./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_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/safe002_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/safe002_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe002_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 18:48:14,042 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:48:14,108 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:48:14,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:48:14,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:48:14,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:48:14,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:48:14,125 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:48:14,126 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:48:14,126 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:48:14,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:48:14,127 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:48:14,127 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:48:14,127 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:48:14,128 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:48:14,128 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:48:14,128 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:48:14,129 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:48:14,129 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:48:14,129 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:48:14,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:48:14,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:48:14,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:48:14,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:48:14,131 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:48:14,131 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:48:14,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:48:14,132 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:48:14,132 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:48:14,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:48:14,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:48:14,133 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:48:14,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:48:14,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:48:14,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:48:14,134 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:48:14,134 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:48:14,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:48:14,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:48:14,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:48:14,135 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:48:14,135 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:48:14,135 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:48:14,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:48:14,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:48:14,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:48:14,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:48:14,317 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:48:14,318 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:48:14,319 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe002_power.oepc.yml/witness.yml [2024-06-27 18:48:14,481 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:48:14,482 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:48:14,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i [2024-06-27 18:48:15,596 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:48:15,828 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:48:15,828 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i [2024-06-27 18:48:15,843 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1903fb51/1f0f5bcde40d410c84688e01d610fb5e/FLAGd68556d24 [2024-06-27 18:48:15,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1903fb51/1f0f5bcde40d410c84688e01d610fb5e [2024-06-27 18:48:15,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:48:15,854 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:48:15,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:48:15,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:48:15,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:48:15,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:48:14" (1/2) ... [2024-06-27 18:48:15,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c77b9c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:48:15, skipping insertion in model container [2024-06-27 18:48:15,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:48:14" (1/2) ... [2024-06-27 18:48:15,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a1307a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:48:15, skipping insertion in model container [2024-06-27 18:48:15,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:48:15" (2/2) ... [2024-06-27 18:48:15,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c77b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:15, skipping insertion in model container [2024-06-27 18:48:15,862 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:48:15" (2/2) ... [2024-06-27 18:48:15,862 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:48:16,027 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:48:16,028 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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$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$read_delayed == (_Bool)0) [2024-06-27 18:48:16,028 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$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_p0_EBX == 0 || __unbuffered_p0_EBX == 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 18:48:16,028 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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$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 18:48:16,028 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:48:16,028 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 18:48:16,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:48:16,221 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/safe002_power.oepc.i[995,1008] [2024-06-27 18:48:16,401 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:48:16,409 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:48:16,436 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/safe002_power.oepc.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:48:16,534 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:48:16,574 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:48:16,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16 WrapperNode [2024-06-27 18:48:16,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:48:16,576 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:48:16,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:48:16,577 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:48:16,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,611 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,650 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 223 [2024-06-27 18:48:16,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:48:16,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:48:16,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:48:16,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:48:16,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,673 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,704 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 18:48:16,705 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,706 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,733 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,748 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:48:16,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:48:16,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:48:16,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:48:16,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (1/1) ... [2024-06-27 18:48:16,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:48:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:48:16,780 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 18:48:16,782 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 18:48:16,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:48:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:48:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:48:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:48:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:48:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:48:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:48:16,809 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:48:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:48:16,809 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:48:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:48:16,809 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:48:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:48:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:48:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:48:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:48:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:48:16,811 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 18:48:16,939 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:48:16,941 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:48:17,409 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:48:17,409 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:48:17,771 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:48:17,771 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:48:17,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:48:17 BoogieIcfgContainer [2024-06-27 18:48:17,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:48:17,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:48:17,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:48:17,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:48:17,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:48:14" (1/4) ... [2024-06-27 18:48:17,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee1cad4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:48:17, skipping insertion in model container [2024-06-27 18:48:17,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:48:15" (2/4) ... [2024-06-27 18:48:17,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee1cad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:48:17, skipping insertion in model container [2024-06-27 18:48:17,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:48:16" (3/4) ... [2024-06-27 18:48:17,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee1cad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:48:17, skipping insertion in model container [2024-06-27 18:48:17,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:48:17" (4/4) ... [2024-06-27 18:48:17,779 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_power.oepc.i [2024-06-27 18:48:17,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:48:17,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:48:17,793 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:48:17,850 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:48:17,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:48:17,909 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:48:17,909 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:48:17,912 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 18:48:17,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:48:17,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:48:17,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:48:17,938 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;@30a8b2a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:48:17,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:48:17,942 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:48:17,942 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:48:17,942 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:48:17,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:17,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:48:17,944 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 18:48:17,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash 877865398, now seen corresponding path program 1 times [2024-06-27 18:48:17,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:17,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492143947] [2024-06-27 18:48:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:17,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:19,532 INFO 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 18:48:19,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492143947] [2024-06-27 18:48:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492143947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:19,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:19,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:48:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477670802] [2024-06-27 18:48:19,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:19,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:48:19,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:48:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:48:19,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:48:19,580 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 18:48:19,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:19,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:48:19,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:20,618 INFO L124 PetriNetUnfolderBase]: 3185/4950 cut-off events. [2024-06-27 18:48:20,618 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 18:48:20,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9631 conditions, 4950 events. 3185/4950 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29051 event pairs, 1785 based on Foata normal form. 0/4767 useless extension candidates. Maximal degree in co-relation 9619. Up to 4593 conditions per place. [2024-06-27 18:48:20,676 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 46 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 18:48:20,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 235 flow [2024-06-27 18:48:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:48:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:48:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-27 18:48:20,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:48:20,703 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 90 transitions. [2024-06-27 18:48:20,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 235 flow [2024-06-27 18:48:20,705 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 18:48:20,708 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:48:20,710 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 18:48:20,713 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:48:20,714 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:48:20,714 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 18:48:20,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:20,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:20,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:48:20,715 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 18:48:20,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1815094837, now seen corresponding path program 1 times [2024-06-27 18:48:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:20,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022764930] [2024-06-27 18:48:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:20,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:22,790 INFO 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 18:48:22,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022764930] [2024-06-27 18:48:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022764930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:22,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:22,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:48:22,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594003765] [2024-06-27 18:48:22,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:22,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:48:22,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:22,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:48:22,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:48:22,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:48:22,805 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 18:48:22,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:22,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:48:22,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:23,812 INFO L124 PetriNetUnfolderBase]: 3176/4725 cut-off events. [2024-06-27 18:48:23,812 INFO L125 PetriNetUnfolderBase]: For 799/799 co-relation queries the response was YES. [2024-06-27 18:48:23,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10544 conditions, 4725 events. 3176/4725 cut-off events. For 799/799 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26843 event pairs, 1200 based on Foata normal form. 4/4724 useless extension candidates. Maximal degree in co-relation 10532. Up to 4520 conditions per place. [2024-06-27 18:48:23,833 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 64 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-27 18:48:23,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 367 flow [2024-06-27 18:48:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:48:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:48:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 18:48:23,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-06-27 18:48:23,835 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 122 transitions. [2024-06-27 18:48:23,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 367 flow [2024-06-27 18:48:23,836 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 18:48:23,837 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:48:23,837 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 18:48:23,838 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:48:23,838 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:48:23,838 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 18:48:23,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:23,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:23,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:48:23,839 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 18:48:23,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash -146746153, now seen corresponding path program 1 times [2024-06-27 18:48:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:23,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410133728] [2024-06-27 18:48:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:26,721 INFO 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 18:48:26,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:26,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410133728] [2024-06-27 18:48:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410133728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:26,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:26,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:48:26,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623524411] [2024-06-27 18:48:26,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:26,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:48:26,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:26,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:48:26,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:48:26,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:26,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 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 18:48:26,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:26,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:26,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:28,237 INFO L124 PetriNetUnfolderBase]: 4041/5921 cut-off events. [2024-06-27 18:48:28,238 INFO L125 PetriNetUnfolderBase]: For 3047/3047 co-relation queries the response was YES. [2024-06-27 18:48:28,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14675 conditions, 5921 events. 4041/5921 cut-off events. For 3047/3047 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 32475 event pairs, 964 based on Foata normal form. 8/5926 useless extension candidates. Maximal degree in co-relation 14660. Up to 5570 conditions per place. [2024-06-27 18:48:28,282 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 93 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2024-06-27 18:48:28,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 115 transitions, 566 flow [2024-06-27 18:48:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:48:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:48:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 18:48:28,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 18:48:28,287 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 6 states and 174 transitions. [2024-06-27 18:48:28,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 115 transitions, 566 flow [2024-06-27 18:48:28,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 115 transitions, 566 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:48:28,294 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 258 flow [2024-06-27 18:48:28,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 18:48:28,295 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-06-27 18:48:28,295 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 258 flow [2024-06-27 18:48:28,295 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 18:48:28,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:28,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:28,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:48:28,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:28,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:28,296 INFO L85 PathProgramCache]: Analyzing trace with hash 166545987, now seen corresponding path program 1 times [2024-06-27 18:48:28,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:28,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172898706] [2024-06-27 18:48:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:28,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:29,602 INFO 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 18:48:29,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:29,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172898706] [2024-06-27 18:48:29,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172898706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:29,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:29,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:48:29,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684838728] [2024-06-27 18:48:29,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:29,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:48:29,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:48:29,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:48:29,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:29,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:29,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:29,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:29,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:31,029 INFO L124 PetriNetUnfolderBase]: 4033/6190 cut-off events. [2024-06-27 18:48:31,030 INFO L125 PetriNetUnfolderBase]: For 5223/5223 co-relation queries the response was YES. [2024-06-27 18:48:31,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16171 conditions, 6190 events. 4033/6190 cut-off events. For 5223/5223 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35725 event pairs, 1531 based on Foata normal form. 3/6190 useless extension candidates. Maximal degree in co-relation 16151. Up to 5745 conditions per place. [2024-06-27 18:48:31,060 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 67 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-27 18:48:31,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 486 flow [2024-06-27 18:48:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:48:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:48:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 18:48:31,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502127659574468 [2024-06-27 18:48:31,062 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 258 flow. Second operand 5 states and 118 transitions. [2024-06-27 18:48:31,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 486 flow [2024-06-27 18:48:31,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 457 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 18:48:31,068 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 286 flow [2024-06-27 18:48:31,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 18:48:31,070 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-06-27 18:48:31,070 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 286 flow [2024-06-27 18:48:31,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:31,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:31,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:31,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:48:31,071 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 18:48:31,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 867960496, now seen corresponding path program 1 times [2024-06-27 18:48:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:31,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638101381] [2024-06-27 18:48:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:32,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:32,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638101381] [2024-06-27 18:48:32,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638101381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:32,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:32,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:48:32,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101841519] [2024-06-27 18:48:32,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:32,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:48:32,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:48:32,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:48:32,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:32,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:32,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:32,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:32,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:34,469 INFO L124 PetriNetUnfolderBase]: 4023/6170 cut-off events. [2024-06-27 18:48:34,470 INFO L125 PetriNetUnfolderBase]: For 7338/7338 co-relation queries the response was YES. [2024-06-27 18:48:34,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17189 conditions, 6170 events. 4023/6170 cut-off events. For 7338/7338 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34865 event pairs, 1651 based on Foata normal form. 4/6171 useless extension candidates. Maximal degree in co-relation 17167. Up to 5721 conditions per place. [2024-06-27 18:48:34,493 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 83 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-27 18:48:34,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 103 transitions, 622 flow [2024-06-27 18:48:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:48:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:48:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 18:48:34,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-06-27 18:48:34,498 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 286 flow. Second operand 6 states and 140 transitions. [2024-06-27 18:48:34,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 103 transitions, 622 flow [2024-06-27 18:48:34,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 581 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:48:34,507 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 382 flow [2024-06-27 18:48:34,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-27 18:48:34,510 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-27 18:48:34,510 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 382 flow [2024-06-27 18:48:34,510 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 18:48:34,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:34,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:34,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:48:34,511 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 18:48:34,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1131251970, now seen corresponding path program 1 times [2024-06-27 18:48:34,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:34,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276380084] [2024-06-27 18:48:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:36,922 INFO 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 18:48:36,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:36,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276380084] [2024-06-27 18:48:36,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276380084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:36,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:36,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:48:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044882408] [2024-06-27 18:48:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:36,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:48:36,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:48:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:48:36,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:36,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 382 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 18:48:36,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:36,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:36,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:38,685 INFO L124 PetriNetUnfolderBase]: 4077/5975 cut-off events. [2024-06-27 18:48:38,686 INFO L125 PetriNetUnfolderBase]: For 9919/9922 co-relation queries the response was YES. [2024-06-27 18:48:38,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18440 conditions, 5975 events. 4077/5975 cut-off events. For 9919/9922 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32683 event pairs, 1193 based on Foata normal form. 5/5976 useless extension candidates. Maximal degree in co-relation 18415. Up to 5639 conditions per place. [2024-06-27 18:48:38,716 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 95 selfloop transitions, 24 changer transitions 0/125 dead transitions. [2024-06-27 18:48:38,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 125 transitions, 818 flow [2024-06-27 18:48:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:48:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:48:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:48:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:48:38,718 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 382 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:48:38,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 125 transitions, 818 flow [2024-06-27 18:48:38,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 125 transitions, 806 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 18:48:38,727 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 508 flow [2024-06-27 18:48:38,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=508, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-27 18:48:38,728 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-27 18:48:38,728 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 508 flow [2024-06-27 18:48:38,728 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 18:48:38,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:38,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:38,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:48:38,729 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 18:48:38,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1881442980, now seen corresponding path program 2 times [2024-06-27 18:48:38,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:38,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866964516] [2024-06-27 18:48:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:38,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:40,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866964516] [2024-06-27 18:48:40,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866964516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:40,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:40,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:48:40,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130083492] [2024-06-27 18:48:40,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:40,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:48:40,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:48:40,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:48:40,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:40,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 508 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 18:48:40,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:40,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:40,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:42,641 INFO L124 PetriNetUnfolderBase]: 4069/5965 cut-off events. [2024-06-27 18:48:42,641 INFO L125 PetriNetUnfolderBase]: For 13945/13948 co-relation queries the response was YES. [2024-06-27 18:48:42,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19922 conditions, 5965 events. 4069/5965 cut-off events. For 13945/13948 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32537 event pairs, 1196 based on Foata normal form. 5/5965 useless extension candidates. Maximal degree in co-relation 19893. Up to 5632 conditions per place. [2024-06-27 18:48:42,678 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 90 selfloop transitions, 24 changer transitions 0/120 dead transitions. [2024-06-27 18:48:42,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 848 flow [2024-06-27 18:48:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:48:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:48:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:48:42,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 18:48:42,680 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 508 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:48:42,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 848 flow [2024-06-27 18:48:42,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 832 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 18:48:42,695 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 550 flow [2024-06-27 18:48:42,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-27 18:48:42,696 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2024-06-27 18:48:42,697 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 550 flow [2024-06-27 18:48:42,697 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 18:48:42,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:42,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:42,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:48:42,697 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 18:48:42,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1447989267, now seen corresponding path program 1 times [2024-06-27 18:48:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:42,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847524161] [2024-06-27 18:48:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:45,737 INFO 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 18:48:45,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:45,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847524161] [2024-06-27 18:48:45,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847524161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:45,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:45,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:48:45,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6433725] [2024-06-27 18:48:45,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:45,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:48:45,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:45,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:48:45,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:48:45,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:45,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 550 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 18:48:45,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:45,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:45,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:47,783 INFO L124 PetriNetUnfolderBase]: 4291/6297 cut-off events. [2024-06-27 18:48:47,784 INFO L125 PetriNetUnfolderBase]: For 15607/15609 co-relation queries the response was YES. [2024-06-27 18:48:47,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21390 conditions, 6297 events. 4291/6297 cut-off events. For 15607/15609 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 34476 event pairs, 1198 based on Foata normal form. 5/6299 useless extension candidates. Maximal degree in co-relation 21358. Up to 5882 conditions per place. [2024-06-27 18:48:47,825 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 125 selfloop transitions, 32 changer transitions 0/163 dead transitions. [2024-06-27 18:48:47,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 163 transitions, 1156 flow [2024-06-27 18:48:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:48:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:48:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:48:47,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:48:47,828 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 550 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:48:47,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 163 transitions, 1156 flow [2024-06-27 18:48:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 163 transitions, 1104 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:48:47,843 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 726 flow [2024-06-27 18:48:47,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=726, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2024-06-27 18:48:47,845 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 34 predicate places. [2024-06-27 18:48:47,845 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 726 flow [2024-06-27 18:48:47,845 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 18:48:47,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:47,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:47,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:48:47,845 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 18:48:47,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash 879772491, now seen corresponding path program 2 times [2024-06-27 18:48:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:47,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033724267] [2024-06-27 18:48:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:47,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:50,732 INFO 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 18:48:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033724267] [2024-06-27 18:48:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033724267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:48:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303284506] [2024-06-27 18:48:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:48:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:48:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:48:50,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:50,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 726 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 18:48:50,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:50,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:50,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:52,688 INFO L124 PetriNetUnfolderBase]: 4345/6399 cut-off events. [2024-06-27 18:48:52,689 INFO L125 PetriNetUnfolderBase]: For 20501/20505 co-relation queries the response was YES. [2024-06-27 18:48:52,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23635 conditions, 6399 events. 4345/6399 cut-off events. For 20501/20505 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35382 event pairs, 1152 based on Foata normal form. 7/6403 useless extension candidates. Maximal degree in co-relation 23600. Up to 5880 conditions per place. [2024-06-27 18:48:52,722 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 123 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-06-27 18:48:52,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 160 transitions, 1266 flow [2024-06-27 18:48:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:48:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:48:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:48:52,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-27 18:48:52,724 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 726 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:48:52,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 160 transitions, 1266 flow [2024-06-27 18:48:52,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 160 transitions, 1196 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:48:52,744 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 765 flow [2024-06-27 18:48:52,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=765, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-27 18:48:52,745 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 37 predicate places. [2024-06-27 18:48:52,745 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 765 flow [2024-06-27 18:48:52,746 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 18:48:52,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:52,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:52,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:48:52,746 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 18:48:52,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash 408321975, now seen corresponding path program 3 times [2024-06-27 18:48:52,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:52,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541485514] [2024-06-27 18:48:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:52,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:55,166 INFO 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 18:48:55,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:55,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541485514] [2024-06-27 18:48:55,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541485514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:55,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:55,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:48:55,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124729176] [2024-06-27 18:48:55,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:55,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:48:55,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:48:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:48:55,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:55,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 765 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 18:48:55,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:55,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:55,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:57,044 INFO L124 PetriNetUnfolderBase]: 4399/6471 cut-off events. [2024-06-27 18:48:57,044 INFO L125 PetriNetUnfolderBase]: For 25779/25784 co-relation queries the response was YES. [2024-06-27 18:48:57,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25088 conditions, 6471 events. 4399/6471 cut-off events. For 25779/25784 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 35541 event pairs, 1222 based on Foata normal form. 5/6472 useless extension candidates. Maximal degree in co-relation 25053. Up to 5700 conditions per place. [2024-06-27 18:48:57,080 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 111 selfloop transitions, 45 changer transitions 0/162 dead transitions. [2024-06-27 18:48:57,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 162 transitions, 1363 flow [2024-06-27 18:48:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:48:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:48:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:48:57,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 18:48:57,082 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 765 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:48:57,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 162 transitions, 1363 flow [2024-06-27 18:48:57,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 162 transitions, 1300 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 18:48:57,106 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 874 flow [2024-06-27 18:48:57,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-27 18:48:57,106 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 39 predicate places. [2024-06-27 18:48:57,106 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 874 flow [2024-06-27 18:48:57,107 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 18:48:57,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:57,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:57,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:48:57,107 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 18:48:57,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash 709074897, now seen corresponding path program 1 times [2024-06-27 18:48:57,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:57,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286190287] [2024-06-27 18:48:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:57,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:59,558 INFO 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 18:48:59,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286190287] [2024-06-27 18:48:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286190287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:59,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:59,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:48:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483856954] [2024-06-27 18:48:59,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:59,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:48:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:48:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:48:59,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:59,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 874 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 18:48:59,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:59,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:59,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:01,474 INFO L124 PetriNetUnfolderBase]: 5095/7502 cut-off events. [2024-06-27 18:49:01,474 INFO L125 PetriNetUnfolderBase]: For 33595/33602 co-relation queries the response was YES. [2024-06-27 18:49:01,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29447 conditions, 7502 events. 5095/7502 cut-off events. For 33595/33602 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 41749 event pairs, 1218 based on Foata normal form. 16/7514 useless extension candidates. Maximal degree in co-relation 29411. Up to 6454 conditions per place. [2024-06-27 18:49:01,510 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 155 selfloop transitions, 44 changer transitions 0/205 dead transitions. [2024-06-27 18:49:01,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 205 transitions, 1710 flow [2024-06-27 18:49:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:49:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:49:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:49:01,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 18:49:01,513 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 874 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:49:01,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 205 transitions, 1710 flow [2024-06-27 18:49:01,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 205 transitions, 1664 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 18:49:01,543 INFO L231 Difference]: Finished difference. Result has 98 places, 123 transitions, 1078 flow [2024-06-27 18:49:01,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1078, PETRI_PLACES=98, PETRI_TRANSITIONS=123} [2024-06-27 18:49:01,544 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 47 predicate places. [2024-06-27 18:49:01,544 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 123 transitions, 1078 flow [2024-06-27 18:49:01,544 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 18:49:01,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:01,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:01,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:49:01,545 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 18:49:01,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:01,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1804807755, now seen corresponding path program 4 times [2024-06-27 18:49:01,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:01,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921656797] [2024-06-27 18:49:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:01,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:03,946 INFO 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 18:49:03,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:03,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921656797] [2024-06-27 18:49:03,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921656797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:03,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:03,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:03,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308444845] [2024-06-27 18:49:03,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:03,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:03,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:03,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:03,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:03,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:03,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 123 transitions, 1078 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 18:49:03,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:03,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:03,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:05,965 INFO L124 PetriNetUnfolderBase]: 5087/7465 cut-off events. [2024-06-27 18:49:05,965 INFO L125 PetriNetUnfolderBase]: For 44333/44341 co-relation queries the response was YES. [2024-06-27 18:49:05,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33307 conditions, 7465 events. 5087/7465 cut-off events. For 44333/44341 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41162 event pairs, 1309 based on Foata normal form. 4/7456 useless extension candidates. Maximal degree in co-relation 33267. Up to 6637 conditions per place. [2024-06-27 18:49:06,016 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 124 selfloop transitions, 45 changer transitions 0/175 dead transitions. [2024-06-27 18:49:06,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 175 transitions, 1636 flow [2024-06-27 18:49:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:49:06,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 18:49:06,018 INFO L175 Difference]: Start difference. First operand has 98 places, 123 transitions, 1078 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:49:06,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 175 transitions, 1636 flow [2024-06-27 18:49:06,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 175 transitions, 1552 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:06,062 INFO L231 Difference]: Finished difference. Result has 101 places, 123 transitions, 1092 flow [2024-06-27 18:49:06,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=101, PETRI_TRANSITIONS=123} [2024-06-27 18:49:06,063 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 50 predicate places. [2024-06-27 18:49:06,063 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 123 transitions, 1092 flow [2024-06-27 18:49:06,064 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 18:49:06,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:06,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:06,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:49:06,064 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 18:49:06,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1742107717, now seen corresponding path program 2 times [2024-06-27 18:49:06,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:06,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475889086] [2024-06-27 18:49:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:06,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:49:08,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:08,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475889086] [2024-06-27 18:49:08,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475889086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:08,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:08,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127948991] [2024-06-27 18:49:08,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:08,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:08,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:08,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:08,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:08,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 123 transitions, 1092 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 18:49:08,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:08,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:08,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:10,309 INFO L124 PetriNetUnfolderBase]: 5171/7576 cut-off events. [2024-06-27 18:49:10,309 INFO L125 PetriNetUnfolderBase]: For 46270/46279 co-relation queries the response was YES. [2024-06-27 18:49:10,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33885 conditions, 7576 events. 5171/7576 cut-off events. For 46270/46279 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 41829 event pairs, 1218 based on Foata normal form. 16/7585 useless extension candidates. Maximal degree in co-relation 33843. Up to 6826 conditions per place. [2024-06-27 18:49:10,358 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 152 selfloop transitions, 38 changer transitions 0/196 dead transitions. [2024-06-27 18:49:10,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 196 transitions, 1823 flow [2024-06-27 18:49:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:49:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:49:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:49:10,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:49:10,361 INFO L175 Difference]: Start difference. First operand has 101 places, 123 transitions, 1092 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:49:10,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 196 transitions, 1823 flow [2024-06-27 18:49:10,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 196 transitions, 1705 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:49:10,408 INFO L231 Difference]: Finished difference. Result has 104 places, 132 transitions, 1170 flow [2024-06-27 18:49:10,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1170, PETRI_PLACES=104, PETRI_TRANSITIONS=132} [2024-06-27 18:49:10,409 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 53 predicate places. [2024-06-27 18:49:10,409 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 132 transitions, 1170 flow [2024-06-27 18:49:10,409 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 18:49:10,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:10,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:10,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:49:10,409 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 18:49:10,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash 886443567, now seen corresponding path program 3 times [2024-06-27 18:49:10,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:10,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643452533] [2024-06-27 18:49:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:10,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:49:12,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:12,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643452533] [2024-06-27 18:49:12,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643452533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:12,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:12,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772549633] [2024-06-27 18:49:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:12,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:12,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:12,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 132 transitions, 1170 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 18:49:12,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:12,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:12,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:14,405 INFO L124 PetriNetUnfolderBase]: 5171/7556 cut-off events. [2024-06-27 18:49:14,405 INFO L125 PetriNetUnfolderBase]: For 46873/46882 co-relation queries the response was YES. [2024-06-27 18:49:14,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34704 conditions, 7556 events. 5171/7556 cut-off events. For 46873/46882 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 40755 event pairs, 1308 based on Foata normal form. 10/7559 useless extension candidates. Maximal degree in co-relation 34660. Up to 7017 conditions per place. [2024-06-27 18:49:14,466 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 171 selfloop transitions, 34 changer transitions 0/211 dead transitions. [2024-06-27 18:49:14,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 211 transitions, 2036 flow [2024-06-27 18:49:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:49:14,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-27 18:49:14,468 INFO L175 Difference]: Start difference. First operand has 104 places, 132 transitions, 1170 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:49:14,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 211 transitions, 2036 flow [2024-06-27 18:49:14,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 211 transitions, 1933 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:14,534 INFO L231 Difference]: Finished difference. Result has 110 places, 155 transitions, 1452 flow [2024-06-27 18:49:14,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1452, PETRI_PLACES=110, PETRI_TRANSITIONS=155} [2024-06-27 18:49:14,535 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2024-06-27 18:49:14,535 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 155 transitions, 1452 flow [2024-06-27 18:49:14,535 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 18:49:14,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:14,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:14,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:49:14,536 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 18:49:14,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash 886452495, now seen corresponding path program 1 times [2024-06-27 18:49:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:14,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381686639] [2024-06-27 18:49:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:49:17,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:17,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381686639] [2024-06-27 18:49:17,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381686639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:17,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644497777] [2024-06-27 18:49:17,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:17,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:17,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:17,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:17,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:17,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 155 transitions, 1452 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 18:49:17,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:17,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:17,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:19,126 INFO L124 PetriNetUnfolderBase]: 5163/7815 cut-off events. [2024-06-27 18:49:19,126 INFO L125 PetriNetUnfolderBase]: For 53565/53567 co-relation queries the response was YES. [2024-06-27 18:49:19,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36625 conditions, 7815 events. 5163/7815 cut-off events. For 53565/53567 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 44240 event pairs, 1611 based on Foata normal form. 4/7816 useless extension candidates. Maximal degree in co-relation 36576. Up to 7237 conditions per place. [2024-06-27 18:49:19,174 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 177 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2024-06-27 18:49:19,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 200 transitions, 1994 flow [2024-06-27 18:49:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:49:19,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 18:49:19,176 INFO L175 Difference]: Start difference. First operand has 110 places, 155 transitions, 1452 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:49:19,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 200 transitions, 1994 flow [2024-06-27 18:49:19,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 200 transitions, 1964 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 18:49:19,238 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 1512 flow [2024-06-27 18:49:19,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1512, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-06-27 18:49:19,239 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-06-27 18:49:19,239 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 1512 flow [2024-06-27 18:49:19,239 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 18:49:19,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:19,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:19,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:49:19,240 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 18:49:19,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash 506337606, now seen corresponding path program 1 times [2024-06-27 18:49:19,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:19,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420087134] [2024-06-27 18:49:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:19,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:22,371 INFO 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 18:49:22,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:22,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420087134] [2024-06-27 18:49:22,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420087134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:22,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:22,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839533241] [2024-06-27 18:49:22,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:22,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:22,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:22,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:22,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 1512 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 18:49:22,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:22,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:22,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:25,008 INFO L124 PetriNetUnfolderBase]: 5607/8226 cut-off events. [2024-06-27 18:49:25,009 INFO L125 PetriNetUnfolderBase]: For 63518/63526 co-relation queries the response was YES. [2024-06-27 18:49:25,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39938 conditions, 8226 events. 5607/8226 cut-off events. For 63518/63526 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 45625 event pairs, 1268 based on Foata normal form. 18/8241 useless extension candidates. Maximal degree in co-relation 39886. Up to 7200 conditions per place. [2024-06-27 18:49:25,086 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 203 selfloop transitions, 56 changer transitions 0/265 dead transitions. [2024-06-27 18:49:25,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 265 transitions, 2614 flow [2024-06-27 18:49:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:49:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:49:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 18:49:25,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:49:25,089 INFO L175 Difference]: Start difference. First operand has 116 places, 158 transitions, 1512 flow. Second operand 10 states and 255 transitions. [2024-06-27 18:49:25,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 265 transitions, 2614 flow [2024-06-27 18:49:25,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 265 transitions, 2550 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 18:49:25,178 INFO L231 Difference]: Finished difference. Result has 123 places, 176 transitions, 1824 flow [2024-06-27 18:49:25,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1824, PETRI_PLACES=123, PETRI_TRANSITIONS=176} [2024-06-27 18:49:25,179 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2024-06-27 18:49:25,179 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 176 transitions, 1824 flow [2024-06-27 18:49:25,179 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 18:49:25,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:25,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:25,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:49:25,180 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 18:49:25,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash 506481756, now seen corresponding path program 2 times [2024-06-27 18:49:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:25,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312778475] [2024-06-27 18:49:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:25,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:28,041 INFO 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 18:49:28,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:28,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312778475] [2024-06-27 18:49:28,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312778475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:28,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:28,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:28,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578296315] [2024-06-27 18:49:28,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:28,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:28,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:28,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 176 transitions, 1824 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 18:49:28,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:28,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:28,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:30,693 INFO L124 PetriNetUnfolderBase]: 6593/9613 cut-off events. [2024-06-27 18:49:30,693 INFO L125 PetriNetUnfolderBase]: For 99122/99127 co-relation queries the response was YES. [2024-06-27 18:49:30,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51331 conditions, 9613 events. 6593/9613 cut-off events. For 99122/99127 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 53848 event pairs, 1426 based on Foata normal form. 12/9621 useless extension candidates. Maximal degree in co-relation 51276. Up to 6738 conditions per place. [2024-06-27 18:49:30,767 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 197 selfloop transitions, 110 changer transitions 0/313 dead transitions. [2024-06-27 18:49:30,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 313 transitions, 3454 flow [2024-06-27 18:49:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:49:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:49:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-06-27 18:49:30,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822050290135397 [2024-06-27 18:49:30,769 INFO L175 Difference]: Start difference. First operand has 123 places, 176 transitions, 1824 flow. Second operand 11 states and 301 transitions. [2024-06-27 18:49:30,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 313 transitions, 3454 flow [2024-06-27 18:49:30,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 313 transitions, 3259 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 18:49:30,889 INFO L231 Difference]: Finished difference. Result has 131 places, 199 transitions, 2300 flow [2024-06-27 18:49:30,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2300, PETRI_PLACES=131, PETRI_TRANSITIONS=199} [2024-06-27 18:49:30,890 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 80 predicate places. [2024-06-27 18:49:30,890 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 199 transitions, 2300 flow [2024-06-27 18:49:30,890 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 18:49:30,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:30,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:30,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:49:30,891 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 18:49:30,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:30,891 INFO L85 PathProgramCache]: Analyzing trace with hash 506487336, now seen corresponding path program 3 times [2024-06-27 18:49:30,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:30,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313597624] [2024-06-27 18:49:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:30,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:33,743 INFO 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 18:49:33,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:33,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313597624] [2024-06-27 18:49:33,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313597624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:33,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:33,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:33,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873352319] [2024-06-27 18:49:33,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:33,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:33,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:33,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:33,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 199 transitions, 2300 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 18:49:33,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:33,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:33,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:36,284 INFO L124 PetriNetUnfolderBase]: 6781/9915 cut-off events. [2024-06-27 18:49:36,285 INFO L125 PetriNetUnfolderBase]: For 129917/129922 co-relation queries the response was YES. [2024-06-27 18:49:36,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57844 conditions, 9915 events. 6781/9915 cut-off events. For 129917/129922 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 56042 event pairs, 1334 based on Foata normal form. 12/9923 useless extension candidates. Maximal degree in co-relation 57785. Up to 6879 conditions per place. [2024-06-27 18:49:36,364 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 176 selfloop transitions, 122 changer transitions 0/304 dead transitions. [2024-06-27 18:49:36,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 304 transitions, 3643 flow [2024-06-27 18:49:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:49:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:49:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-06-27 18:49:36,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723404255319149 [2024-06-27 18:49:36,366 INFO L175 Difference]: Start difference. First operand has 131 places, 199 transitions, 2300 flow. Second operand 10 states and 269 transitions. [2024-06-27 18:49:36,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 304 transitions, 3643 flow [2024-06-27 18:49:36,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 304 transitions, 3426 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-27 18:49:36,528 INFO L231 Difference]: Finished difference. Result has 138 places, 210 transitions, 2611 flow [2024-06-27 18:49:36,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2611, PETRI_PLACES=138, PETRI_TRANSITIONS=210} [2024-06-27 18:49:36,528 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 87 predicate places. [2024-06-27 18:49:36,529 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 210 transitions, 2611 flow [2024-06-27 18:49:36,529 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 18:49:36,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:36,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:36,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:49:36,529 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 18:49:36,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -114457782, now seen corresponding path program 4 times [2024-06-27 18:49:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414685762] [2024-06-27 18:49:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:36,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:39,322 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 18:49:39,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:39,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414685762] [2024-06-27 18:49:39,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414685762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:39,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:39,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:39,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401021849] [2024-06-27 18:49:39,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:39,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:39,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:39,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:39,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 210 transitions, 2611 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 18:49:39,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:39,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:39,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:41,954 INFO L124 PetriNetUnfolderBase]: 7093/10362 cut-off events. [2024-06-27 18:49:41,954 INFO L125 PetriNetUnfolderBase]: For 143559/143570 co-relation queries the response was YES. [2024-06-27 18:49:41,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62689 conditions, 10362 events. 7093/10362 cut-off events. For 143559/143570 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 58822 event pairs, 1455 based on Foata normal form. 12/10361 useless extension candidates. Maximal degree in co-relation 62626. Up to 8552 conditions per place. [2024-06-27 18:49:42,031 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 211 selfloop transitions, 81 changer transitions 0/298 dead transitions. [2024-06-27 18:49:42,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 298 transitions, 3905 flow [2024-06-27 18:49:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:49:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:49:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:49:42,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:49:42,033 INFO L175 Difference]: Start difference. First operand has 138 places, 210 transitions, 2611 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:49:42,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 298 transitions, 3905 flow [2024-06-27 18:49:42,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 298 transitions, 3627 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 18:49:42,224 INFO L231 Difference]: Finished difference. Result has 142 places, 222 transitions, 2772 flow [2024-06-27 18:49:42,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2772, PETRI_PLACES=142, PETRI_TRANSITIONS=222} [2024-06-27 18:49:42,224 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 91 predicate places. [2024-06-27 18:49:42,224 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 222 transitions, 2772 flow [2024-06-27 18:49:42,225 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 18:49:42,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:42,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:49:42,225 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 18:49:42,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1702591580, now seen corresponding path program 5 times [2024-06-27 18:49:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905173777] [2024-06-27 18:49:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:42,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:44,711 INFO 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 18:49:44,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:44,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905173777] [2024-06-27 18:49:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905173777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:44,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:44,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660466934] [2024-06-27 18:49:44,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:44,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:44,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:44,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 222 transitions, 2772 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 18:49:44,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:44,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:44,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:47,617 INFO L124 PetriNetUnfolderBase]: 7073/10334 cut-off events. [2024-06-27 18:49:47,617 INFO L125 PetriNetUnfolderBase]: For 145934/145945 co-relation queries the response was YES. [2024-06-27 18:49:47,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61495 conditions, 10334 events. 7073/10334 cut-off events. For 145934/145945 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 58659 event pairs, 1494 based on Foata normal form. 12/10333 useless extension candidates. Maximal degree in co-relation 61430. Up to 8541 conditions per place. [2024-06-27 18:49:47,704 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 225 selfloop transitions, 81 changer transitions 0/312 dead transitions. [2024-06-27 18:49:47,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 312 transitions, 3883 flow [2024-06-27 18:49:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:49:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:49:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-27 18:49:47,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574468085106383 [2024-06-27 18:49:47,707 INFO L175 Difference]: Start difference. First operand has 142 places, 222 transitions, 2772 flow. Second operand 10 states and 262 transitions. [2024-06-27 18:49:47,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 312 transitions, 3883 flow [2024-06-27 18:49:47,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 312 transitions, 3589 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-27 18:49:47,994 INFO L231 Difference]: Finished difference. Result has 147 places, 222 transitions, 2652 flow [2024-06-27 18:49:47,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2652, PETRI_PLACES=147, PETRI_TRANSITIONS=222} [2024-06-27 18:49:47,994 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 96 predicate places. [2024-06-27 18:49:47,995 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 222 transitions, 2652 flow [2024-06-27 18:49:47,995 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 18:49:47,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:47,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:47,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:49:47,996 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 18:49:47,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:47,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1709948810, now seen corresponding path program 6 times [2024-06-27 18:49:47,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:47,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110505109] [2024-06-27 18:49:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:47,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:50,396 INFO 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 18:49:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110505109] [2024-06-27 18:49:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110505109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:50,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:50,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898116127] [2024-06-27 18:49:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:50,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:50,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 222 transitions, 2652 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 18:49:50,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:50,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:50,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:53,251 INFO L124 PetriNetUnfolderBase]: 7073/10304 cut-off events. [2024-06-27 18:49:53,251 INFO L125 PetriNetUnfolderBase]: For 131662/131673 co-relation queries the response was YES. [2024-06-27 18:49:53,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60500 conditions, 10304 events. 7073/10304 cut-off events. For 131662/131673 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 57617 event pairs, 1490 based on Foata normal form. 6/10297 useless extension candidates. Maximal degree in co-relation 60433. Up to 9083 conditions per place. [2024-06-27 18:49:53,339 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 254 selfloop transitions, 71 changer transitions 0/331 dead transitions. [2024-06-27 18:49:53,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 331 transitions, 4198 flow [2024-06-27 18:49:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:49:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:49:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:49:53,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:49:53,347 INFO L175 Difference]: Start difference. First operand has 147 places, 222 transitions, 2652 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:49:53,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 331 transitions, 4198 flow [2024-06-27 18:49:53,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 331 transitions, 3959 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 18:49:53,717 INFO L231 Difference]: Finished difference. Result has 149 places, 258 transitions, 3212 flow [2024-06-27 18:49:53,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3212, PETRI_PLACES=149, PETRI_TRANSITIONS=258} [2024-06-27 18:49:53,718 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 98 predicate places. [2024-06-27 18:49:53,718 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 258 transitions, 3212 flow [2024-06-27 18:49:53,718 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 18:49:53,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:53,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:49:53,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:49:53,719 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 18:49:53,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:53,719 INFO L85 PathProgramCache]: Analyzing trace with hash 740342888, now seen corresponding path program 1 times [2024-06-27 18:49:53,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:53,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411054618] [2024-06-27 18:49:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:53,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:56,622 INFO 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 18:49:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411054618] [2024-06-27 18:49:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411054618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:56,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:56,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:56,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805821738] [2024-06-27 18:49:56,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:56,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:56,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 258 transitions, 3212 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 18:49:56,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:56,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:56,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:59,598 INFO L124 PetriNetUnfolderBase]: 7262/10667 cut-off events. [2024-06-27 18:49:59,598 INFO L125 PetriNetUnfolderBase]: For 151937/151945 co-relation queries the response was YES. [2024-06-27 18:49:59,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64821 conditions, 10667 events. 7262/10667 cut-off events. For 151937/151945 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 61346 event pairs, 1213 based on Foata normal form. 14/10678 useless extension candidates. Maximal degree in co-relation 64751. Up to 9449 conditions per place. [2024-06-27 18:49:59,698 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 286 selfloop transitions, 56 changer transitions 0/348 dead transitions. [2024-06-27 18:49:59,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 348 transitions, 4553 flow [2024-06-27 18:49:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:49:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:49:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 18:49:59,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460992907801419 [2024-06-27 18:49:59,700 INFO L175 Difference]: Start difference. First operand has 149 places, 258 transitions, 3212 flow. Second operand 9 states and 231 transitions. [2024-06-27 18:49:59,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 348 transitions, 4553 flow [2024-06-27 18:50:00,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 348 transitions, 4506 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-27 18:50:00,005 INFO L231 Difference]: Finished difference. Result has 156 places, 262 transitions, 3396 flow [2024-06-27 18:50:00,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3396, PETRI_PLACES=156, PETRI_TRANSITIONS=262} [2024-06-27 18:50:00,005 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 105 predicate places. [2024-06-27 18:50:00,005 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 262 transitions, 3396 flow [2024-06-27 18:50:00,006 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 18:50:00,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:00,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:00,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:50:00,006 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 18:50:00,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1594228652, now seen corresponding path program 2 times [2024-06-27 18:50:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:00,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325750649] [2024-06-27 18:50:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:00,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:03,089 INFO 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 18:50:03,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:03,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325750649] [2024-06-27 18:50:03,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325750649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:03,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:03,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:03,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128301539] [2024-06-27 18:50:03,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:03,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:03,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:03,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:03,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:03,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 262 transitions, 3396 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 18:50:03,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:03,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:03,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:05,953 INFO L124 PetriNetUnfolderBase]: 7249/10648 cut-off events. [2024-06-27 18:50:05,954 INFO L125 PetriNetUnfolderBase]: For 159114/159122 co-relation queries the response was YES. [2024-06-27 18:50:06,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65620 conditions, 10648 events. 7249/10648 cut-off events. For 159114/159122 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 61001 event pairs, 1608 based on Foata normal form. 14/10659 useless extension candidates. Maximal degree in co-relation 65547. Up to 9705 conditions per place. [2024-06-27 18:50:06,057 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 275 selfloop transitions, 52 changer transitions 0/333 dead transitions. [2024-06-27 18:50:06,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 333 transitions, 4425 flow [2024-06-27 18:50:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:50:06,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 18:50:06,059 INFO L175 Difference]: Start difference. First operand has 156 places, 262 transitions, 3396 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:50:06,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 333 transitions, 4425 flow [2024-06-27 18:50:06,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 333 transitions, 4307 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 18:50:06,360 INFO L231 Difference]: Finished difference. Result has 159 places, 262 transitions, 3394 flow [2024-06-27 18:50:06,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3394, PETRI_PLACES=159, PETRI_TRANSITIONS=262} [2024-06-27 18:50:06,360 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 108 predicate places. [2024-06-27 18:50:06,360 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 262 transitions, 3394 flow [2024-06-27 18:50:06,361 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 18:50:06,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:06,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:50:06,361 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 18:50:06,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1478937482, now seen corresponding path program 3 times [2024-06-27 18:50:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:06,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927568388] [2024-06-27 18:50:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:09,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927568388] [2024-06-27 18:50:09,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927568388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:09,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:09,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:09,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555985821] [2024-06-27 18:50:09,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:09,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:09,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:09,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:09,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:09,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 262 transitions, 3394 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 18:50:09,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:09,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:09,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:12,282 INFO L124 PetriNetUnfolderBase]: 7337/10711 cut-off events. [2024-06-27 18:50:12,282 INFO L125 PetriNetUnfolderBase]: For 165019/165024 co-relation queries the response was YES. [2024-06-27 18:50:12,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66727 conditions, 10711 events. 7337/10711 cut-off events. For 165019/165024 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 60852 event pairs, 1625 based on Foata normal form. 8/10715 useless extension candidates. Maximal degree in co-relation 66652. Up to 9613 conditions per place. [2024-06-27 18:50:12,392 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 71 changer transitions 0/332 dead transitions. [2024-06-27 18:50:12,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 332 transitions, 4512 flow [2024-06-27 18:50:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:50:12,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 18:50:12,394 INFO L175 Difference]: Start difference. First operand has 159 places, 262 transitions, 3394 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:50:12,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 332 transitions, 4512 flow [2024-06-27 18:50:12,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 332 transitions, 4398 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 18:50:12,705 INFO L231 Difference]: Finished difference. Result has 160 places, 264 transitions, 3492 flow [2024-06-27 18:50:12,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3492, PETRI_PLACES=160, PETRI_TRANSITIONS=264} [2024-06-27 18:50:12,705 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-27 18:50:12,705 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 264 transitions, 3492 flow [2024-06-27 18:50:12,706 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 18:50:12,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:12,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:12,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:50:12,706 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 18:50:12,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:12,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1478752784, now seen corresponding path program 1 times [2024-06-27 18:50:12,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:12,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574939481] [2024-06-27 18:50:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:12,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:16,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:16,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574939481] [2024-06-27 18:50:16,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574939481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:16,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:16,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:50:16,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540028352] [2024-06-27 18:50:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:16,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:50:16,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:16,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:50:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:50:16,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:16,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 264 transitions, 3492 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 18:50:16,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:16,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:16,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:19,283 INFO L124 PetriNetUnfolderBase]: 7653/11077 cut-off events. [2024-06-27 18:50:19,283 INFO L125 PetriNetUnfolderBase]: For 187323/187334 co-relation queries the response was YES. [2024-06-27 18:50:19,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69620 conditions, 11077 events. 7653/11077 cut-off events. For 187323/187334 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 62349 event pairs, 1499 based on Foata normal form. 28/11101 useless extension candidates. Maximal degree in co-relation 69544. Up to 9612 conditions per place. [2024-06-27 18:50:19,376 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 289 selfloop transitions, 68 changer transitions 0/363 dead transitions. [2024-06-27 18:50:19,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 363 transitions, 4766 flow [2024-06-27 18:50:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:50:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:50:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:50:19,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617021276595745 [2024-06-27 18:50:19,379 INFO L175 Difference]: Start difference. First operand has 160 places, 264 transitions, 3492 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:50:19,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 363 transitions, 4766 flow [2024-06-27 18:50:19,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 363 transitions, 4596 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:50:19,685 INFO L231 Difference]: Finished difference. Result has 164 places, 268 transitions, 3579 flow [2024-06-27 18:50:19,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3579, PETRI_PLACES=164, PETRI_TRANSITIONS=268} [2024-06-27 18:50:19,685 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-27 18:50:19,685 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 268 transitions, 3579 flow [2024-06-27 18:50:19,686 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 18:50:19,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:19,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:19,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:50:19,686 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 18:50:19,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash 746600340, now seen corresponding path program 4 times [2024-06-27 18:50:19,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:19,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474973273] [2024-06-27 18:50:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:19,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:22,348 INFO 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 18:50:22,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:22,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474973273] [2024-06-27 18:50:22,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474973273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:22,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:22,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:22,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422170473] [2024-06-27 18:50:22,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:22,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:22,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:22,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:22,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:22,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 268 transitions, 3579 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 18:50:22,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:22,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:22,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:25,255 INFO L124 PetriNetUnfolderBase]: 7640/11233 cut-off events. [2024-06-27 18:50:25,255 INFO L125 PetriNetUnfolderBase]: For 189381/189392 co-relation queries the response was YES. [2024-06-27 18:50:25,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70810 conditions, 11233 events. 7640/11233 cut-off events. For 189381/189392 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 64718 event pairs, 1723 based on Foata normal form. 8/11228 useless extension candidates. Maximal degree in co-relation 70733. Up to 10058 conditions per place. [2024-06-27 18:50:25,361 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 72 changer transitions 0/333 dead transitions. [2024-06-27 18:50:25,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 333 transitions, 4682 flow [2024-06-27 18:50:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:50:25,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:50:25,363 INFO L175 Difference]: Start difference. First operand has 164 places, 268 transitions, 3579 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:50:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 333 transitions, 4682 flow [2024-06-27 18:50:25,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 333 transitions, 4469 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 18:50:25,746 INFO L231 Difference]: Finished difference. Result has 164 places, 270 transitions, 3586 flow [2024-06-27 18:50:25,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3586, PETRI_PLACES=164, PETRI_TRANSITIONS=270} [2024-06-27 18:50:25,747 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-27 18:50:25,747 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 270 transitions, 3586 flow [2024-06-27 18:50:25,747 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 18:50:25,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:25,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:25,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:50:25,747 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 18:50:25,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -871658140, now seen corresponding path program 2 times [2024-06-27 18:50:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:25,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061585253] [2024-06-27 18:50:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:25,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:28,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:28,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061585253] [2024-06-27 18:50:28,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061585253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:28,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:28,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:50:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118844468] [2024-06-27 18:50:28,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:28,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:50:28,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:50:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:50:28,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:28,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 270 transitions, 3586 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 18:50:28,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:28,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:28,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:31,657 INFO L124 PetriNetUnfolderBase]: 7956/11645 cut-off events. [2024-06-27 18:50:31,658 INFO L125 PetriNetUnfolderBase]: For 206447/206468 co-relation queries the response was YES. [2024-06-27 18:50:31,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72632 conditions, 11645 events. 7956/11645 cut-off events. For 206447/206468 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 66936 event pairs, 1614 based on Foata normal form. 32/11670 useless extension candidates. Maximal degree in co-relation 72554. Up to 10375 conditions per place. [2024-06-27 18:50:31,772 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 292 selfloop transitions, 54 changer transitions 0/352 dead transitions. [2024-06-27 18:50:31,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 352 transitions, 4770 flow [2024-06-27 18:50:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:50:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:50:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:50:31,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541371158392435 [2024-06-27 18:50:31,774 INFO L175 Difference]: Start difference. First operand has 164 places, 270 transitions, 3586 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:50:31,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 352 transitions, 4770 flow [2024-06-27 18:50:32,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 352 transitions, 4594 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 18:50:32,093 INFO L231 Difference]: Finished difference. Result has 167 places, 274 transitions, 3649 flow [2024-06-27 18:50:32,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3649, PETRI_PLACES=167, PETRI_TRANSITIONS=274} [2024-06-27 18:50:32,093 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2024-06-27 18:50:32,094 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 274 transitions, 3649 flow [2024-06-27 18:50:32,094 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 18:50:32,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:32,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:32,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:50:32,094 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:50:32,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1477088752, now seen corresponding path program 3 times [2024-06-27 18:50:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:32,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775524815] [2024-06-27 18:50:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:32,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:35,118 INFO 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 18:50:35,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:35,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775524815] [2024-06-27 18:50:35,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775524815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:35,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:35,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:50:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605925273] [2024-06-27 18:50:35,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:35,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:50:35,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:50:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:50:35,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:35,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 274 transitions, 3649 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 18:50:35,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:35,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:35,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:38,375 INFO L124 PetriNetUnfolderBase]: 8006/11799 cut-off events. [2024-06-27 18:50:38,376 INFO L125 PetriNetUnfolderBase]: For 212869/212890 co-relation queries the response was YES. [2024-06-27 18:50:38,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74193 conditions, 11799 events. 8006/11799 cut-off events. For 212869/212890 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 68380 event pairs, 1618 based on Foata normal form. 18/11810 useless extension candidates. Maximal degree in co-relation 74114. Up to 10918 conditions per place. [2024-06-27 18:50:38,502 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 302 selfloop transitions, 36 changer transitions 0/344 dead transitions. [2024-06-27 18:50:38,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 344 transitions, 4723 flow [2024-06-27 18:50:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:50:38,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186170212765957 [2024-06-27 18:50:38,508 INFO L175 Difference]: Start difference. First operand has 167 places, 274 transitions, 3649 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:50:38,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 344 transitions, 4723 flow [2024-06-27 18:50:38,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 344 transitions, 4524 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 18:50:38,937 INFO L231 Difference]: Finished difference. Result has 168 places, 276 transitions, 3579 flow [2024-06-27 18:50:38,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3579, PETRI_PLACES=168, PETRI_TRANSITIONS=276} [2024-06-27 18:50:38,942 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-27 18:50:38,942 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 276 transitions, 3579 flow [2024-06-27 18:50:38,942 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 18:50:38,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:38,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:38,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:50:38,943 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 18:50:38,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:38,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1477385422, now seen corresponding path program 4 times [2024-06-27 18:50:38,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:38,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100157015] [2024-06-27 18:50:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:38,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:42,320 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 18:50:42,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:42,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100157015] [2024-06-27 18:50:42,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100157015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:42,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:42,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:50:42,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693770357] [2024-06-27 18:50:42,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:42,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:50:42,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:42,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:50:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:50:42,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:42,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 276 transitions, 3579 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 18:50:42,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:42,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:42,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:45,393 INFO L124 PetriNetUnfolderBase]: 8006/11799 cut-off events. [2024-06-27 18:50:45,393 INFO L125 PetriNetUnfolderBase]: For 212858/212879 co-relation queries the response was YES. [2024-06-27 18:50:45,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73541 conditions, 11799 events. 8006/11799 cut-off events. For 212858/212879 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 68466 event pairs, 1524 based on Foata normal form. 18/11810 useless extension candidates. Maximal degree in co-relation 73461. Up to 10716 conditions per place. [2024-06-27 18:50:45,503 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 303 selfloop transitions, 45 changer transitions 0/354 dead transitions. [2024-06-27 18:50:45,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 354 transitions, 4799 flow [2024-06-27 18:50:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:50:45,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186170212765957 [2024-06-27 18:50:45,505 INFO L175 Difference]: Start difference. First operand has 168 places, 276 transitions, 3579 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:50:45,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 354 transitions, 4799 flow [2024-06-27 18:50:45,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 354 transitions, 4720 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:50:45,851 INFO L231 Difference]: Finished difference. Result has 171 places, 283 transitions, 3748 flow [2024-06-27 18:50:45,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3748, PETRI_PLACES=171, PETRI_TRANSITIONS=283} [2024-06-27 18:50:45,852 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 18:50:45,852 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 283 transitions, 3748 flow [2024-06-27 18:50:45,852 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 18:50:45,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:45,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:45,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:50:45,853 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:50:45,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:45,853 INFO L85 PathProgramCache]: Analyzing trace with hash -35547285, now seen corresponding path program 1 times [2024-06-27 18:50:45,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:45,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884154650] [2024-06-27 18:50:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:45,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:47,688 INFO 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 18:50:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884154650] [2024-06-27 18:50:47,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884154650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:47,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:47,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:50:47,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219449366] [2024-06-27 18:50:47,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:47,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:50:47,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:50:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:50:47,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:50:47,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 283 transitions, 3748 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 18:50:47,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:47,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:50:47,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:50,119 INFO L124 PetriNetUnfolderBase]: 7275/11073 cut-off events. [2024-06-27 18:50:50,120 INFO L125 PetriNetUnfolderBase]: For 215030/215183 co-relation queries the response was YES. [2024-06-27 18:50:50,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69933 conditions, 11073 events. 7275/11073 cut-off events. For 215030/215183 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 67450 event pairs, 1962 based on Foata normal form. 60/10975 useless extension candidates. Maximal degree in co-relation 69851. Up to 9909 conditions per place. [2024-06-27 18:50:50,216 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 262 selfloop transitions, 13 changer transitions 0/306 dead transitions. [2024-06-27 18:50:50,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 306 transitions, 4420 flow [2024-06-27 18:50:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:50:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:50:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 18:50:50,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978723404255319 [2024-06-27 18:50:50,218 INFO L175 Difference]: Start difference. First operand has 171 places, 283 transitions, 3748 flow. Second operand 5 states and 117 transitions. [2024-06-27 18:50:50,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 306 transitions, 4420 flow [2024-06-27 18:50:50,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 306 transitions, 4333 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 18:50:50,586 INFO L231 Difference]: Finished difference. Result has 172 places, 287 transitions, 3774 flow [2024-06-27 18:50:50,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3774, PETRI_PLACES=172, PETRI_TRANSITIONS=287} [2024-06-27 18:50:50,586 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-27 18:50:50,586 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 287 transitions, 3774 flow [2024-06-27 18:50:50,587 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 18:50:50,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:50,587 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 18:50:50,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:50:50,587 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 18:50:50,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1606977055, now seen corresponding path program 1 times [2024-06-27 18:50:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:50,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188272801] [2024-06-27 18:50:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:53,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:53,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188272801] [2024-06-27 18:50:53,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188272801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:53,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:53,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:50:53,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874422355] [2024-06-27 18:50:53,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:53,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:50:53,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:50:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:50:53,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:50:53,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 287 transitions, 3774 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 18:50:53,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:53,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:50:53,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:58,264 INFO L124 PetriNetUnfolderBase]: 11486/17160 cut-off events. [2024-06-27 18:50:58,265 INFO L125 PetriNetUnfolderBase]: For 417218/417226 co-relation queries the response was YES. [2024-06-27 18:50:58,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107424 conditions, 17160 events. 11486/17160 cut-off events. For 417218/417226 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 108253 event pairs, 1799 based on Foata normal form. 72/17229 useless extension candidates. Maximal degree in co-relation 107340. Up to 10381 conditions per place. [2024-06-27 18:50:58,930 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 357 selfloop transitions, 74 changer transitions 0/437 dead transitions. [2024-06-27 18:50:58,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 437 transitions, 5961 flow [2024-06-27 18:50:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:50:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:50:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 326 transitions. [2024-06-27 18:50:58,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780141843971631 [2024-06-27 18:50:58,932 INFO L175 Difference]: Start difference. First operand has 172 places, 287 transitions, 3774 flow. Second operand 12 states and 326 transitions. [2024-06-27 18:50:58,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 437 transitions, 5961 flow [2024-06-27 18:50:59,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 437 transitions, 5876 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 18:50:59,583 INFO L231 Difference]: Finished difference. Result has 183 places, 298 transitions, 4218 flow [2024-06-27 18:50:59,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4218, PETRI_PLACES=183, PETRI_TRANSITIONS=298} [2024-06-27 18:50:59,583 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 132 predicate places. [2024-06-27 18:50:59,584 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 298 transitions, 4218 flow [2024-06-27 18:50:59,584 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 18:50:59,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:59,584 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 18:50:59,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:50:59,584 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 18:50:59,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2118669405, now seen corresponding path program 2 times [2024-06-27 18:50:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:59,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664726259] [2024-06-27 18:50:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:59,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:51:03,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:03,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664726259] [2024-06-27 18:51:03,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664726259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:03,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:03,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:03,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422562862] [2024-06-27 18:51:03,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:03,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:03,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:03,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:03,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:03,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:03,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 298 transitions, 4218 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 18:51:03,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:03,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:03,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:08,752 INFO L124 PetriNetUnfolderBase]: 12525/18749 cut-off events. [2024-06-27 18:51:08,752 INFO L125 PetriNetUnfolderBase]: For 492602/492610 co-relation queries the response was YES. [2024-06-27 18:51:08,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119331 conditions, 18749 events. 12525/18749 cut-off events. For 492602/492610 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 120632 event pairs, 3556 based on Foata normal form. 82/18828 useless extension candidates. Maximal degree in co-relation 119244. Up to 15744 conditions per place. [2024-06-27 18:51:08,947 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 329 selfloop transitions, 72 changer transitions 0/407 dead transitions. [2024-06-27 18:51:08,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 407 transitions, 5742 flow [2024-06-27 18:51:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:51:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:51:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 286 transitions. [2024-06-27 18:51:08,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:51:08,949 INFO L175 Difference]: Start difference. First operand has 183 places, 298 transitions, 4218 flow. Second operand 11 states and 286 transitions. [2024-06-27 18:51:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 407 transitions, 5742 flow [2024-06-27 18:51:10,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 407 transitions, 5488 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-27 18:51:10,149 INFO L231 Difference]: Finished difference. Result has 187 places, 301 transitions, 4248 flow [2024-06-27 18:51:10,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4248, PETRI_PLACES=187, PETRI_TRANSITIONS=301} [2024-06-27 18:51:10,150 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 136 predicate places. [2024-06-27 18:51:10,150 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 301 transitions, 4248 flow [2024-06-27 18:51:10,150 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 18:51:10,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:10,151 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 18:51:10,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:51:10,151 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 18:51:10,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:10,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2031829725, now seen corresponding path program 3 times [2024-06-27 18:51:10,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:10,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593778929] [2024-06-27 18:51:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:10,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:51:13,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:13,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593778929] [2024-06-27 18:51:13,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593778929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:13,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:13,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:13,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918571849] [2024-06-27 18:51:13,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:13,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:13,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:13,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:13,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 301 transitions, 4248 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 18:51:13,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:13,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:13,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:18,421 INFO L124 PetriNetUnfolderBase]: 13137/19697 cut-off events. [2024-06-27 18:51:18,422 INFO L125 PetriNetUnfolderBase]: For 453752/453760 co-relation queries the response was YES. [2024-06-27 18:51:18,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118414 conditions, 19697 events. 13137/19697 cut-off events. For 453752/453760 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 128204 event pairs, 3211 based on Foata normal form. 72/19766 useless extension candidates. Maximal degree in co-relation 118325. Up to 13582 conditions per place. [2024-06-27 18:51:18,624 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 344 selfloop transitions, 72 changer transitions 0/422 dead transitions. [2024-06-27 18:51:18,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 422 transitions, 6032 flow [2024-06-27 18:51:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:51:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:51:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-06-27 18:51:18,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562862669245648 [2024-06-27 18:51:18,626 INFO L175 Difference]: Start difference. First operand has 187 places, 301 transitions, 4248 flow. Second operand 11 states and 291 transitions. [2024-06-27 18:51:18,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 422 transitions, 6032 flow [2024-06-27 18:51:19,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 422 transitions, 5820 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 18:51:19,677 INFO L231 Difference]: Finished difference. Result has 190 places, 308 transitions, 4441 flow [2024-06-27 18:51:19,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4036, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4441, PETRI_PLACES=190, PETRI_TRANSITIONS=308} [2024-06-27 18:51:19,677 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 139 predicate places. [2024-06-27 18:51:19,677 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 308 transitions, 4441 flow [2024-06-27 18:51:19,678 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 18:51:19,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:19,678 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 18:51:19,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:51:19,678 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:51:19,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:19,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1397728379, now seen corresponding path program 4 times [2024-06-27 18:51:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:19,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758138271] [2024-06-27 18:51:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:22,876 INFO 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 18:51:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:22,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758138271] [2024-06-27 18:51:22,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758138271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:22,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:22,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976902727] [2024-06-27 18:51:22,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:22,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:22,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:22,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:51:22,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 308 transitions, 4441 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 18:51:22,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:22,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:51:22,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:28,416 INFO L124 PetriNetUnfolderBase]: 14277/21328 cut-off events. [2024-06-27 18:51:28,417 INFO L125 PetriNetUnfolderBase]: For 507192/507197 co-relation queries the response was YES. [2024-06-27 18:51:28,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126983 conditions, 21328 events. 14277/21328 cut-off events. For 507192/507197 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 140663 event pairs, 4149 based on Foata normal form. 76/21400 useless extension candidates. Maximal degree in co-relation 126892. Up to 16338 conditions per place. [2024-06-27 18:51:28,644 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 271 selfloop transitions, 158 changer transitions 0/435 dead transitions. [2024-06-27 18:51:28,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 435 transitions, 6182 flow [2024-06-27 18:51:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:51:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:51:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 330 transitions. [2024-06-27 18:51:28,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-06-27 18:51:28,646 INFO L175 Difference]: Start difference. First operand has 190 places, 308 transitions, 4441 flow. Second operand 12 states and 330 transitions. [2024-06-27 18:51:28,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 435 transitions, 6182 flow [2024-06-27 18:51:29,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 435 transitions, 5986 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 18:51:29,931 INFO L231 Difference]: Finished difference. Result has 195 places, 311 transitions, 4707 flow [2024-06-27 18:51:29,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4245, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4707, PETRI_PLACES=195, PETRI_TRANSITIONS=311} [2024-06-27 18:51:29,932 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-06-27 18:51:29,932 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 311 transitions, 4707 flow [2024-06-27 18:51:29,932 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 18:51:29,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:29,933 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 18:51:29,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:51:29,933 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:51:29,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1397580509, now seen corresponding path program 5 times [2024-06-27 18:51:29,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:29,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805669037] [2024-06-27 18:51:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:29,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat