./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe000_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe000_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:45:04,599 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:45:04,670 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:45:04,675 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:45:04,676 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:45:04,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:45:04,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:45:04,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:45:04,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:45:04,700 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:45:04,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:45:04,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:45:04,701 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:45:04,701 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:45:04,702 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:45:04,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:45:04,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:45:04,702 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:45:04,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:45:04,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:45:04,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:45:04,706 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:45:04,706 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:45:04,706 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:45:04,706 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:45:04,706 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:45:04,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:45:04,707 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:45:04,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:45:04,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:45:04,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:45:04,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:45:04,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:45:04,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:45:04,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:45:04,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:45:04,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:45:04,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:45:04,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:45:04,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:45:04,710 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:45:04,710 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:45:04,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:45:04,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:45:04,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:45:04,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:45:04,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:45:04,932 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:45:04,932 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:45:04,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i [2024-06-27 18:45:06,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:45:06,265 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:45:06,266 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i [2024-06-27 18:45:06,281 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5544bbe61/b2f4b3b058424bcd9ad1abb72c4f3b02/FLAG4f112ffe1 [2024-06-27 18:45:06,292 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5544bbe61/b2f4b3b058424bcd9ad1abb72c4f3b02 [2024-06-27 18:45:06,294 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:45:06,305 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:45:06,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe000_power.oepc.yml/witness.yml [2024-06-27 18:45:06,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:45:06,515 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:45:06,516 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:45:06,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:45:06,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:45:06,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:45:06" (1/2) ... [2024-06-27 18:45:06,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337a4fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:45:06, skipping insertion in model container [2024-06-27 18:45:06,521 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:45:06" (1/2) ... [2024-06-27 18:45:06,522 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@fd26bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:45:06, skipping insertion in model container [2024-06-27 18:45:06,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:45:06" (2/2) ... [2024-06-27 18:45:06,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337a4fbc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:06, skipping insertion in model container [2024-06-27 18:45:06,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:45:06" (2/2) ... [2024-06-27 18:45:06,523 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:45:06,651 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:45:06,653 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 18:45:06,653 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 18:45:06,653 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 18:45:06,654 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:45:06,654 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 18:45:06,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:45:06,842 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i[995,1008] [2024-06-27 18:45:07,016 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:45:07,029 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:45:07,064 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:45:07,150 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:45:07,187 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:45:07,188 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07 WrapperNode [2024-06-27 18:45:07,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:45:07,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:45:07,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:45:07,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:45:07,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,247 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 223 [2024-06-27 18:45:07,247 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:45:07,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:45:07,248 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:45:07,248 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:45:07,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,262 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,279 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-27 18:45:07,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,301 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,305 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,317 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,321 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:45:07,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:45:07,322 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:45:07,322 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:45:07,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (1/1) ... [2024-06-27 18:45:07,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:45:07,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:45:07,346 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) [2024-06-27 18:45:07,361 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 [2024-06-27 18:45:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:45:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:45:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:45:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:45:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:45:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:45:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:45:07,374 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:45:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:45:07,374 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:45:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:45:07,374 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:45:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:45:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:45:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:45:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:45:07,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:45:07,378 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:45:07,531 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:45:07,533 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:45:08,054 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:45:08,055 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:45:08,379 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:45:08,379 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:45:08,380 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:45:08 BoogieIcfgContainer [2024-06-27 18:45:08,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:45:08,382 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:45:08,382 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:45:08,384 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:45:08,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:45:06" (1/4) ... [2024-06-27 18:45:08,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd143a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:45:08, skipping insertion in model container [2024-06-27 18:45:08,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:45:06" (2/4) ... [2024-06-27 18:45:08,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd143a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:45:08, skipping insertion in model container [2024-06-27 18:45:08,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:45:07" (3/4) ... [2024-06-27 18:45:08,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd143a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:45:08, skipping insertion in model container [2024-06-27 18:45:08,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:45:08" (4/4) ... [2024-06-27 18:45:08,387 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_power.oepc.i [2024-06-27 18:45:08,401 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:45:08,402 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:45:08,402 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:45:08,465 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:45:08,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:45:08,527 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:45:08,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:45:08,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:45:08,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:45:08,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:45:08,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:45:08,628 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;@2537f6f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:45:08,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:45:08,635 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:45:08,636 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:45:08,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:45:08,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:08,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:45:08,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:08,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash 877865398, now seen corresponding path program 1 times [2024-06-27 18:45:08,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:08,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278142172] [2024-06-27 18:45:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:08,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:10,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278142172] [2024-06-27 18:45:10,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278142172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:10,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:10,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:45:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869621757] [2024-06-27 18:45:10,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:10,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:45:10,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:45:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:45:10,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:45:10,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:10,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:10,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:45:10,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:11,426 INFO L124 PetriNetUnfolderBase]: 3347/5170 cut-off events. [2024-06-27 18:45:11,427 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 18:45:11,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10081 conditions, 5170 events. 3347/5170 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29832 event pairs, 1959 based on Foata normal form. 0/4989 useless extension candidates. Maximal degree in co-relation 10069. Up to 4819 conditions per place. [2024-06-27 18:45:11,452 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 46 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 18:45:11,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 235 flow [2024-06-27 18:45:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:45:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:45:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-27 18:45:11,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:45:11,463 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 90 transitions. [2024-06-27 18:45:11,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 235 flow [2024-06-27 18:45:11,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 230 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:45:11,469 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:45:11,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 18:45:11,472 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:45:11,473 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:45:11,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:11,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:11,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:11,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:45:11,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:11,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1815094837, now seen corresponding path program 1 times [2024-06-27 18:45:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:11,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099306199] [2024-06-27 18:45:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:11,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:13,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099306199] [2024-06-27 18:45:13,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099306199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:13,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:13,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:45:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855113900] [2024-06-27 18:45:13,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:13,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:45:13,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:45:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:45:13,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:45:13,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:13,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:13,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:45:13,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:14,881 INFO L124 PetriNetUnfolderBase]: 3338/4924 cut-off events. [2024-06-27 18:45:14,881 INFO L125 PetriNetUnfolderBase]: For 808/812 co-relation queries the response was YES. [2024-06-27 18:45:14,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10996 conditions, 4924 events. 3338/4924 cut-off events. For 808/812 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 27060 event pairs, 1409 based on Foata normal form. 6/4926 useless extension candidates. Maximal degree in co-relation 10984. Up to 4746 conditions per place. [2024-06-27 18:45:14,903 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 64 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-27 18:45:14,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 367 flow [2024-06-27 18:45:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:45:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:45:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 18:45:14,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-06-27 18:45:14,906 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 122 transitions. [2024-06-27 18:45:14,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 367 flow [2024-06-27 18:45:14,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:45:14,908 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:45:14,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 18:45:14,909 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:45:14,909 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:45:14,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:14,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:14,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:14,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:45:14,910 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:14,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash 433366328, now seen corresponding path program 1 times [2024-06-27 18:45:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:14,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63200146] [2024-06-27 18:45:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:17,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:17,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63200146] [2024-06-27 18:45:17,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63200146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:17,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:17,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:45:17,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866016608] [2024-06-27 18:45:17,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:17,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:45:17,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:17,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:45:17,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:45:17,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:17,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:17,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:17,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:17,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:18,693 INFO L124 PetriNetUnfolderBase]: 4039/5917 cut-off events. [2024-06-27 18:45:18,693 INFO L125 PetriNetUnfolderBase]: For 2961/2961 co-relation queries the response was YES. [2024-06-27 18:45:18,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14712 conditions, 5917 events. 4039/5917 cut-off events. For 2961/2961 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 32371 event pairs, 1293 based on Foata normal form. 4/5918 useless extension candidates. Maximal degree in co-relation 14697. Up to 5678 conditions per place. [2024-06-27 18:45:18,724 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 91 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2024-06-27 18:45:18,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 564 flow [2024-06-27 18:45:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:45:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:45:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 18:45:18,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340425531914894 [2024-06-27 18:45:18,726 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 5 states and 149 transitions. [2024-06-27 18:45:18,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 564 flow [2024-06-27 18:45:18,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 564 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:45:18,730 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 307 flow [2024-06-27 18:45:18,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-27 18:45:18,731 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2024-06-27 18:45:18,731 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 307 flow [2024-06-27 18:45:18,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:18,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:18,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:18,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:45:18,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:18,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash -146746153, now seen corresponding path program 1 times [2024-06-27 18:45:18,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:18,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951580286] [2024-06-27 18:45:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:18,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:21,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951580286] [2024-06-27 18:45:21,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951580286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:21,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:21,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:45:21,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076961268] [2024-06-27 18:45:21,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:21,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:45:21,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:45:21,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:45:21,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:21,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:21,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:21,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:21,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:22,971 INFO L124 PetriNetUnfolderBase]: 4025/5895 cut-off events. [2024-06-27 18:45:22,972 INFO L125 PetriNetUnfolderBase]: For 4625/4625 co-relation queries the response was YES. [2024-06-27 18:45:22,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15984 conditions, 5895 events. 4025/5895 cut-off events. For 4625/4625 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 32278 event pairs, 878 based on Foata normal form. 8/5900 useless extension candidates. Maximal degree in co-relation 15964. Up to 5548 conditions per place. [2024-06-27 18:45:22,998 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 103 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-06-27 18:45:22,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 124 transitions, 689 flow [2024-06-27 18:45:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:45:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:45:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 18:45:23,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 18:45:23,000 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 307 flow. Second operand 6 states and 174 transitions. [2024-06-27 18:45:23,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 124 transitions, 689 flow [2024-06-27 18:45:23,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 124 transitions, 687 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 18:45:23,007 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 348 flow [2024-06-27 18:45:23,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-27 18:45:23,008 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-27 18:45:23,008 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 348 flow [2024-06-27 18:45:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:23,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:23,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:23,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:45:23,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:23,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash 867960496, now seen corresponding path program 1 times [2024-06-27 18:45:23,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:23,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130455734] [2024-06-27 18:45:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:24,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:24,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130455734] [2024-06-27 18:45:24,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130455734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:24,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:24,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:45:24,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204633799] [2024-06-27 18:45:24,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:24,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:45:24,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:45:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:45:24,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:45:24,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 348 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) [2024-06-27 18:45:24,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:24,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:45:24,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:26,038 INFO L124 PetriNetUnfolderBase]: 4015/6160 cut-off events. [2024-06-27 18:45:26,038 INFO L125 PetriNetUnfolderBase]: For 6897/6897 co-relation queries the response was YES. [2024-06-27 18:45:26,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17051 conditions, 6160 events. 4015/6160 cut-off events. For 6897/6897 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34881 event pairs, 1620 based on Foata normal form. 4/6160 useless extension candidates. Maximal degree in co-relation 17027. Up to 5710 conditions per place. [2024-06-27 18:45:26,070 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 79 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-06-27 18:45:26,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 638 flow [2024-06-27 18:45:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:45:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:45:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 18:45:26,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502127659574468 [2024-06-27 18:45:26,073 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 348 flow. Second operand 5 states and 118 transitions. [2024-06-27 18:45:26,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 638 flow [2024-06-27 18:45:26,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 603 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:26,080 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 419 flow [2024-06-27 18:45:26,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-27 18:45:26,081 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2024-06-27 18:45:26,081 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 419 flow [2024-06-27 18:45:26,081 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) [2024-06-27 18:45:26,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:26,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:26,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:45:26,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:26,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:26,082 INFO L85 PathProgramCache]: Analyzing trace with hash 708954741, now seen corresponding path program 1 times [2024-06-27 18:45:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:26,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901047183] [2024-06-27 18:45:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:26,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:29,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:29,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901047183] [2024-06-27 18:45:29,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901047183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:29,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:29,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:29,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525371880] [2024-06-27 18:45:29,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:29,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:29,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:45:29,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 419 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) [2024-06-27 18:45:29,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:29,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:45:29,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:31,047 INFO L124 PetriNetUnfolderBase]: 4069/5984 cut-off events. [2024-06-27 18:45:31,047 INFO L125 PetriNetUnfolderBase]: For 8723/8726 co-relation queries the response was YES. [2024-06-27 18:45:31,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18165 conditions, 5984 events. 4069/5984 cut-off events. For 8723/8726 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32948 event pairs, 1178 based on Foata normal form. 5/5985 useless extension candidates. Maximal degree in co-relation 18138. Up to 5508 conditions per place. [2024-06-27 18:45:31,087 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 104 selfloop transitions, 29 changer transitions 0/139 dead transitions. [2024-06-27 18:45:31,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 139 transitions, 901 flow [2024-06-27 18:45:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 18:45:31,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562310030395137 [2024-06-27 18:45:31,089 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 419 flow. Second operand 7 states and 183 transitions. [2024-06-27 18:45:31,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 139 transitions, 901 flow [2024-06-27 18:45:31,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 139 transitions, 893 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 18:45:31,098 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 523 flow [2024-06-27 18:45:31,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-27 18:45:31,099 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 24 predicate places. [2024-06-27 18:45:31,099 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 523 flow [2024-06-27 18:45:31,099 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) [2024-06-27 18:45:31,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:31,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:31,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:45:31,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:31,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash 709074711, now seen corresponding path program 2 times [2024-06-27 18:45:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:31,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278307390] [2024-06-27 18:45:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:31,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:33,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278307390] [2024-06-27 18:45:33,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278307390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:33,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:33,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:33,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119427764] [2024-06-27 18:45:33,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:33,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:33,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:34,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:45:34,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 523 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) [2024-06-27 18:45:34,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:34,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:45:34,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:35,811 INFO L124 PetriNetUnfolderBase]: 4177/6152 cut-off events. [2024-06-27 18:45:35,812 INFO L125 PetriNetUnfolderBase]: For 12372/12375 co-relation queries the response was YES. [2024-06-27 18:45:35,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20090 conditions, 6152 events. 4177/6152 cut-off events. For 12372/12375 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34082 event pairs, 1162 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 20060. Up to 5734 conditions per place. [2024-06-27 18:45:35,842 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 106 selfloop transitions, 27 changer transitions 0/139 dead transitions. [2024-06-27 18:45:35,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 139 transitions, 986 flow [2024-06-27 18:45:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:45:35,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 18:45:35,844 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 523 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:45:35,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 139 transitions, 986 flow [2024-06-27 18:45:35,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 139 transitions, 918 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:35,855 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 578 flow [2024-06-27 18:45:35,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=578, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-27 18:45:35,856 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2024-06-27 18:45:35,856 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 578 flow [2024-06-27 18:45:35,856 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) [2024-06-27 18:45:35,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:35,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:35,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:45:35,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:35,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 408322161, now seen corresponding path program 1 times [2024-06-27 18:45:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:35,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970501341] [2024-06-27 18:45:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:35,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:38,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:38,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970501341] [2024-06-27 18:45:38,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970501341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:38,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:38,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:38,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747372489] [2024-06-27 18:45:38,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:38,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:38,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:38,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:45:38,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 578 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) [2024-06-27 18:45:38,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:38,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:45:38,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:40,506 INFO L124 PetriNetUnfolderBase]: 4873/7160 cut-off events. [2024-06-27 18:45:40,506 INFO L125 PetriNetUnfolderBase]: For 13654/13657 co-relation queries the response was YES. [2024-06-27 18:45:40,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22674 conditions, 7160 events. 4873/7160 cut-off events. For 13654/13657 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 39695 event pairs, 1220 based on Foata normal form. 12/7168 useless extension candidates. Maximal degree in co-relation 22643. Up to 6202 conditions per place. [2024-06-27 18:45:40,535 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 134 selfloop transitions, 41 changer transitions 0/181 dead transitions. [2024-06-27 18:45:40,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 181 transitions, 1248 flow [2024-06-27 18:45:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:45:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:45:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:45:40,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 18:45:40,538 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 578 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:45:40,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 181 transitions, 1248 flow [2024-06-27 18:45:40,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 181 transitions, 1190 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:40,552 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 731 flow [2024-06-27 18:45:40,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=731, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-06-27 18:45:40,553 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 34 predicate places. [2024-06-27 18:45:40,553 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 731 flow [2024-06-27 18:45:40,553 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) [2024-06-27 18:45:40,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:40,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:40,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:45:40,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:40,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:40,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1804807569, now seen corresponding path program 2 times [2024-06-27 18:45:40,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:40,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241773016] [2024-06-27 18:45:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:42,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:42,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241773016] [2024-06-27 18:45:42,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241773016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:42,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:42,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:42,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121722497] [2024-06-27 18:45:42,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:42,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:42,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:42,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:45:42,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 731 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) [2024-06-27 18:45:42,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:42,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:45:42,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:44,471 INFO L124 PetriNetUnfolderBase]: 4957/7278 cut-off events. [2024-06-27 18:45:44,471 INFO L125 PetriNetUnfolderBase]: For 21431/21434 co-relation queries the response was YES. [2024-06-27 18:45:44,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26804 conditions, 7278 events. 4957/7278 cut-off events. For 21431/21434 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 40338 event pairs, 1209 based on Foata normal form. 12/7286 useless extension candidates. Maximal degree in co-relation 26770. Up to 6267 conditions per place. [2024-06-27 18:45:44,582 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 108 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2024-06-27 18:45:44,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 159 transitions, 1237 flow [2024-06-27 18:45:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 18:45:44,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 18:45:44,585 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 731 flow. Second operand 7 states and 179 transitions. [2024-06-27 18:45:44,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 159 transitions, 1237 flow [2024-06-27 18:45:44,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 159 transitions, 1181 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:44,614 INFO L231 Difference]: Finished difference. Result has 89 places, 107 transitions, 852 flow [2024-06-27 18:45:44,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=852, PETRI_PLACES=89, PETRI_TRANSITIONS=107} [2024-06-27 18:45:44,615 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 38 predicate places. [2024-06-27 18:45:44,615 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 107 transitions, 852 flow [2024-06-27 18:45:44,620 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) [2024-06-27 18:45:44,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:44,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:44,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:45:44,620 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:44,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1804807755, now seen corresponding path program 3 times [2024-06-27 18:45:44,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:44,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824559705] [2024-06-27 18:45:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:47,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:47,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824559705] [2024-06-27 18:45:47,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824559705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:47,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:47,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:47,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274607679] [2024-06-27 18:45:47,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:47,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:47,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:47,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:45:47,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 107 transitions, 852 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) [2024-06-27 18:45:47,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:47,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:45:47,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:49,411 INFO L124 PetriNetUnfolderBase]: 4949/7243 cut-off events. [2024-06-27 18:45:49,411 INFO L125 PetriNetUnfolderBase]: For 24913/24916 co-relation queries the response was YES. [2024-06-27 18:45:49,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28451 conditions, 7243 events. 4949/7243 cut-off events. For 24913/24916 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 39940 event pairs, 1272 based on Foata normal form. 5/7244 useless extension candidates. Maximal degree in co-relation 28414. Up to 6681 conditions per place. [2024-06-27 18:45:49,445 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 116 selfloop transitions, 32 changer transitions 0/154 dead transitions. [2024-06-27 18:45:49,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 154 transitions, 1292 flow [2024-06-27 18:45:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:45:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:45:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 18:45:49,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:45:49,447 INFO L175 Difference]: Start difference. First operand has 89 places, 107 transitions, 852 flow. Second operand 6 states and 156 transitions. [2024-06-27 18:45:49,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 154 transitions, 1292 flow [2024-06-27 18:45:49,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 1213 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:49,487 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 853 flow [2024-06-27 18:45:49,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=853, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-27 18:45:49,488 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2024-06-27 18:45:49,488 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 853 flow [2024-06-27 18:45:49,488 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) [2024-06-27 18:45:49,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:49,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:49,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:45:49,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:49,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1804570419, now seen corresponding path program 3 times [2024-06-27 18:45:49,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:49,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722210407] [2024-06-27 18:45:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:51,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722210407] [2024-06-27 18:45:51,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722210407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:51,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:51,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:51,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278145700] [2024-06-27 18:45:51,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:51,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:51,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:51,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:45:51,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 853 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) [2024-06-27 18:45:51,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:51,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:45:51,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:53,428 INFO L124 PetriNetUnfolderBase]: 4949/7201 cut-off events. [2024-06-27 18:45:53,428 INFO L125 PetriNetUnfolderBase]: For 26019/26033 co-relation queries the response was YES. [2024-06-27 18:45:53,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28161 conditions, 7201 events. 4949/7201 cut-off events. For 26019/26033 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 38562 event pairs, 1321 based on Foata normal form. 14/7207 useless extension candidates. Maximal degree in co-relation 28123. Up to 6734 conditions per place. [2024-06-27 18:45:53,464 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 136 selfloop transitions, 27 changer transitions 0/169 dead transitions. [2024-06-27 18:45:53,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 169 transitions, 1490 flow [2024-06-27 18:45:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:45:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:45:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:45:53,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 18:45:53,465 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 853 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:45:53,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 169 transitions, 1490 flow [2024-06-27 18:45:53,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 169 transitions, 1406 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 18:45:53,497 INFO L231 Difference]: Finished difference. Result has 94 places, 125 transitions, 1046 flow [2024-06-27 18:45:53,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1046, PETRI_PLACES=94, PETRI_TRANSITIONS=125} [2024-06-27 18:45:53,498 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 43 predicate places. [2024-06-27 18:45:53,498 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 125 transitions, 1046 flow [2024-06-27 18:45:53,498 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) [2024-06-27 18:45:53,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:53,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:53,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:45:53,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:53,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:53,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1804561491, now seen corresponding path program 1 times [2024-06-27 18:45:53,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:53,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909791673] [2024-06-27 18:45:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:53,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:56,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:56,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909791673] [2024-06-27 18:45:56,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909791673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:56,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:56,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:45:56,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516025259] [2024-06-27 18:45:56,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:56,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:45:56,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:45:56,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:45:56,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:45:56,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 125 transitions, 1046 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) [2024-06-27 18:45:56,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:56,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:45:56,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:57,700 INFO L124 PetriNetUnfolderBase]: 4941/7481 cut-off events. [2024-06-27 18:45:57,700 INFO L125 PetriNetUnfolderBase]: For 28968/28971 co-relation queries the response was YES. [2024-06-27 18:45:57,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29915 conditions, 7481 events. 4941/7481 cut-off events. For 28968/28971 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 42157 event pairs, 1584 based on Foata normal form. 6/7483 useless extension candidates. Maximal degree in co-relation 29874. Up to 6929 conditions per place. [2024-06-27 18:45:57,748 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 142 selfloop transitions, 14 changer transitions 0/162 dead transitions. [2024-06-27 18:45:57,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 162 transitions, 1469 flow [2024-06-27 18:45:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:45:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:45:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 18:45:57,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:45:57,751 INFO L175 Difference]: Start difference. First operand has 94 places, 125 transitions, 1046 flow. Second operand 6 states and 141 transitions. [2024-06-27 18:45:57,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 162 transitions, 1469 flow [2024-06-27 18:45:57,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 162 transitions, 1449 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 18:45:57,796 INFO L231 Difference]: Finished difference. Result has 99 places, 128 transitions, 1100 flow [2024-06-27 18:45:57,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1100, PETRI_PLACES=99, PETRI_TRANSITIONS=128} [2024-06-27 18:45:57,798 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2024-06-27 18:45:57,799 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 128 transitions, 1100 flow [2024-06-27 18:45:57,799 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) [2024-06-27 18:45:57,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:57,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:57,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:45:57,799 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:57,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2028685132, now seen corresponding path program 1 times [2024-06-27 18:45:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:57,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364224586] [2024-06-27 18:45:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:57,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:00,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364224586] [2024-06-27 18:46:00,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364224586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:00,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:00,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:00,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85700835] [2024-06-27 18:46:00,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:00,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:00,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:00,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:00,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:00,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 128 transitions, 1100 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) [2024-06-27 18:46:00,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:00,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:00,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:03,105 INFO L124 PetriNetUnfolderBase]: 5637/8243 cut-off events. [2024-06-27 18:46:03,105 INFO L125 PetriNetUnfolderBase]: For 37477/37480 co-relation queries the response was YES. [2024-06-27 18:46:03,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34096 conditions, 8243 events. 5637/8243 cut-off events. For 37477/37480 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 45621 event pairs, 1334 based on Foata normal form. 12/8251 useless extension candidates. Maximal degree in co-relation 34052. Up to 6168 conditions per place. [2024-06-27 18:46:03,154 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 167 selfloop transitions, 80 changer transitions 0/253 dead transitions. [2024-06-27 18:46:03,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 253 transitions, 2147 flow [2024-06-27 18:46:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:46:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:46:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 296 transitions. [2024-06-27 18:46:03,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725338491295938 [2024-06-27 18:46:03,157 INFO L175 Difference]: Start difference. First operand has 99 places, 128 transitions, 1100 flow. Second operand 11 states and 296 transitions. [2024-06-27 18:46:03,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 253 transitions, 2147 flow [2024-06-27 18:46:03,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 253 transitions, 2099 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:46:03,210 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1419 flow [2024-06-27 18:46:03,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1419, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2024-06-27 18:46:03,211 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-27 18:46:03,211 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1419 flow [2024-06-27 18:46:03,211 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) [2024-06-27 18:46:03,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:03,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:03,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:46:03,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:03,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:03,212 INFO L85 PathProgramCache]: Analyzing trace with hash 506481756, now seen corresponding path program 2 times [2024-06-27 18:46:03,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:03,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502772883] [2024-06-27 18:46:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:03,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502772883] [2024-06-27 18:46:06,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502772883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:06,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:06,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:06,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271480094] [2024-06-27 18:46:06,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:06,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:06,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:06,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:06,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1419 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) [2024-06-27 18:46:06,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:06,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:06,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:08,621 INFO L124 PetriNetUnfolderBase]: 6153/9015 cut-off events. [2024-06-27 18:46:08,622 INFO L125 PetriNetUnfolderBase]: For 56635/56638 co-relation queries the response was YES. [2024-06-27 18:46:08,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42194 conditions, 9015 events. 6153/9015 cut-off events. For 56635/56638 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 50485 event pairs, 1496 based on Foata normal form. 12/9023 useless extension candidates. Maximal degree in co-relation 42147. Up to 7384 conditions per place. [2024-06-27 18:46:08,685 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 182 selfloop transitions, 69 changer transitions 0/257 dead transitions. [2024-06-27 18:46:08,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 257 transitions, 2502 flow [2024-06-27 18:46:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:46:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:46:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-27 18:46:08,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5765957446808511 [2024-06-27 18:46:08,687 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1419 flow. Second operand 10 states and 271 transitions. [2024-06-27 18:46:08,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 257 transitions, 2502 flow [2024-06-27 18:46:08,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 257 transitions, 2313 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 18:46:08,794 INFO L231 Difference]: Finished difference. Result has 113 places, 161 transitions, 1616 flow [2024-06-27 18:46:08,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1616, PETRI_PLACES=113, PETRI_TRANSITIONS=161} [2024-06-27 18:46:08,794 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 62 predicate places. [2024-06-27 18:46:08,795 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 161 transitions, 1616 flow [2024-06-27 18:46:08,795 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) [2024-06-27 18:46:08,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:08,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:08,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:46:08,795 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:08,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash -226912888, now seen corresponding path program 3 times [2024-06-27 18:46:08,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:08,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482405739] [2024-06-27 18:46:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:08,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:11,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482405739] [2024-06-27 18:46:11,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482405739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:11,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:11,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15637514] [2024-06-27 18:46:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:11,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:11,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:11,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:11,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 161 transitions, 1616 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) [2024-06-27 18:46:11,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:11,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:11,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:14,723 INFO L124 PetriNetUnfolderBase]: 6237/9175 cut-off events. [2024-06-27 18:46:14,723 INFO L125 PetriNetUnfolderBase]: For 63322/63325 co-relation queries the response was YES. [2024-06-27 18:46:14,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44349 conditions, 9175 events. 6237/9175 cut-off events. For 63322/63325 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 51955 event pairs, 1459 based on Foata normal form. 12/9183 useless extension candidates. Maximal degree in co-relation 44299. Up to 7449 conditions per place. [2024-06-27 18:46:14,792 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 198 selfloop transitions, 76 changer transitions 0/280 dead transitions. [2024-06-27 18:46:14,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 280 transitions, 2623 flow [2024-06-27 18:46:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:46:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:46:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2024-06-27 18:46:14,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-27 18:46:14,795 INFO L175 Difference]: Start difference. First operand has 113 places, 161 transitions, 1616 flow. Second operand 12 states and 320 transitions. [2024-06-27 18:46:14,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 280 transitions, 2623 flow [2024-06-27 18:46:14,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 280 transitions, 2500 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 18:46:14,917 INFO L231 Difference]: Finished difference. Result has 119 places, 166 transitions, 1725 flow [2024-06-27 18:46:14,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1725, PETRI_PLACES=119, PETRI_TRANSITIONS=166} [2024-06-27 18:46:14,918 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 68 predicate places. [2024-06-27 18:46:14,918 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 166 transitions, 1725 flow [2024-06-27 18:46:14,918 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) [2024-06-27 18:46:14,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:14,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:14,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:46:14,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:14,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:14,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1520925372, now seen corresponding path program 4 times [2024-06-27 18:46:14,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:14,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334858436] [2024-06-27 18:46:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:14,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:17,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:17,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334858436] [2024-06-27 18:46:17,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334858436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:17,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:17,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809601876] [2024-06-27 18:46:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:17,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:17,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:17,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 166 transitions, 1725 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) [2024-06-27 18:46:17,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:17,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:17,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:20,608 INFO L124 PetriNetUnfolderBase]: 6849/10067 cut-off events. [2024-06-27 18:46:20,609 INFO L125 PetriNetUnfolderBase]: For 74089/74092 co-relation queries the response was YES. [2024-06-27 18:46:20,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50384 conditions, 10067 events. 6849/10067 cut-off events. For 74089/74092 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 57869 event pairs, 1417 based on Foata normal form. 12/10075 useless extension candidates. Maximal degree in co-relation 50332. Up to 7642 conditions per place. [2024-06-27 18:46:20,675 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 181 selfloop transitions, 92 changer transitions 0/279 dead transitions. [2024-06-27 18:46:20,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 279 transitions, 2973 flow [2024-06-27 18:46:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:46:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:46:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-27 18:46:20,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5839243498817966 [2024-06-27 18:46:20,678 INFO L175 Difference]: Start difference. First operand has 119 places, 166 transitions, 1725 flow. Second operand 9 states and 247 transitions. [2024-06-27 18:46:20,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 279 transitions, 2973 flow [2024-06-27 18:46:20,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 279 transitions, 2735 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-27 18:46:20,814 INFO L231 Difference]: Finished difference. Result has 120 places, 192 transitions, 2127 flow [2024-06-27 18:46:20,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2127, PETRI_PLACES=120, PETRI_TRANSITIONS=192} [2024-06-27 18:46:20,815 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 69 predicate places. [2024-06-27 18:46:20,816 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 192 transitions, 2127 flow [2024-06-27 18:46:20,816 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) [2024-06-27 18:46:20,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:20,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:20,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:46:20,817 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:20,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash -114457782, now seen corresponding path program 5 times [2024-06-27 18:46:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:20,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200286399] [2024-06-27 18:46:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:23,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:23,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200286399] [2024-06-27 18:46:23,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200286399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:23,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:23,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333155851] [2024-06-27 18:46:23,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:23,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:23,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:23,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:23,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:23,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 192 transitions, 2127 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) [2024-06-27 18:46:23,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:23,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:23,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:26,106 INFO L124 PetriNetUnfolderBase]: 6933/10199 cut-off events. [2024-06-27 18:46:26,107 INFO L125 PetriNetUnfolderBase]: For 83117/83120 co-relation queries the response was YES. [2024-06-27 18:46:26,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53051 conditions, 10199 events. 6933/10199 cut-off events. For 83117/83120 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 58837 event pairs, 1346 based on Foata normal form. 12/10207 useless extension candidates. Maximal degree in co-relation 52996. Up to 7707 conditions per place. [2024-06-27 18:46:26,187 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 171 selfloop transitions, 100 changer transitions 0/277 dead transitions. [2024-06-27 18:46:26,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 277 transitions, 3026 flow [2024-06-27 18:46:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:46:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:46:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 18:46:26,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650118203309693 [2024-06-27 18:46:26,189 INFO L175 Difference]: Start difference. First operand has 120 places, 192 transitions, 2127 flow. Second operand 9 states and 239 transitions. [2024-06-27 18:46:26,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 277 transitions, 3026 flow [2024-06-27 18:46:26,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 277 transitions, 2867 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:26,440 INFO L231 Difference]: Finished difference. Result has 125 places, 198 transitions, 2314 flow [2024-06-27 18:46:26,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2314, PETRI_PLACES=125, PETRI_TRANSITIONS=198} [2024-06-27 18:46:26,446 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 74 predicate places. [2024-06-27 18:46:26,447 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 198 transitions, 2314 flow [2024-06-27 18:46:26,447 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) [2024-06-27 18:46:26,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:26,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:26,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:46:26,447 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:26,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -107106132, now seen corresponding path program 6 times [2024-06-27 18:46:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:26,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250513348] [2024-06-27 18:46:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:28,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250513348] [2024-06-27 18:46:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250513348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:28,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:28,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:28,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694499113] [2024-06-27 18:46:28,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:28,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:28,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:28,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:28,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 198 transitions, 2314 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) [2024-06-27 18:46:28,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:28,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:28,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:31,801 INFO L124 PetriNetUnfolderBase]: 6943/10261 cut-off events. [2024-06-27 18:46:31,801 INFO L125 PetriNetUnfolderBase]: For 89445/89482 co-relation queries the response was YES. [2024-06-27 18:46:31,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54365 conditions, 10261 events. 6943/10261 cut-off events. For 89445/89482 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 59307 event pairs, 1600 based on Foata normal form. 31/10284 useless extension candidates. Maximal degree in co-relation 54308. Up to 9088 conditions per place. [2024-06-27 18:46:31,877 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 247 selfloop transitions, 55 changer transitions 0/308 dead transitions. [2024-06-27 18:46:31,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 308 transitions, 3604 flow [2024-06-27 18:46:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:46:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:46:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:46:31,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342789598108747 [2024-06-27 18:46:31,879 INFO L175 Difference]: Start difference. First operand has 125 places, 198 transitions, 2314 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:46:31,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 308 transitions, 3604 flow [2024-06-27 18:46:32,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 308 transitions, 3402 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:32,134 INFO L231 Difference]: Finished difference. Result has 131 places, 221 transitions, 2620 flow [2024-06-27 18:46:32,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2620, PETRI_PLACES=131, PETRI_TRANSITIONS=221} [2024-06-27 18:46:32,135 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 80 predicate places. [2024-06-27 18:46:32,135 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 221 transitions, 2620 flow [2024-06-27 18:46:32,135 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) [2024-06-27 18:46:32,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:32,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:32,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:46:32,136 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:32,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash -54509966, now seen corresponding path program 1 times [2024-06-27 18:46:32,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:32,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381242044] [2024-06-27 18:46:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:32,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:34,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:34,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381242044] [2024-06-27 18:46:34,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381242044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:34,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:34,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:34,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106192327] [2024-06-27 18:46:34,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:34,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:34,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:34,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:34,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 221 transitions, 2620 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) [2024-06-27 18:46:34,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:34,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:34,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:37,962 INFO L124 PetriNetUnfolderBase]: 9075/13400 cut-off events. [2024-06-27 18:46:37,962 INFO L125 PetriNetUnfolderBase]: For 131797/131810 co-relation queries the response was YES. [2024-06-27 18:46:38,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73804 conditions, 13400 events. 9075/13400 cut-off events. For 131797/131810 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 80928 event pairs, 1878 based on Foata normal form. 28/13424 useless extension candidates. Maximal degree in co-relation 73744. Up to 10264 conditions per place. [2024-06-27 18:46:38,066 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 296 selfloop transitions, 147 changer transitions 0/449 dead transitions. [2024-06-27 18:46:38,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 449 transitions, 5733 flow [2024-06-27 18:46:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:46:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:46:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-06-27 18:46:38,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686653771760155 [2024-06-27 18:46:38,068 INFO L175 Difference]: Start difference. First operand has 131 places, 221 transitions, 2620 flow. Second operand 11 states and 294 transitions. [2024-06-27 18:46:38,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 449 transitions, 5733 flow [2024-06-27 18:46:38,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 449 transitions, 5650 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 18:46:38,518 INFO L231 Difference]: Finished difference. Result has 143 places, 325 transitions, 4536 flow [2024-06-27 18:46:38,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4536, PETRI_PLACES=143, PETRI_TRANSITIONS=325} [2024-06-27 18:46:38,519 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-27 18:46:38,519 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 325 transitions, 4536 flow [2024-06-27 18:46:38,519 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) [2024-06-27 18:46:38,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:38,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:38,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:46:38,520 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:38,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash -647246260, now seen corresponding path program 2 times [2024-06-27 18:46:38,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:38,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905625314] [2024-06-27 18:46:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:38,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905625314] [2024-06-27 18:46:41,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905625314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:41,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:41,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:41,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789034482] [2024-06-27 18:46:41,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:41,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:41,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:41,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:41,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:41,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 325 transitions, 4536 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) [2024-06-27 18:46:41,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:41,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:41,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:44,683 INFO L124 PetriNetUnfolderBase]: 9163/13520 cut-off events. [2024-06-27 18:46:44,683 INFO L125 PetriNetUnfolderBase]: For 160134/160147 co-relation queries the response was YES. [2024-06-27 18:46:44,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80591 conditions, 13520 events. 9163/13520 cut-off events. For 160134/160147 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 82103 event pairs, 1431 based on Foata normal form. 18/13534 useless extension candidates. Maximal degree in co-relation 80524. Up to 11213 conditions per place. [2024-06-27 18:46:44,803 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 291 selfloop transitions, 111 changer transitions 0/408 dead transitions. [2024-06-27 18:46:44,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 408 transitions, 5950 flow [2024-06-27 18:46:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:46:44,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 18:46:44,805 INFO L175 Difference]: Start difference. First operand has 143 places, 325 transitions, 4536 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:46:44,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 408 transitions, 5950 flow [2024-06-27 18:46:45,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 408 transitions, 5817 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-27 18:46:45,440 INFO L231 Difference]: Finished difference. Result has 150 places, 331 transitions, 4821 flow [2024-06-27 18:46:45,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4447, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4821, PETRI_PLACES=150, PETRI_TRANSITIONS=331} [2024-06-27 18:46:45,441 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 99 predicate places. [2024-06-27 18:46:45,441 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 331 transitions, 4821 flow [2024-06-27 18:46:45,442 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) [2024-06-27 18:46:45,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:45,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:46:45,443 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:45,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1440168180, now seen corresponding path program 3 times [2024-06-27 18:46:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:45,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684944889] [2024-06-27 18:46:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:45,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:48,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:48,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684944889] [2024-06-27 18:46:48,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684944889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:48,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:48,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:48,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108286615] [2024-06-27 18:46:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:48,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:48,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:48,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 331 transitions, 4821 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) [2024-06-27 18:46:48,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:48,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:48,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:51,707 INFO L124 PetriNetUnfolderBase]: 9339/13735 cut-off events. [2024-06-27 18:46:51,707 INFO L125 PetriNetUnfolderBase]: For 168670/168683 co-relation queries the response was YES. [2024-06-27 18:46:51,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82795 conditions, 13735 events. 9339/13735 cut-off events. For 168670/168683 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 82958 event pairs, 1927 based on Foata normal form. 24/13755 useless extension candidates. Maximal degree in co-relation 82725. Up to 12083 conditions per place. [2024-06-27 18:46:51,837 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 296 selfloop transitions, 107 changer transitions 0/409 dead transitions. [2024-06-27 18:46:51,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 409 transitions, 6065 flow [2024-06-27 18:46:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:46:51,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-27 18:46:51,839 INFO L175 Difference]: Start difference. First operand has 150 places, 331 transitions, 4821 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:46:51,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 409 transitions, 6065 flow [2024-06-27 18:46:52,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 409 transitions, 5900 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 18:46:52,683 INFO L231 Difference]: Finished difference. Result has 154 places, 334 transitions, 4946 flow [2024-06-27 18:46:52,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4666, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4946, PETRI_PLACES=154, PETRI_TRANSITIONS=334} [2024-06-27 18:46:52,684 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-06-27 18:46:52,684 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 334 transitions, 4946 flow [2024-06-27 18:46:52,684 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) [2024-06-27 18:46:52,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:52,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:52,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:46:52,685 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:52,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1539736264, now seen corresponding path program 4 times [2024-06-27 18:46:52,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:52,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188631756] [2024-06-27 18:46:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:52,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:55,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188631756] [2024-06-27 18:46:55,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188631756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:55,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:55,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917461454] [2024-06-27 18:46:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:55,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:55,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:55,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:55,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 334 transitions, 4946 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) [2024-06-27 18:46:55,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:55,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:55,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:59,360 INFO L124 PetriNetUnfolderBase]: 9506/13948 cut-off events. [2024-06-27 18:46:59,360 INFO L125 PetriNetUnfolderBase]: For 174069/174078 co-relation queries the response was YES. [2024-06-27 18:46:59,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85085 conditions, 13948 events. 9506/13948 cut-off events. For 174069/174078 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 84085 event pairs, 1952 based on Foata normal form. 20/13964 useless extension candidates. Maximal degree in co-relation 85013. Up to 12684 conditions per place. [2024-06-27 18:46:59,495 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 333 selfloop transitions, 73 changer transitions 0/412 dead transitions. [2024-06-27 18:46:59,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 412 transitions, 6203 flow [2024-06-27 18:46:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 18:46:59,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-27 18:46:59,497 INFO L175 Difference]: Start difference. First operand has 154 places, 334 transitions, 4946 flow. Second operand 8 states and 201 transitions. [2024-06-27 18:46:59,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 412 transitions, 6203 flow [2024-06-27 18:47:00,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 412 transitions, 5981 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:00,134 INFO L231 Difference]: Finished difference. Result has 156 places, 337 transitions, 4951 flow [2024-06-27 18:47:00,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4724, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4951, PETRI_PLACES=156, PETRI_TRANSITIONS=337} [2024-06-27 18:47:00,135 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 105 predicate places. [2024-06-27 18:47:00,135 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 337 transitions, 4951 flow [2024-06-27 18:47:00,136 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) [2024-06-27 18:47:00,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:00,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:00,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:47:00,136 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:00,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:00,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1478752784, now seen corresponding path program 1 times [2024-06-27 18:47:00,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:00,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036836337] [2024-06-27 18:47:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:00,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:03,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:03,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036836337] [2024-06-27 18:47:03,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036836337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:03,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:03,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:03,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049170159] [2024-06-27 18:47:03,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:03,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:03,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:03,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 337 transitions, 4951 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:03,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:03,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:03,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:07,192 INFO L124 PetriNetUnfolderBase]: 9822/14319 cut-off events. [2024-06-27 18:47:07,193 INFO L125 PetriNetUnfolderBase]: For 186144/186153 co-relation queries the response was YES. [2024-06-27 18:47:07,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86991 conditions, 14319 events. 9822/14319 cut-off events. For 186144/186153 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 85706 event pairs, 1795 based on Foata normal form. 26/14341 useless extension candidates. Maximal degree in co-relation 86918. Up to 12256 conditions per place. [2024-06-27 18:47:07,369 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 340 selfloop transitions, 91 changer transitions 0/437 dead transitions. [2024-06-27 18:47:07,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 437 transitions, 6317 flow [2024-06-27 18:47:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:47:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:47:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:47:07,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617021276595745 [2024-06-27 18:47:07,372 INFO L175 Difference]: Start difference. First operand has 156 places, 337 transitions, 4951 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:47:07,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 437 transitions, 6317 flow [2024-06-27 18:47:08,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 437 transitions, 6166 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:08,034 INFO L231 Difference]: Finished difference. Result has 160 places, 341 transitions, 5085 flow [2024-06-27 18:47:08,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4800, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5085, PETRI_PLACES=160, PETRI_TRANSITIONS=341} [2024-06-27 18:47:08,035 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-27 18:47:08,035 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 341 transitions, 5085 flow [2024-06-27 18:47:08,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:08,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:08,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:08,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:47:08,036 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:08,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash 746600340, now seen corresponding path program 5 times [2024-06-27 18:47:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488529751] [2024-06-27 18:47:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:10,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488529751] [2024-06-27 18:47:10,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488529751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:10,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:10,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:47:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595494667] [2024-06-27 18:47:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:10,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:47:10,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:47:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:47:10,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:10,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 341 transitions, 5085 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) [2024-06-27 18:47:10,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:10,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:10,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:14,351 INFO L124 PetriNetUnfolderBase]: 9799/14413 cut-off events. [2024-06-27 18:47:14,352 INFO L125 PetriNetUnfolderBase]: For 192395/192408 co-relation queries the response was YES. [2024-06-27 18:47:14,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88522 conditions, 14413 events. 9799/14413 cut-off events. For 192395/192408 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 87600 event pairs, 1525 based on Foata normal form. 22/14431 useless extension candidates. Maximal degree in co-relation 88448. Up to 12447 conditions per place. [2024-06-27 18:47:14,510 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 294 selfloop transitions, 104 changer transitions 0/404 dead transitions. [2024-06-27 18:47:14,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 404 transitions, 6193 flow [2024-06-27 18:47:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:47:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:47:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:47:14,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:47:14,512 INFO L175 Difference]: Start difference. First operand has 160 places, 341 transitions, 5085 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:47:14,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 404 transitions, 6193 flow [2024-06-27 18:47:15,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 404 transitions, 5964 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 18:47:15,433 INFO L231 Difference]: Finished difference. Result has 160 places, 341 transitions, 5101 flow [2024-06-27 18:47:15,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5101, PETRI_PLACES=160, PETRI_TRANSITIONS=341} [2024-06-27 18:47:15,434 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-27 18:47:15,434 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 341 transitions, 5101 flow [2024-06-27 18:47:15,434 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) [2024-06-27 18:47:15,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:15,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:15,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:47:15,435 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:15,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash 746785038, now seen corresponding path program 2 times [2024-06-27 18:47:15,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:15,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986471966] [2024-06-27 18:47:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:18,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:18,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986471966] [2024-06-27 18:47:18,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986471966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:18,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:18,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:18,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651767276] [2024-06-27 18:47:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:18,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:18,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:18,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:18,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 341 transitions, 5101 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:18,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:18,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:18,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:22,365 INFO L124 PetriNetUnfolderBase]: 10115/14743 cut-off events. [2024-06-27 18:47:22,365 INFO L125 PetriNetUnfolderBase]: For 205507/205520 co-relation queries the response was YES. [2024-06-27 18:47:22,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90291 conditions, 14743 events. 10115/14743 cut-off events. For 205507/205520 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 88411 event pairs, 1838 based on Foata normal form. 30/14769 useless extension candidates. Maximal degree in co-relation 90216. Up to 12363 conditions per place. [2024-06-27 18:47:22,497 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 312 selfloop transitions, 96 changer transitions 0/414 dead transitions. [2024-06-27 18:47:22,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 414 transitions, 6285 flow [2024-06-27 18:47:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:47:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:47:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:47:22,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 18:47:22,499 INFO L175 Difference]: Start difference. First operand has 160 places, 341 transitions, 5101 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:47:22,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 414 transitions, 6285 flow [2024-06-27 18:47:23,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 414 transitions, 6059 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:23,106 INFO L231 Difference]: Finished difference. Result has 162 places, 345 transitions, 5187 flow [2024-06-27 18:47:23,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5187, PETRI_PLACES=162, PETRI_TRANSITIONS=345} [2024-06-27 18:47:23,107 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 111 predicate places. [2024-06-27 18:47:23,108 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 345 transitions, 5187 flow [2024-06-27 18:47:23,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:23,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:23,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:23,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:47:23,109 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:23,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash 974686188, now seen corresponding path program 3 times [2024-06-27 18:47:23,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:23,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469607932] [2024-06-27 18:47:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:26,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:26,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469607932] [2024-06-27 18:47:26,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469607932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:26,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:26,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:26,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007799844] [2024-06-27 18:47:26,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:26,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:26,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:26,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:26,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:26,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 345 transitions, 5187 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:26,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:26,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:26,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:30,208 INFO L124 PetriNetUnfolderBase]: 10165/15038 cut-off events. [2024-06-27 18:47:30,208 INFO L125 PetriNetUnfolderBase]: For 208070/208125 co-relation queries the response was YES. [2024-06-27 18:47:30,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92598 conditions, 15038 events. 10165/15038 cut-off events. For 208070/208125 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 92124 event pairs, 2000 based on Foata normal form. 43/15069 useless extension candidates. Maximal degree in co-relation 92522. Up to 13911 conditions per place. [2024-06-27 18:47:30,356 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 366 selfloop transitions, 34 changer transitions 0/406 dead transitions. [2024-06-27 18:47:30,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 406 transitions, 6326 flow [2024-06-27 18:47:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:47:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:47:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:47:30,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-27 18:47:30,358 INFO L175 Difference]: Start difference. First operand has 162 places, 345 transitions, 5187 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:47:30,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 406 transitions, 6326 flow [2024-06-27 18:47:31,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 406 transitions, 6056 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:31,064 INFO L231 Difference]: Finished difference. Result has 163 places, 347 transitions, 5048 flow [2024-06-27 18:47:31,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4935, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5048, PETRI_PLACES=163, PETRI_TRANSITIONS=347} [2024-06-27 18:47:31,064 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 112 predicate places. [2024-06-27 18:47:31,064 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 347 transitions, 5048 flow [2024-06-27 18:47:31,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:31,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:31,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:31,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:47:31,065 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:31,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:31,065 INFO L85 PathProgramCache]: Analyzing trace with hash 983257068, now seen corresponding path program 4 times [2024-06-27 18:47:31,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:31,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934860749] [2024-06-27 18:47:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:31,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:34,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:34,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934860749] [2024-06-27 18:47:34,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934860749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:34,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:34,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466425966] [2024-06-27 18:47:34,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:34,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:34,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:34,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:34,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 347 transitions, 5048 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:34,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:34,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:34,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:37,903 INFO L124 PetriNetUnfolderBase]: 10165/14990 cut-off events. [2024-06-27 18:47:37,904 INFO L125 PetriNetUnfolderBase]: For 195383/195438 co-relation queries the response was YES. [2024-06-27 18:47:37,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90418 conditions, 14990 events. 10165/14990 cut-off events. For 195383/195438 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 91336 event pairs, 1886 based on Foata normal form. 43/15021 useless extension candidates. Maximal degree in co-relation 90341. Up to 13709 conditions per place. [2024-06-27 18:47:38,049 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 367 selfloop transitions, 43 changer transitions 0/416 dead transitions. [2024-06-27 18:47:38,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 416 transitions, 6307 flow [2024-06-27 18:47:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:47:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:47:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:47:38,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-27 18:47:38,051 INFO L175 Difference]: Start difference. First operand has 163 places, 347 transitions, 5048 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:47:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 416 transitions, 6307 flow [2024-06-27 18:47:38,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 416 transitions, 6251 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:47:38,612 INFO L231 Difference]: Finished difference. Result has 167 places, 354 transitions, 5220 flow [2024-06-27 18:47:38,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5220, PETRI_PLACES=167, PETRI_TRANSITIONS=354} [2024-06-27 18:47:38,612 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2024-06-27 18:47:38,613 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 354 transitions, 5220 flow [2024-06-27 18:47:38,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:38,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:38,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:38,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:47:38,613 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:38,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash -35547285, now seen corresponding path program 1 times [2024-06-27 18:47:38,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:38,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109289540] [2024-06-27 18:47:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:38,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:40,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:40,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109289540] [2024-06-27 18:47:40,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109289540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:40,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:40,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:47:40,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823852766] [2024-06-27 18:47:40,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:40,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:47:40,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:40,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:47:40,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:47:40,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:40,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 354 transitions, 5220 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) [2024-06-27 18:47:40,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:40,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:40,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:44,089 INFO L124 PetriNetUnfolderBase]: 9891/14921 cut-off events. [2024-06-27 18:47:44,089 INFO L125 PetriNetUnfolderBase]: For 217613/217984 co-relation queries the response was YES. [2024-06-27 18:47:44,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90461 conditions, 14921 events. 9891/14921 cut-off events. For 217613/217984 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 94073 event pairs, 2639 based on Foata normal form. 285/15085 useless extension candidates. Maximal degree in co-relation 90382. Up to 13536 conditions per place. [2024-06-27 18:47:44,277 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 354 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2024-06-27 18:47:44,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 396 transitions, 6278 flow [2024-06-27 18:47:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:47:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:47:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 18:47:44,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 18:47:44,279 INFO L175 Difference]: Start difference. First operand has 167 places, 354 transitions, 5220 flow. Second operand 6 states and 148 transitions. [2024-06-27 18:47:44,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 396 transitions, 6278 flow [2024-06-27 18:47:45,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 396 transitions, 6197 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 18:47:45,197 INFO L231 Difference]: Finished difference. Result has 171 places, 364 transitions, 5393 flow [2024-06-27 18:47:45,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5139, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5393, PETRI_PLACES=171, PETRI_TRANSITIONS=364} [2024-06-27 18:47:45,198 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 18:47:45,198 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 364 transitions, 5393 flow [2024-06-27 18:47:45,198 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) [2024-06-27 18:47:45,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:45,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:45,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:47:45,198 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:45,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:45,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2029955775, now seen corresponding path program 1 times [2024-06-27 18:47:45,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:45,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740221320] [2024-06-27 18:47:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:45,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:48,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:48,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740221320] [2024-06-27 18:47:48,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740221320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:48,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:48,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:48,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472406173] [2024-06-27 18:47:48,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:48,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:48,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:48,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:48,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:48,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 364 transitions, 5393 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:48,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:48,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:48,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:53,925 INFO L124 PetriNetUnfolderBase]: 13937/20714 cut-off events. [2024-06-27 18:47:53,926 INFO L125 PetriNetUnfolderBase]: For 350030/350043 co-relation queries the response was YES. [2024-06-27 18:47:54,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124348 conditions, 20714 events. 13937/20714 cut-off events. For 350030/350043 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 134308 event pairs, 1894 based on Foata normal form. 76/20786 useless extension candidates. Maximal degree in co-relation 124266. Up to 7746 conditions per place. [2024-06-27 18:47:54,159 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 273 selfloop transitions, 236 changer transitions 0/515 dead transitions. [2024-06-27 18:47:54,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 515 transitions, 7589 flow [2024-06-27 18:47:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:47:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:47:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 317 transitions. [2024-06-27 18:47:54,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6131528046421664 [2024-06-27 18:47:54,175 INFO L175 Difference]: Start difference. First operand has 171 places, 364 transitions, 5393 flow. Second operand 11 states and 317 transitions. [2024-06-27 18:47:54,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 515 transitions, 7589 flow [2024-06-27 18:47:55,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 515 transitions, 7484 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-27 18:47:55,413 INFO L231 Difference]: Finished difference. Result has 182 places, 376 transitions, 6185 flow [2024-06-27 18:47:55,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6185, PETRI_PLACES=182, PETRI_TRANSITIONS=376} [2024-06-27 18:47:55,416 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 131 predicate places. [2024-06-27 18:47:55,416 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 376 transitions, 6185 flow [2024-06-27 18:47:55,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:55,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:55,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:47:55,416 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:55,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2031833445, now seen corresponding path program 2 times [2024-06-27 18:47:55,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:55,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495269786] [2024-06-27 18:47:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:55,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:59,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:59,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495269786] [2024-06-27 18:47:59,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495269786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:59,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:59,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:59,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985118258] [2024-06-27 18:47:59,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:59,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:59,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:59,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:59,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:59,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 376 transitions, 6185 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:59,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:59,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:59,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:05,819 INFO L124 PetriNetUnfolderBase]: 15077/22427 cut-off events. [2024-06-27 18:48:05,819 INFO L125 PetriNetUnfolderBase]: For 434556/434569 co-relation queries the response was YES. [2024-06-27 18:48:05,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139507 conditions, 22427 events. 15077/22427 cut-off events. For 434556/434569 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 147667 event pairs, 3508 based on Foata normal form. 86/22509 useless extension candidates. Maximal degree in co-relation 139421. Up to 16112 conditions per place. [2024-06-27 18:48:06,068 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 270 selfloop transitions, 227 changer transitions 0/503 dead transitions. [2024-06-27 18:48:06,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 503 transitions, 7896 flow [2024-06-27 18:48:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:48:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:48:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 326 transitions. [2024-06-27 18:48:06,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780141843971631 [2024-06-27 18:48:06,071 INFO L175 Difference]: Start difference. First operand has 182 places, 376 transitions, 6185 flow. Second operand 12 states and 326 transitions. [2024-06-27 18:48:06,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 503 transitions, 7896 flow [2024-06-27 18:48:07,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 503 transitions, 7534 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-27 18:48:07,939 INFO L231 Difference]: Finished difference. Result has 189 places, 379 transitions, 6389 flow [2024-06-27 18:48:07,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5833, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6389, PETRI_PLACES=189, PETRI_TRANSITIONS=379} [2024-06-27 18:48:07,940 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 138 predicate places. [2024-06-27 18:48:07,941 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 379 transitions, 6389 flow [2024-06-27 18:48:07,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:07,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:07,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:07,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:48:07,941 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:07,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1608851005, now seen corresponding path program 3 times [2024-06-27 18:48:07,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:07,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277196252] [2024-06-27 18:48:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:11,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:11,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277196252] [2024-06-27 18:48:11,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277196252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:11,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:48:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616335153] [2024-06-27 18:48:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:48:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:48:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:48:11,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:11,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 379 transitions, 6389 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:11,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:11,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:11,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:18,758 INFO L124 PetriNetUnfolderBase]: 17225/25682 cut-off events. [2024-06-27 18:48:18,758 INFO L125 PetriNetUnfolderBase]: For 474881/474894 co-relation queries the response was YES. [2024-06-27 18:48:19,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155133 conditions, 25682 events. 17225/25682 cut-off events. For 474881/474894 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 173367 event pairs, 4028 based on Foata normal form. 76/25754 useless extension candidates. Maximal degree in co-relation 155045. Up to 15787 conditions per place. [2024-06-27 18:48:19,191 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 286 selfloop transitions, 233 changer transitions 0/525 dead transitions. [2024-06-27 18:48:19,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 525 transitions, 8407 flow [2024-06-27 18:48:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:48:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:48:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 337 transitions. [2024-06-27 18:48:19,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975177304964538 [2024-06-27 18:48:19,194 INFO L175 Difference]: Start difference. First operand has 189 places, 379 transitions, 6389 flow. Second operand 12 states and 337 transitions. [2024-06-27 18:48:19,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 525 transitions, 8407 flow [2024-06-27 18:48:21,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 525 transitions, 7897 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-27 18:48:21,228 INFO L231 Difference]: Finished difference. Result has 192 places, 389 transitions, 6631 flow [2024-06-27 18:48:21,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5879, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6631, PETRI_PLACES=192, PETRI_TRANSITIONS=389} [2024-06-27 18:48:21,228 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 141 predicate places. [2024-06-27 18:48:21,229 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 389 transitions, 6631 flow [2024-06-27 18:48:21,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:21,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:21,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:21,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:48:21,229 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:21,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1403090759, now seen corresponding path program 4 times [2024-06-27 18:48:21,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:21,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587265102] [2024-06-27 18:48:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:24,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:24,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587265102] [2024-06-27 18:48:24,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587265102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:24,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:24,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:48:24,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998319878] [2024-06-27 18:48:24,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:24,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:48:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:48:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:48:24,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:24,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 389 transitions, 6631 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:24,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:24,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:24,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:32,572 INFO L124 PetriNetUnfolderBase]: 18365/27541 cut-off events. [2024-06-27 18:48:32,572 INFO L125 PetriNetUnfolderBase]: For 524148/524157 co-relation queries the response was YES. [2024-06-27 18:48:32,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164266 conditions, 27541 events. 18365/27541 cut-off events. For 524148/524157 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 189233 event pairs, 5170 based on Foata normal form. 82/27619 useless extension candidates. Maximal degree in co-relation 164176. Up to 22767 conditions per place. [2024-06-27 18:48:33,041 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 377 selfloop transitions, 149 changer transitions 0/532 dead transitions. [2024-06-27 18:48:33,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 532 transitions, 8496 flow [2024-06-27 18:48:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:48:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:48:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 351 transitions. [2024-06-27 18:48:33,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-06-27 18:48:33,044 INFO L175 Difference]: Start difference. First operand has 192 places, 389 transitions, 6631 flow. Second operand 13 states and 351 transitions. [2024-06-27 18:48:33,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 532 transitions, 8496 flow [2024-06-27 18:48:35,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 532 transitions, 8096 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 18:48:35,190 INFO L231 Difference]: Finished difference. Result has 197 places, 392 transitions, 6654 flow [2024-06-27 18:48:35,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6237, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6654, PETRI_PLACES=197, PETRI_TRANSITIONS=392} [2024-06-27 18:48:35,190 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 146 predicate places. [2024-06-27 18:48:35,190 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 392 transitions, 6654 flow [2024-06-27 18:48:35,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:35,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:35,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:35,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:48:35,191 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:35,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1397728379, now seen corresponding path program 5 times [2024-06-27 18:48:35,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:35,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046125724] [2024-06-27 18:48:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:35,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:38,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:38,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046125724] [2024-06-27 18:48:38,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046125724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:38,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:38,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:48:38,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647010131] [2024-06-27 18:48:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:38,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:48:38,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:38,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:48:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:48:38,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:38,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 392 transitions, 6654 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:38,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:38,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:38,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand