024-06-21 22:01:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:45,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:45,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215679746] [2024-06-21 22:01:45,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215679746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:45,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:45,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:45,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078928649] [2024-06-21 22:01:45,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:45,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:46,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:01:46,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 358 transitions, 4509 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:46,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:46,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:01:46,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:50,050 INFO L124 PetriNetUnfolderBase]: 10061/14139 cut-off events. [2024-06-21 22:01:50,050 INFO L125 PetriNetUnfolderBase]: For 869046/869049 co-relation queries the response was YES. [2024-06-21 22:01:50,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118337 conditions, 14139 events. 10061/14139 cut-off events. For 869046/869049 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 77982 event pairs, 3023 based on Foata normal form. 18/14153 useless extension candidates. Maximal degree in co-relation 118240. Up to 12876 conditions per place. [2024-06-21 22:01:50,435 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 325 selfloop transitions, 94 changer transitions 0/425 dead transitions. [2024-06-21 22:01:50,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 425 transitions, 5823 flow [2024-06-21 22:01:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:01:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:01:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-21 22:01:50,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653846153846154 [2024-06-21 22:01:50,437 INFO L175 Difference]: Start difference. First operand has 211 places, 358 transitions, 4509 flow. Second operand 10 states and 242 transitions. [2024-06-21 22:01:50,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 425 transitions, 5823 flow [2024-06-21 22:01:51,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 425 transitions, 5608 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:51,344 INFO L231 Difference]: Finished difference. Result has 215 places, 358 transitions, 4498 flow [2024-06-21 22:01:51,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4498, PETRI_PLACES=215, PETRI_TRANSITIONS=358} [2024-06-21 22:01:51,345 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-06-21 22:01:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 358 transitions, 4498 flow [2024-06-21 22:01:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:51,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:51,345 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 22:01:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:01:51,345 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:01:51,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash -782743669, now seen corresponding path program 1 times [2024-06-21 22:01:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407518839] [2024-06-21 22:01:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:55,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:55,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407518839] [2024-06-21 22:01:55,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407518839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:55,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:55,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:55,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931887175] [2024-06-21 22:01:55,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:55,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:55,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:55,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:01:55,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 358 transitions, 4498 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:55,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:55,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:01:55,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:59,548 INFO L124 PetriNetUnfolderBase]: 10082/14306 cut-off events. [2024-06-21 22:01:59,548 INFO L125 PetriNetUnfolderBase]: For 978125/978194 co-relation queries the response was YES. [2024-06-21 22:01:59,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120094 conditions, 14306 events. 10082/14306 cut-off events. For 978125/978194 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 80994 event pairs, 3019 based on Foata normal form. 82/14336 useless extension candidates. Maximal degree in co-relation 119996. Up to 12417 conditions per place. [2024-06-21 22:01:59,964 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 327 selfloop transitions, 66 changer transitions 0/425 dead transitions. [2024-06-21 22:01:59,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 425 transitions, 5748 flow [2024-06-21 22:01:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:01:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:01:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 22:01:59,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634615384615385 [2024-06-21 22:01:59,966 INFO L175 Difference]: Start difference. First operand has 215 places, 358 transitions, 4498 flow. Second operand 10 states and 241 transitions. [2024-06-21 22:01:59,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 425 transitions, 5748 flow [2024-06-21 22:02:00,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 425 transitions, 5560 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 22:02:00,877 INFO L231 Difference]: Finished difference. Result has 216 places, 360 transitions, 4533 flow [2024-06-21 22:02:00,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4310, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4533, PETRI_PLACES=216, PETRI_TRANSITIONS=360} [2024-06-21 22:02:00,878 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 161 predicate places. [2024-06-21 22:02:00,878 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 360 transitions, 4533 flow [2024-06-21 22:02:00,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:00,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:00,878 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 22:02:00,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:02:00,878 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:02:00,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash 449485876, now seen corresponding path program 5 times [2024-06-21 22:02:00,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:00,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121597354] [2024-06-21 22:02:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:00,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:04,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121597354] [2024-06-21 22:02:04,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121597354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:04,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:04,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:04,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995202296] [2024-06-21 22:02:04,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:04,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:04,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:04,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:02:04,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 360 transitions, 4533 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:04,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:04,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:02:04,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:08,589 INFO L124 PetriNetUnfolderBase]: 10676/14996 cut-off events. [2024-06-21 22:02:08,590 INFO L125 PetriNetUnfolderBase]: For 946149/946168 co-relation queries the response was YES. [2024-06-21 22:02:08,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126046 conditions, 14996 events. 10676/14996 cut-off events. For 946149/946168 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 83072 event pairs, 3280 based on Foata normal form. 11/14991 useless extension candidates. Maximal degree in co-relation 125947. Up to 14105 conditions per place. [2024-06-21 22:02:09,022 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 292 selfloop transitions, 121 changer transitions 0/419 dead transitions. [2024-06-21 22:02:09,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 419 transitions, 6035 flow [2024-06-21 22:02:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 22:02:09,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44017094017094016 [2024-06-21 22:02:09,024 INFO L175 Difference]: Start difference. First operand has 216 places, 360 transitions, 4533 flow. Second operand 9 states and 206 transitions. [2024-06-21 22:02:09,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 419 transitions, 6035 flow [2024-06-21 22:02:10,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 419 transitions, 5864 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 22:02:10,203 INFO L231 Difference]: Finished difference. Result has 218 places, 366 transitions, 4750 flow [2024-06-21 22:02:10,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4366, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4750, PETRI_PLACES=218, PETRI_TRANSITIONS=366} [2024-06-21 22:02:10,203 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 163 predicate places. [2024-06-21 22:02:10,203 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 366 transitions, 4750 flow [2024-06-21 22:02:10,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:10,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:10,204 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 22:02:10,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:02:10,204 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:02:10,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:10,205 INFO L85 PathProgramCache]: Analyzing trace with hash 449495176, now seen corresponding path program 6 times [2024-06-21 22:02:10,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:10,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820858323] [2024-06-21 22:02:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:10,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:13,919 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 22:02:13,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820858323] [2024-06-21 22:02:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820858323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:13,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:13,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:13,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338615705] [2024-06-21 22:02:13,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:13,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:13,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:13,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:02:13,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 366 transitions, 4750 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:13,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:13,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:02:13,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand