./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe020_rmo.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/safe020_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/safe020_rmo.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 19:04:19,039 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:04:19,079 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:04:19,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:04:19,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:04:19,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:04:19,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:04:19,099 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:04:19,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:04:19,099 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:04:19,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:04:19,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:04:19,100 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:04:19,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:04:19,101 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:04:19,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:04:19,101 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:04:19,102 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:04:19,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:04:19,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:04:19,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:04:19,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:04:19,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:04:19,103 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:04:19,104 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:04:19,104 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:04:19,104 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:04:19,104 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:04:19,105 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:04:19,105 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:04:19,105 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:04:19,105 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:04:19,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:04:19,106 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:04:19,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:04:19,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:04:19,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:04:19,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:04:19,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:04:19,107 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:04:19,107 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:04:19,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:04:19,107 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:04:19,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 19:04:19,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:04:19,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:04:19,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:04:19,286 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:04:19,286 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:04:19,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe020_rmo.yml/witness.yml [2024-06-27 19:04:19,504 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:04:19,505 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:04:19,505 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-27 19:04:20,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:04:20,788 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:04:20,789 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-27 19:04:20,805 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4a050e9/18927f1f25aa439c969197477df6d696/FLAGfc7fafc46 [2024-06-27 19:04:20,817 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4a050e9/18927f1f25aa439c969197477df6d696 [2024-06-27 19:04:20,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:04:20,818 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:04:20,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:04:20,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:04:20,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:04:20,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:04:19" (1/2) ... [2024-06-27 19:04:20,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa4e69d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:04:20, skipping insertion in model container [2024-06-27 19:04:20,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:04:19" (1/2) ... [2024-06-27 19:04:20,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a043f7f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:04:20, skipping insertion in model container [2024-06-27 19:04:20,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:04:20" (2/2) ... [2024-06-27 19:04:20,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa4e69d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:20, skipping insertion in model container [2024-06-27 19:04:20,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:04:20" (2/2) ... [2024-06-27 19:04:20,826 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:04:20,935 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:04:20,936 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-27 19:04:20,936 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-27 19:04:20,936 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-27 19:04:20,937 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:04:20,937 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-27 19:04:20,972 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:04:21,152 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/safe020_rmo.i[988,1001] [2024-06-27 19:04:21,329 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:04:21,341 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 19:04:21,371 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/safe020_rmo.i[988,1001] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:04:21,463 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:04:21,502 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:04:21,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21 WrapperNode [2024-06-27 19:04:21,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:04:21,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:04:21,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:04:21,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:04:21,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,576 INFO L138 Inliner]: procedures = 175, calls = 75, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 169 [2024-06-27 19:04:21,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:04:21,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:04:21,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:04:21,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:04:21,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,609 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,634 INFO L175 MemorySlicer]: Split 35 memory accesses to 2 slices as follows [2, 33]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-27 19:04:21,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,668 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:04:21,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:04:21,679 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:04:21,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:04:21,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (1/1) ... [2024-06-27 19:04:21,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:04:21,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:04:21,737 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 19:04:21,803 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 19:04:21,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 19:04:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 19:04:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 19:04:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 19:04:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:04:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:04:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:04:21,827 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:04:21,827 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:04:21,827 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:04:21,827 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:04:21,827 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:04:21,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:04:21,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 19:04:21,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:04:21,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:04:21,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:04:21,829 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 19:04:22,005 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:04:22,007 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:04:22,409 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:04:22,409 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:04:22,683 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:04:22,683 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:04:22,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:04:22 BoogieIcfgContainer [2024-06-27 19:04:22,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:04:22,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:04:22,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:04:22,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:04:22,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:04:19" (1/4) ... [2024-06-27 19:04:22,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca83f4c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:04:22, skipping insertion in model container [2024-06-27 19:04:22,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:04:20" (2/4) ... [2024-06-27 19:04:22,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca83f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:04:22, skipping insertion in model container [2024-06-27 19:04:22,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:04:21" (3/4) ... [2024-06-27 19:04:22,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca83f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:04:22, skipping insertion in model container [2024-06-27 19:04:22,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:04:22" (4/4) ... [2024-06-27 19:04:22,693 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_rmo.i [2024-06-27 19:04:22,708 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:04:22,708 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 19:04:22,708 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:04:22,802 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:04:22,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 19:04:22,861 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 19:04:22,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:04:22,866 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 61 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 19:04:22,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 19:04:22,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 19:04:22,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:04:22,891 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;@52141e66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:04:22,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 19:04:22,896 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:04:22,896 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 19:04:22,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:04:22,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:22,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:04:22,898 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 19:04:22,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:22,902 INFO L85 PathProgramCache]: Analyzing trace with hash 679458287, now seen corresponding path program 1 times [2024-06-27 19:04:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:22,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070312578] [2024-06-27 19:04:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:22,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:24,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:24,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070312578] [2024-06-27 19:04:24,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070312578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:24,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:24,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:04:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402897968] [2024-06-27 19:04:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:24,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:04:24,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:04:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:04:24,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:04:24,637 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 19:04:24,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:24,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:04:24,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:25,479 INFO L124 PetriNetUnfolderBase]: 3350/5180 cut-off events. [2024-06-27 19:04:25,479 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 19:04:25,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10095 conditions, 5180 events. 3350/5180 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29462 event pairs, 2161 based on Foata normal form. 0/4999 useless extension candidates. Maximal degree in co-relation 10083. Up to 4834 conditions per place. [2024-06-27 19:04:25,506 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 19:04:25,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 231 flow [2024-06-27 19:04:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:04:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:04:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-27 19:04:25,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-06-27 19:04:25,518 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 89 transitions. [2024-06-27 19:04:25,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 231 flow [2024-06-27 19:04:25,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:04:25,525 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 19:04:25,527 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 19:04:25,531 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 19:04:25,531 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 19:04:25,531 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 19:04:25,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:25,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:25,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:04:25,532 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 19:04:25,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:25,533 INFO L85 PathProgramCache]: Analyzing trace with hash 124433710, now seen corresponding path program 1 times [2024-06-27 19:04:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:25,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728569946] [2024-06-27 19:04:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:25,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:27,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:27,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728569946] [2024-06-27 19:04:27,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728569946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:27,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:27,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:04:27,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102234816] [2024-06-27 19:04:27,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:27,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:04:27,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:27,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:04:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:04:27,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:04:27,088 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 19:04:27,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:27,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:04:27,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:27,818 INFO L124 PetriNetUnfolderBase]: 3338/5162 cut-off events. [2024-06-27 19:04:27,818 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-06-27 19:04:27,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11219 conditions, 5162 events. 3338/5162 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29530 event pairs, 1485 based on Foata normal form. 6/5165 useless extension candidates. Maximal degree in co-relation 11207. Up to 4762 conditions per place. [2024-06-27 19:04:27,839 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 59 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-27 19:04:27,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 337 flow [2024-06-27 19:04:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:04:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:04:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-27 19:04:27,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-06-27 19:04:27,841 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 119 transitions. [2024-06-27 19:04:27,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 337 flow [2024-06-27 19:04:27,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 76 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:04:27,843 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 171 flow [2024-06-27 19:04:27,844 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 19:04:27,844 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2024-06-27 19:04:27,844 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 171 flow [2024-06-27 19:04:27,845 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 19:04:27,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:27,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:27,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:04:27,845 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 19:04:27,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1048268716, now seen corresponding path program 1 times [2024-06-27 19:04:27,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:27,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774948996] [2024-06-27 19:04:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:30,517 INFO 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 19:04:30,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774948996] [2024-06-27 19:04:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774948996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:30,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:30,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:04:30,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711968429] [2024-06-27 19:04:30,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:30,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:04:30,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:30,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:04:30,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:04:30,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:04:30,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 171 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:30,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:30,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:04:30,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:31,589 INFO L124 PetriNetUnfolderBase]: 3329/5147 cut-off events. [2024-06-27 19:04:31,589 INFO L125 PetriNetUnfolderBase]: For 2306/2306 co-relation queries the response was YES. [2024-06-27 19:04:31,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12327 conditions, 5147 events. 3329/5147 cut-off events. For 2306/2306 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29323 event pairs, 1086 based on Foata normal form. 6/5150 useless extension candidates. Maximal degree in co-relation 12313. Up to 4693 conditions per place. [2024-06-27 19:04:31,616 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 80 selfloop transitions, 16 changer transitions 0/104 dead transitions. [2024-06-27 19:04:31,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 104 transitions, 510 flow [2024-06-27 19:04:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:04:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:04:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 19:04:31,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-06-27 19:04:31,621 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 171 flow. Second operand 6 states and 171 transitions. [2024-06-27 19:04:31,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 104 transitions, 510 flow [2024-06-27 19:04:31,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 104 transitions, 482 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 19:04:31,626 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 231 flow [2024-06-27 19:04:31,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-27 19:04:31,627 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2024-06-27 19:04:31,628 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 231 flow [2024-06-27 19:04:31,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:31,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:31,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:31,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:04:31,629 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 19:04:31,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1680738719, now seen corresponding path program 1 times [2024-06-27 19:04:31,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498281138] [2024-06-27 19:04:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498281138] [2024-06-27 19:04:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498281138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:32,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:32,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:04:32,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383637280] [2024-06-27 19:04:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:04:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:04:32,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:04:32,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:32,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:32,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:32,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:32,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:33,981 INFO L124 PetriNetUnfolderBase]: 3319/5133 cut-off events. [2024-06-27 19:04:33,981 INFO L125 PetriNetUnfolderBase]: For 4456/4456 co-relation queries the response was YES. [2024-06-27 19:04:33,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13391 conditions, 5133 events. 3319/5133 cut-off events. For 4456/4456 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29225 event pairs, 1268 based on Foata normal form. 4/5134 useless extension candidates. Maximal degree in co-relation 13374. Up to 4749 conditions per place. [2024-06-27 19:04:34,004 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 65 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-27 19:04:34,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 455 flow [2024-06-27 19:04:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:04:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:04:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 19:04:34,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 19:04:34,006 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 231 flow. Second operand 5 states and 121 transitions. [2024-06-27 19:04:34,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 455 flow [2024-06-27 19:04:34,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 417 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:04:34,010 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 252 flow [2024-06-27 19:04:34,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=252, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-27 19:04:34,011 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-06-27 19:04:34,011 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 252 flow [2024-06-27 19:04:34,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:34,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:34,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:34,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:04:34,012 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 19:04:34,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash 881229102, now seen corresponding path program 1 times [2024-06-27 19:04:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:34,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850108660] [2024-06-27 19:04:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:34,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:35,602 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 19:04:35,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:35,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850108660] [2024-06-27 19:04:35,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850108660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:35,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:35,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:04:35,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264441774] [2024-06-27 19:04:35,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:35,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:04:35,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:04:35,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:04:35,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:35,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:35,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:35,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:35,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:37,103 INFO L124 PetriNetUnfolderBase]: 3371/5227 cut-off events. [2024-06-27 19:04:37,103 INFO L125 PetriNetUnfolderBase]: For 6535/6538 co-relation queries the response was YES. [2024-06-27 19:04:37,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14623 conditions, 5227 events. 3371/5227 cut-off events. For 6535/6538 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 29861 event pairs, 1182 based on Foata normal form. 6/5228 useless extension candidates. Maximal degree in co-relation 14604. Up to 4702 conditions per place. [2024-06-27 19:04:37,130 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 79 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-27 19:04:37,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 107 transitions, 614 flow [2024-06-27 19:04:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:04:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:04:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:04:37,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549645390070922 [2024-06-27 19:04:37,135 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 252 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:04:37,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 107 transitions, 614 flow [2024-06-27 19:04:37,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 107 transitions, 585 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 19:04:37,146 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 338 flow [2024-06-27 19:04:37,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-27 19:04:37,148 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-06-27 19:04:37,149 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 338 flow [2024-06-27 19:04:37,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:37,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:37,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:37,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:04:37,149 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 19:04:37,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:37,150 INFO L85 PathProgramCache]: Analyzing trace with hash 920905692, now seen corresponding path program 2 times [2024-06-27 19:04:37,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:37,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456766514] [2024-06-27 19:04:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:37,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:38,766 INFO 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 19:04:38,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:38,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456766514] [2024-06-27 19:04:38,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456766514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:38,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:38,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:04:38,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349346176] [2024-06-27 19:04:38,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:38,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:04:38,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:38,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:04:38,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:04:38,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:38,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:38,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:38,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:38,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:40,080 INFO L124 PetriNetUnfolderBase]: 3361/5200 cut-off events. [2024-06-27 19:04:40,080 INFO L125 PetriNetUnfolderBase]: For 9132/9132 co-relation queries the response was YES. [2024-06-27 19:04:40,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15644 conditions, 5200 events. 3361/5200 cut-off events. For 9132/9132 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 29649 event pairs, 1177 based on Foata normal form. 4/5198 useless extension candidates. Maximal degree in co-relation 15624. Up to 4694 conditions per place. [2024-06-27 19:04:40,109 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 72 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-27 19:04:40,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 598 flow [2024-06-27 19:04:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:04:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:04:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:04:40,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 19:04:40,111 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 338 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:04:40,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 598 flow [2024-06-27 19:04:40,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 100 transitions, 552 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 19:04:40,124 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 343 flow [2024-06-27 19:04:40,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-27 19:04:40,127 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-27 19:04:40,127 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 343 flow [2024-06-27 19:04:40,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:40,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:40,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:40,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:04:40,128 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 19:04:40,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -282161280, now seen corresponding path program 1 times [2024-06-27 19:04:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:40,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783309002] [2024-06-27 19:04:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:42,720 INFO 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 19:04:42,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:42,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783309002] [2024-06-27 19:04:42,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783309002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:42,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:42,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:04:42,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999777372] [2024-06-27 19:04:42,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:42,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:04:42,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:42,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:04:42,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:04:42,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:42,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 343 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:42,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:42,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:42,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:44,021 INFO L124 PetriNetUnfolderBase]: 3353/5199 cut-off events. [2024-06-27 19:04:44,022 INFO L125 PetriNetUnfolderBase]: For 9461/9461 co-relation queries the response was YES. [2024-06-27 19:04:44,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15575 conditions, 5199 events. 3353/5199 cut-off events. For 9461/9461 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 29644 event pairs, 1156 based on Foata normal form. 4/5200 useless extension candidates. Maximal degree in co-relation 15553. Up to 4757 conditions per place. [2024-06-27 19:04:44,043 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 83 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-06-27 19:04:44,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 639 flow [2024-06-27 19:04:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:04:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:04:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:04:44,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 19:04:44,057 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 343 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:04:44,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 639 flow [2024-06-27 19:04:44,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 103 transitions, 581 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:44,063 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 355 flow [2024-06-27 19:04:44,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-27 19:04:44,063 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-27 19:04:44,063 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 355 flow [2024-06-27 19:04:44,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:44,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:44,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:44,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:04:44,064 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 19:04:44,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1391651005, now seen corresponding path program 1 times [2024-06-27 19:04:44,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:44,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811345965] [2024-06-27 19:04:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:44,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:46,713 INFO 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 19:04:46,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:46,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811345965] [2024-06-27 19:04:46,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811345965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:46,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:46,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:04:46,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187359046] [2024-06-27 19:04:46,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:46,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:04:46,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:04:46,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:04:46,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:46,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 355 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:46,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:46,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:46,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:48,122 INFO L124 PetriNetUnfolderBase]: 3405/5291 cut-off events. [2024-06-27 19:04:48,122 INFO L125 PetriNetUnfolderBase]: For 12500/12500 co-relation queries the response was YES. [2024-06-27 19:04:48,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16426 conditions, 5291 events. 3405/5291 cut-off events. For 12500/12500 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 30330 event pairs, 1241 based on Foata normal form. 4/5292 useless extension candidates. Maximal degree in co-relation 16404. Up to 4813 conditions per place. [2024-06-27 19:04:48,150 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 98 selfloop transitions, 18 changer transitions 0/123 dead transitions. [2024-06-27 19:04:48,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 123 transitions, 737 flow [2024-06-27 19:04:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:04:48,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-27 19:04:48,152 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 355 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:04:48,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 123 transitions, 737 flow [2024-06-27 19:04:48,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 123 transitions, 691 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:04:48,162 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 400 flow [2024-06-27 19:04:48,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=400, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-27 19:04:48,162 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2024-06-27 19:04:48,162 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 400 flow [2024-06-27 19:04:48,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:48,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:48,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:48,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:04:48,163 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 19:04:48,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1596443521, now seen corresponding path program 2 times [2024-06-27 19:04:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:48,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032862528] [2024-06-27 19:04:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:50,543 INFO 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 19:04:50,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:50,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032862528] [2024-06-27 19:04:50,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032862528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:50,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:50,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:04:50,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530840158] [2024-06-27 19:04:50,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:50,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:04:50,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:04:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:04:50,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:50,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 400 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:50,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:50,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:50,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:51,998 INFO L124 PetriNetUnfolderBase]: 3457/5385 cut-off events. [2024-06-27 19:04:51,999 INFO L125 PetriNetUnfolderBase]: For 16435/16441 co-relation queries the response was YES. [2024-06-27 19:04:52,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17731 conditions, 5385 events. 3457/5385 cut-off events. For 16435/16441 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 30944 event pairs, 1076 based on Foata normal form. 8/5388 useless extension candidates. Maximal degree in co-relation 17708. Up to 4659 conditions per place. [2024-06-27 19:04:52,035 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 90 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-27 19:04:52,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 132 transitions, 886 flow [2024-06-27 19:04:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:04:52,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 19:04:52,037 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 400 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:04:52,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 132 transitions, 886 flow [2024-06-27 19:04:52,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 132 transitions, 825 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:52,049 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 518 flow [2024-06-27 19:04:52,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-27 19:04:52,050 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2024-06-27 19:04:52,050 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 518 flow [2024-06-27 19:04:52,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:52,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:52,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:52,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:04:52,051 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 19:04:52,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1386882461, now seen corresponding path program 1 times [2024-06-27 19:04:52,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:52,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661115196] [2024-06-27 19:04:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:54,568 INFO 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 19:04:54,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:54,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661115196] [2024-06-27 19:04:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661115196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:54,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:54,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173935202] [2024-06-27 19:04:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:54,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:54,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:54,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:54,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:54,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 518 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:04:54,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:54,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:54,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:55,970 INFO L124 PetriNetUnfolderBase]: 3499/5447 cut-off events. [2024-06-27 19:04:55,971 INFO L125 PetriNetUnfolderBase]: For 21425/21431 co-relation queries the response was YES. [2024-06-27 19:04:55,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19048 conditions, 5447 events. 3499/5447 cut-off events. For 21425/21431 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 31357 event pairs, 1110 based on Foata normal form. 8/5450 useless extension candidates. Maximal degree in co-relation 19024. Up to 4850 conditions per place. [2024-06-27 19:04:55,999 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 102 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-27 19:04:55,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 918 flow [2024-06-27 19:04:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:56,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:04:56,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-27 19:04:56,005 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 518 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:04:56,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 918 flow [2024-06-27 19:04:56,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 860 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 19:04:56,030 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 562 flow [2024-06-27 19:04:56,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-27 19:04:56,031 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 25 predicate places. [2024-06-27 19:04:56,032 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 562 flow [2024-06-27 19:04:56,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:04:56,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:56,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:56,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:04:56,032 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 19:04:56,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash -742552575, now seen corresponding path program 3 times [2024-06-27 19:04:56,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:56,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425305740] [2024-06-27 19:04:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:58,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:58,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425305740] [2024-06-27 19:04:58,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425305740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:58,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:58,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:04:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599065210] [2024-06-27 19:04:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:04:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:04:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:04:58,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:58,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 562 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:58,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:58,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:58,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:59,658 INFO L124 PetriNetUnfolderBase]: 3489/5409 cut-off events. [2024-06-27 19:04:59,659 INFO L125 PetriNetUnfolderBase]: For 24771/24771 co-relation queries the response was YES. [2024-06-27 19:04:59,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19669 conditions, 5409 events. 3489/5409 cut-off events. For 24771/24771 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31102 event pairs, 1088 based on Foata normal form. 4/5404 useless extension candidates. Maximal degree in co-relation 19643. Up to 4713 conditions per place. [2024-06-27 19:04:59,686 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 86 selfloop transitions, 35 changer transitions 0/128 dead transitions. [2024-06-27 19:04:59,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 128 transitions, 900 flow [2024-06-27 19:04:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:04:59,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:04:59,688 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 562 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:04:59,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 128 transitions, 900 flow [2024-06-27 19:04:59,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 796 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:59,705 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 537 flow [2024-06-27 19:04:59,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=537, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-27 19:04:59,706 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2024-06-27 19:04:59,706 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 537 flow [2024-06-27 19:04:59,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:59,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:59,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:59,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:04:59,707 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 19:04:59,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:59,707 INFO L85 PathProgramCache]: Analyzing trace with hash -582355217, now seen corresponding path program 2 times [2024-06-27 19:04:59,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:59,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320820587] [2024-06-27 19:04:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:59,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:02,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:02,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320820587] [2024-06-27 19:05:02,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320820587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:02,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:02,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:02,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596542409] [2024-06-27 19:05:02,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:02,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:02,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:02,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 537 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:02,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:02,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:02,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:03,827 INFO L124 PetriNetUnfolderBase]: 3531/5492 cut-off events. [2024-06-27 19:05:03,828 INFO L125 PetriNetUnfolderBase]: For 26392/26392 co-relation queries the response was YES. [2024-06-27 19:05:03,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20037 conditions, 5492 events. 3531/5492 cut-off events. For 26392/26392 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 31528 event pairs, 1122 based on Foata normal form. 4/5490 useless extension candidates. Maximal degree in co-relation 20010. Up to 4898 conditions per place. [2024-06-27 19:05:03,856 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 100 selfloop transitions, 24 changer transitions 0/131 dead transitions. [2024-06-27 19:05:03,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 927 flow [2024-06-27 19:05:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:05:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:05:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:05:03,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:05:03,858 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 537 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:05:03,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 927 flow [2024-06-27 19:05:03,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 131 transitions, 834 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:03,876 INFO L231 Difference]: Finished difference. Result has 79 places, 88 transitions, 552 flow [2024-06-27 19:05:03,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=79, PETRI_TRANSITIONS=88} [2024-06-27 19:05:03,877 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2024-06-27 19:05:03,877 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 88 transitions, 552 flow [2024-06-27 19:05:03,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:03,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:03,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:03,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:05:03,878 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 19:05:03,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:03,878 INFO L85 PathProgramCache]: Analyzing trace with hash -574014977, now seen corresponding path program 3 times [2024-06-27 19:05:03,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:03,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509744808] [2024-06-27 19:05:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:03,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:06,466 INFO 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 19:05:06,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:06,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509744808] [2024-06-27 19:05:06,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509744808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:06,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:06,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:06,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418079846] [2024-06-27 19:05:06,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:06,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:06,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:06,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:06,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 88 transitions, 552 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:06,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:06,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:06,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:07,821 INFO L124 PetriNetUnfolderBase]: 3523/5480 cut-off events. [2024-06-27 19:05:07,821 INFO L125 PetriNetUnfolderBase]: For 30360/30360 co-relation queries the response was YES. [2024-06-27 19:05:07,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20480 conditions, 5480 events. 3523/5480 cut-off events. For 30360/30360 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 31601 event pairs, 1026 based on Foata normal form. 4/5478 useless extension candidates. Maximal degree in co-relation 20452. Up to 4762 conditions per place. [2024-06-27 19:05:07,848 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 95 selfloop transitions, 32 changer transitions 0/134 dead transitions. [2024-06-27 19:05:07,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 134 transitions, 954 flow [2024-06-27 19:05:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:05:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:05:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:05:07,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:05:07,850 INFO L175 Difference]: Start difference. First operand has 79 places, 88 transitions, 552 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:05:07,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 134 transitions, 954 flow [2024-06-27 19:05:07,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 134 transitions, 870 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:05:07,870 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 598 flow [2024-06-27 19:05:07,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=598, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-27 19:05:07,871 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-27 19:05:07,871 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 598 flow [2024-06-27 19:05:07,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:07,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:07,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:05:07,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:07,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1561996505, now seen corresponding path program 1 times [2024-06-27 19:05:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:07,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120963845] [2024-06-27 19:05:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:09,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:09,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120963845] [2024-06-27 19:05:09,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120963845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:09,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:09,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:05:09,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411725789] [2024-06-27 19:05:09,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:09,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:05:09,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:09,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:05:09,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:05:09,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:09,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 598 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:09,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:09,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:09,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:10,520 INFO L124 PetriNetUnfolderBase]: 3520/5467 cut-off events. [2024-06-27 19:05:10,520 INFO L125 PetriNetUnfolderBase]: For 34485/34485 co-relation queries the response was YES. [2024-06-27 19:05:10,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21040 conditions, 5467 events. 3520/5467 cut-off events. For 34485/34485 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 31328 event pairs, 1225 based on Foata normal form. 1/5465 useless extension candidates. Maximal degree in co-relation 21011. Up to 5054 conditions per place. [2024-06-27 19:05:10,547 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 100 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-27 19:05:10,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 946 flow [2024-06-27 19:05:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:05:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:05:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 19:05:10,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978723404255319 [2024-06-27 19:05:10,551 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 598 flow. Second operand 5 states and 117 transitions. [2024-06-27 19:05:10,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 946 flow [2024-06-27 19:05:10,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 118 transitions, 840 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:05:10,572 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 594 flow [2024-06-27 19:05:10,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=594, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-27 19:05:10,573 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 31 predicate places. [2024-06-27 19:05:10,573 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 594 flow [2024-06-27 19:05:10,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:10,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:10,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:10,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:05:10,581 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:10,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:10,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1137031648, now seen corresponding path program 1 times [2024-06-27 19:05:10,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:10,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173884647] [2024-06-27 19:05:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:10,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:12,757 INFO 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 19:05:12,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:12,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173884647] [2024-06-27 19:05:12,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173884647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:12,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:12,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:05:12,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099574779] [2024-06-27 19:05:12,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:12,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:05:12,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:05:12,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:05:12,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:12,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 594 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 19:05:12,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:12,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:12,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:14,052 INFO L124 PetriNetUnfolderBase]: 3614/5593 cut-off events. [2024-06-27 19:05:14,052 INFO L125 PetriNetUnfolderBase]: For 38269/38269 co-relation queries the response was YES. [2024-06-27 19:05:14,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22126 conditions, 5593 events. 3614/5593 cut-off events. For 38269/38269 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31989 event pairs, 1235 based on Foata normal form. 6/5590 useless extension candidates. Maximal degree in co-relation 22095. Up to 4875 conditions per place. [2024-06-27 19:05:14,084 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 111 selfloop transitions, 24 changer transitions 0/142 dead transitions. [2024-06-27 19:05:14,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 142 transitions, 1130 flow [2024-06-27 19:05:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:05:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:05:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:05:14,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 19:05:14,086 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 594 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:05:14,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 142 transitions, 1130 flow [2024-06-27 19:05:14,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1104 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 19:05:14,121 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 759 flow [2024-06-27 19:05:14,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=759, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-27 19:05:14,122 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 38 predicate places. [2024-06-27 19:05:14,122 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 759 flow [2024-06-27 19:05:14,122 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 19:05:14,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:14,123 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 19:05:14,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:05:14,123 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 19:05:14,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash 988209250, now seen corresponding path program 1 times [2024-06-27 19:05:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:14,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550933872] [2024-06-27 19:05:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:15,661 INFO 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 19:05:15,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550933872] [2024-06-27 19:05:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550933872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:15,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394719570] [2024-06-27 19:05:15,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:15,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:15,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:15,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 759 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:15,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:15,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:15,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:17,399 INFO L124 PetriNetUnfolderBase]: 4112/6293 cut-off events. [2024-06-27 19:05:17,399 INFO L125 PetriNetUnfolderBase]: For 57127/57127 co-relation queries the response was YES. [2024-06-27 19:05:17,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28013 conditions, 6293 events. 4112/6293 cut-off events. For 57127/57127 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 36458 event pairs, 1310 based on Foata normal form. 16/6306 useless extension candidates. Maximal degree in co-relation 27977. Up to 5278 conditions per place. [2024-06-27 19:05:17,437 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 179 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-06-27 19:05:17,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 224 transitions, 1670 flow [2024-06-27 19:05:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:05:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:05:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 286 transitions. [2024-06-27 19:05:17,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 19:05:17,439 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 759 flow. Second operand 11 states and 286 transitions. [2024-06-27 19:05:17,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 224 transitions, 1670 flow [2024-06-27 19:05:17,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 224 transitions, 1646 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 19:05:17,479 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1040 flow [2024-06-27 19:05:17,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1040, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-06-27 19:05:17,480 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2024-06-27 19:05:17,480 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1040 flow [2024-06-27 19:05:17,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:17,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:17,480 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 19:05:17,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:05:17,481 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 19:05:17,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:17,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1644604286, now seen corresponding path program 2 times [2024-06-27 19:05:17,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:17,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640880624] [2024-06-27 19:05:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:17,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:20,395 INFO 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 19:05:20,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640880624] [2024-06-27 19:05:20,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640880624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:20,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:20,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:20,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124280194] [2024-06-27 19:05:20,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:20,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:20,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:20,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:20,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:20,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:20,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1040 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:20,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:20,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:20,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:22,372 INFO L124 PetriNetUnfolderBase]: 4486/6947 cut-off events. [2024-06-27 19:05:22,372 INFO L125 PetriNetUnfolderBase]: For 75359/75359 co-relation queries the response was YES. [2024-06-27 19:05:22,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32925 conditions, 6947 events. 4486/6947 cut-off events. For 75359/75359 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 40992 event pairs, 1055 based on Foata normal form. 16/6960 useless extension candidates. Maximal degree in co-relation 32883. Up to 5310 conditions per place. [2024-06-27 19:05:22,425 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 162 selfloop transitions, 40 changer transitions 0/209 dead transitions. [2024-06-27 19:05:22,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 209 transitions, 1860 flow [2024-06-27 19:05:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:05:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:05:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 19:05:22,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508274231678487 [2024-06-27 19:05:22,428 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1040 flow. Second operand 9 states and 233 transitions. [2024-06-27 19:05:22,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 209 transitions, 1860 flow [2024-06-27 19:05:22,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 209 transitions, 1797 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:05:22,512 INFO L231 Difference]: Finished difference. Result has 106 places, 132 transitions, 1179 flow [2024-06-27 19:05:22,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1179, PETRI_PLACES=106, PETRI_TRANSITIONS=132} [2024-06-27 19:05:22,513 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2024-06-27 19:05:22,513 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 132 transitions, 1179 flow [2024-06-27 19:05:22,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:22,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:22,513 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 19:05:22,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:05:22,513 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 19:05:22,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1641747326, now seen corresponding path program 3 times [2024-06-27 19:05:22,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:22,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854198272] [2024-06-27 19:05:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:22,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:25,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:25,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854198272] [2024-06-27 19:05:25,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854198272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:25,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:25,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:25,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180794294] [2024-06-27 19:05:25,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:25,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:25,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:25,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:25,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 132 transitions, 1179 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:25,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:25,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:25,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:27,035 INFO L124 PetriNetUnfolderBase]: 4414/6837 cut-off events. [2024-06-27 19:05:27,035 INFO L125 PetriNetUnfolderBase]: For 76001/76001 co-relation queries the response was YES. [2024-06-27 19:05:27,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32260 conditions, 6837 events. 4414/6837 cut-off events. For 76001/76001 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 40167 event pairs, 1439 based on Foata normal form. 40/6874 useless extension candidates. Maximal degree in co-relation 32216. Up to 5774 conditions per place. [2024-06-27 19:05:27,081 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 157 selfloop transitions, 30 changer transitions 0/194 dead transitions. [2024-06-27 19:05:27,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 194 transitions, 1753 flow [2024-06-27 19:05:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:05:27,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 19:05:27,084 INFO L175 Difference]: Start difference. First operand has 106 places, 132 transitions, 1179 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:05:27,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 194 transitions, 1753 flow [2024-06-27 19:05:27,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 194 transitions, 1639 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:27,212 INFO L231 Difference]: Finished difference. Result has 108 places, 132 transitions, 1137 flow [2024-06-27 19:05:27,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1137, PETRI_PLACES=108, PETRI_TRANSITIONS=132} [2024-06-27 19:05:27,212 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-27 19:05:27,212 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 132 transitions, 1137 flow [2024-06-27 19:05:27,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:27,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:27,213 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 19:05:27,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:05:27,213 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 19:05:27,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:27,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1044577566, now seen corresponding path program 4 times [2024-06-27 19:05:27,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:27,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467155812] [2024-06-27 19:05:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:27,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:29,404 INFO 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 19:05:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467155812] [2024-06-27 19:05:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467155812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:29,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667950559] [2024-06-27 19:05:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:29,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:29,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:29,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 132 transitions, 1137 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:29,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:29,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:29,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:31,389 INFO L124 PetriNetUnfolderBase]: 4604/7167 cut-off events. [2024-06-27 19:05:31,389 INFO L125 PetriNetUnfolderBase]: For 67535/67541 co-relation queries the response was YES. [2024-06-27 19:05:31,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32934 conditions, 7167 events. 4604/7167 cut-off events. For 67535/67541 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 42417 event pairs, 1231 based on Foata normal form. 24/7186 useless extension candidates. Maximal degree in co-relation 32889. Up to 6094 conditions per place. [2024-06-27 19:05:31,432 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 144 selfloop transitions, 45 changer transitions 0/196 dead transitions. [2024-06-27 19:05:31,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 196 transitions, 1767 flow [2024-06-27 19:05:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:05:31,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 19:05:31,435 INFO L175 Difference]: Start difference. First operand has 108 places, 132 transitions, 1137 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:05:31,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 196 transitions, 1767 flow [2024-06-27 19:05:31,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 196 transitions, 1691 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:05:31,491 INFO L231 Difference]: Finished difference. Result has 109 places, 134 transitions, 1217 flow [2024-06-27 19:05:31,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1217, PETRI_PLACES=109, PETRI_TRANSITIONS=134} [2024-06-27 19:05:31,492 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 58 predicate places. [2024-06-27 19:05:31,493 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 134 transitions, 1217 flow [2024-06-27 19:05:31,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:31,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:31,493 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 19:05:31,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:05:31,493 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 19:05:31,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1051248766, now seen corresponding path program 1 times [2024-06-27 19:05:31,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:31,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981054302] [2024-06-27 19:05:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:31,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:34,728 INFO 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 19:05:34,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:34,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981054302] [2024-06-27 19:05:34,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981054302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:34,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:34,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:34,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735493049] [2024-06-27 19:05:34,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:34,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:34,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:34,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 134 transitions, 1217 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 19:05:34,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:34,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:34,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:36,889 INFO L124 PetriNetUnfolderBase]: 4710/7323 cut-off events. [2024-06-27 19:05:36,889 INFO L125 PetriNetUnfolderBase]: For 74910/74916 co-relation queries the response was YES. [2024-06-27 19:05:36,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34360 conditions, 7323 events. 4710/7323 cut-off events. For 74910/74916 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 43632 event pairs, 1189 based on Foata normal form. 16/7334 useless extension candidates. Maximal degree in co-relation 34314. Up to 5578 conditions per place. [2024-06-27 19:05:36,933 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 140 selfloop transitions, 53 changer transitions 0/200 dead transitions. [2024-06-27 19:05:36,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 200 transitions, 1871 flow [2024-06-27 19:05:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:05:36,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 19:05:36,936 INFO L175 Difference]: Start difference. First operand has 109 places, 134 transitions, 1217 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:05:36,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 200 transitions, 1871 flow [2024-06-27 19:05:37,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 200 transitions, 1755 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:37,026 INFO L231 Difference]: Finished difference. Result has 111 places, 136 transitions, 1276 flow [2024-06-27 19:05:37,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1276, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2024-06-27 19:05:37,027 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-27 19:05:37,027 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 1276 flow [2024-06-27 19:05:37,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 19:05:37,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:37,028 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 19:05:37,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:05:37,028 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:37,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash 866554790, now seen corresponding path program 1 times [2024-06-27 19:05:37,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:37,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037564026] [2024-06-27 19:05:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:37,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:38,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:38,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037564026] [2024-06-27 19:05:38,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037564026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:38,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:38,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:05:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907709990] [2024-06-27 19:05:38,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:38,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:05:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:05:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:05:38,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:38,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 1276 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 19:05:38,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:38,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:38,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:40,594 INFO L124 PetriNetUnfolderBase]: 4756/7391 cut-off events. [2024-06-27 19:05:40,595 INFO L125 PetriNetUnfolderBase]: For 76739/76739 co-relation queries the response was YES. [2024-06-27 19:05:40,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34852 conditions, 7391 events. 4756/7391 cut-off events. For 76739/76739 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 44142 event pairs, 1513 based on Foata normal form. 2/7390 useless extension candidates. Maximal degree in co-relation 34805. Up to 6553 conditions per place. [2024-06-27 19:05:40,637 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 145 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2024-06-27 19:05:40,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 182 transitions, 1922 flow [2024-06-27 19:05:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:05:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:05:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:05:40,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-27 19:05:40,639 INFO L175 Difference]: Start difference. First operand has 111 places, 136 transitions, 1276 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:05:40,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 182 transitions, 1922 flow [2024-06-27 19:05:40,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 182 transitions, 1777 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:40,709 INFO L231 Difference]: Finished difference. Result has 111 places, 139 transitions, 1232 flow [2024-06-27 19:05:40,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1232, PETRI_PLACES=111, PETRI_TRANSITIONS=139} [2024-06-27 19:05:40,709 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-27 19:05:40,710 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 139 transitions, 1232 flow [2024-06-27 19:05:40,710 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 19:05:40,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:40,710 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 19:05:40,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:05:40,710 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 19:05:40,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1525893858, now seen corresponding path program 5 times [2024-06-27 19:05:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:40,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938670590] [2024-06-27 19:05:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:43,413 INFO 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 19:05:43,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938670590] [2024-06-27 19:05:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938670590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:43,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:43,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009319819] [2024-06-27 19:05:43,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:43,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:43,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:43,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:43,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 139 transitions, 1232 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:43,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:43,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:43,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:45,529 INFO L124 PetriNetUnfolderBase]: 4846/7563 cut-off events. [2024-06-27 19:05:45,530 INFO L125 PetriNetUnfolderBase]: For 79970/79970 co-relation queries the response was YES. [2024-06-27 19:05:45,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35164 conditions, 7563 events. 4846/7563 cut-off events. For 79970/79970 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 45542 event pairs, 1266 based on Foata normal form. 20/7572 useless extension candidates. Maximal degree in co-relation 35116. Up to 6464 conditions per place. [2024-06-27 19:05:45,580 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 146 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2024-06-27 19:05:45,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 198 transitions, 1860 flow [2024-06-27 19:05:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:05:45,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-27 19:05:45,582 INFO L175 Difference]: Start difference. First operand has 111 places, 139 transitions, 1232 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:05:45,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 198 transitions, 1860 flow [2024-06-27 19:05:45,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 198 transitions, 1809 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:05:45,664 INFO L231 Difference]: Finished difference. Result has 115 places, 141 transitions, 1345 flow [2024-06-27 19:05:45,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=115, PETRI_TRANSITIONS=141} [2024-06-27 19:05:45,664 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-27 19:05:45,664 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 141 transitions, 1345 flow [2024-06-27 19:05:45,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 19:05:45,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:45,665 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 19:05:45,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:05:45,665 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 19:05:45,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2137325856, now seen corresponding path program 2 times [2024-06-27 19:05:45,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:45,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533563348] [2024-06-27 19:05:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:45,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:48,532 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 19:05:48,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:48,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533563348] [2024-06-27 19:05:48,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533563348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:48,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:48,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:48,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227381076] [2024-06-27 19:05:48,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:48,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:48,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:48,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:48,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:48,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 141 transitions, 1345 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 19:05:48,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:48,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:48,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:50,773 INFO L124 PetriNetUnfolderBase]: 4952/7727 cut-off events. [2024-06-27 19:05:50,774 INFO L125 PetriNetUnfolderBase]: For 91301/91301 co-relation queries the response was YES. [2024-06-27 19:05:50,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36690 conditions, 7727 events. 4952/7727 cut-off events. For 91301/91301 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 46733 event pairs, 1266 based on Foata normal form. 12/7728 useless extension candidates. Maximal degree in co-relation 36642. Up to 6448 conditions per place. [2024-06-27 19:05:50,821 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 146 selfloop transitions, 49 changer transitions 0/202 dead transitions. [2024-06-27 19:05:50,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 202 transitions, 1997 flow [2024-06-27 19:05:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:05:50,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 19:05:50,823 INFO L175 Difference]: Start difference. First operand has 115 places, 141 transitions, 1345 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:05:50,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 202 transitions, 1997 flow [2024-06-27 19:05:50,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 202 transitions, 1873 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:50,911 INFO L231 Difference]: Finished difference. Result has 117 places, 143 transitions, 1396 flow [2024-06-27 19:05:50,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1396, PETRI_PLACES=117, PETRI_TRANSITIONS=143} [2024-06-27 19:05:50,912 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-27 19:05:50,912 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 143 transitions, 1396 flow [2024-06-27 19:05:50,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 19:05:50,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:50,913 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 19:05:50,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:05:50,913 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 19:05:50,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1872541570, now seen corresponding path program 3 times [2024-06-27 19:05:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:50,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539855019] [2024-06-27 19:05:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:50,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:53,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:53,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539855019] [2024-06-27 19:05:53,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539855019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:53,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:53,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155902326] [2024-06-27 19:05:53,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:53,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:53,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:53,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:53,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:53,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:53,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 143 transitions, 1396 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 19:05:53,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:53,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:53,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:55,674 INFO L124 PetriNetUnfolderBase]: 4932/7695 cut-off events. [2024-06-27 19:05:55,674 INFO L125 PetriNetUnfolderBase]: For 88552/88552 co-relation queries the response was YES. [2024-06-27 19:05:55,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36058 conditions, 7695 events. 4932/7695 cut-off events. For 88552/88552 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 46542 event pairs, 1121 based on Foata normal form. 12/7696 useless extension candidates. Maximal degree in co-relation 36009. Up to 5254 conditions per place. [2024-06-27 19:05:55,741 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 131 selfloop transitions, 65 changer transitions 0/203 dead transitions. [2024-06-27 19:05:55,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 203 transitions, 2014 flow [2024-06-27 19:05:55,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:05:55,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-27 19:05:55,743 INFO L175 Difference]: Start difference. First operand has 117 places, 143 transitions, 1396 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:05:55,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 203 transitions, 2014 flow [2024-06-27 19:05:55,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 203 transitions, 1869 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:55,878 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1420 flow [2024-06-27 19:05:55,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1420, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-27 19:05:55,879 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-06-27 19:05:55,879 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1420 flow [2024-06-27 19:05:55,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 19:05:55,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:55,879 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 19:05:55,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:05:55,879 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:55,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2135008026, now seen corresponding path program 2 times [2024-06-27 19:05:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:55,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684137756] [2024-06-27 19:05:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:55,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:57,794 INFO 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 19:05:57,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:57,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684137756] [2024-06-27 19:05:57,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684137756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:57,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:57,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:05:57,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809766666] [2024-06-27 19:05:57,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:57,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:05:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:05:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:05:57,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:57,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1420 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 19:05:57,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:57,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:57,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:59,530 INFO L124 PetriNetUnfolderBase]: 4906/7651 cut-off events. [2024-06-27 19:05:59,531 INFO L125 PetriNetUnfolderBase]: For 89663/89663 co-relation queries the response was YES. [2024-06-27 19:05:59,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35887 conditions, 7651 events. 4906/7651 cut-off events. For 89663/89663 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 46228 event pairs, 1509 based on Foata normal form. 6/7646 useless extension candidates. Maximal degree in co-relation 35837. Up to 6810 conditions per place. [2024-06-27 19:05:59,591 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 141 selfloop transitions, 29 changer transitions 0/177 dead transitions. [2024-06-27 19:05:59,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 177 transitions, 1940 flow [2024-06-27 19:05:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:05:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:05:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:05:59,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-27 19:05:59,593 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1420 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:05:59,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 177 transitions, 1940 flow [2024-06-27 19:05:59,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 177 transitions, 1757 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:59,703 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1303 flow [2024-06-27 19:05:59,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1303, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-27 19:05:59,704 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-06-27 19:05:59,704 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1303 flow [2024-06-27 19:05:59,704 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 19:05:59,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:59,704 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 19:05:59,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:05:59,705 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:59,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:59,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2139762682, now seen corresponding path program 1 times [2024-06-27 19:05:59,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:59,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564175593] [2024-06-27 19:05:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:59,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:01,462 INFO 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 19:06:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564175593] [2024-06-27 19:06:01,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564175593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:01,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:01,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:06:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567432018] [2024-06-27 19:06:01,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:01,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:06:01,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:06:01,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:06:01,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:01,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1303 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 19:06:01,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:01,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:01,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:03,115 INFO L124 PetriNetUnfolderBase]: 4952/7721 cut-off events. [2024-06-27 19:06:03,116 INFO L125 PetriNetUnfolderBase]: For 84821/84821 co-relation queries the response was YES. [2024-06-27 19:06:03,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35352 conditions, 7721 events. 4952/7721 cut-off events. For 84821/84821 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 46599 event pairs, 1537 based on Foata normal form. 2/7720 useless extension candidates. Maximal degree in co-relation 35301. Up to 7101 conditions per place. [2024-06-27 19:06:03,175 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 161 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2024-06-27 19:06:03,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 2007 flow [2024-06-27 19:06:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:06:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:06:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:06:03,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-27 19:06:03,178 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1303 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:06:03,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 2007 flow [2024-06-27 19:06:03,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 187 transitions, 1939 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:06:03,313 INFO L231 Difference]: Finished difference. Result has 120 places, 151 transitions, 1392 flow [2024-06-27 19:06:03,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1392, PETRI_PLACES=120, PETRI_TRANSITIONS=151} [2024-06-27 19:06:03,314 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 69 predicate places. [2024-06-27 19:06:03,314 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 151 transitions, 1392 flow [2024-06-27 19:06:03,314 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 19:06:03,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:03,314 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 19:06:03,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:06:03,315 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:03,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash -847136152, now seen corresponding path program 2 times [2024-06-27 19:06:03,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:03,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464656868] [2024-06-27 19:06:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:05,247 INFO 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 19:06:05,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:05,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464656868] [2024-06-27 19:06:05,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464656868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:05,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:05,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:06:05,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871851910] [2024-06-27 19:06:05,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:05,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:06:05,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:06:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:06:05,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:05,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 151 transitions, 1392 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 19:06:05,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:05,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:05,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:06,784 INFO L124 PetriNetUnfolderBase]: 4956/7771 cut-off events. [2024-06-27 19:06:06,785 INFO L125 PetriNetUnfolderBase]: For 89179/89179 co-relation queries the response was YES. [2024-06-27 19:06:06,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36204 conditions, 7771 events. 4956/7771 cut-off events. For 89179/89179 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 47340 event pairs, 1628 based on Foata normal form. 2/7770 useless extension candidates. Maximal degree in co-relation 36151. Up to 7196 conditions per place. [2024-06-27 19:06:06,846 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 161 selfloop transitions, 15 changer transitions 0/183 dead transitions. [2024-06-27 19:06:06,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 183 transitions, 1929 flow [2024-06-27 19:06:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:06:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:06:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 19:06:06,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 19:06:06,848 INFO L175 Difference]: Start difference. First operand has 120 places, 151 transitions, 1392 flow. Second operand 6 states and 138 transitions. [2024-06-27 19:06:06,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 183 transitions, 1929 flow [2024-06-27 19:06:07,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1893 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:06:07,050 INFO L231 Difference]: Finished difference. Result has 124 places, 155 transitions, 1474 flow [2024-06-27 19:06:07,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1474, PETRI_PLACES=124, PETRI_TRANSITIONS=155} [2024-06-27 19:06:07,051 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 73 predicate places. [2024-06-27 19:06:07,051 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 155 transitions, 1474 flow [2024-06-27 19:06:07,051 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 19:06:07,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:07,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:07,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:06:07,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:07,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1766028731, now seen corresponding path program 1 times [2024-06-27 19:06:07,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:07,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334906722] [2024-06-27 19:06:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:07,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:09,423 INFO 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 19:06:09,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:09,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334906722] [2024-06-27 19:06:09,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334906722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:09,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:09,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:09,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308121064] [2024-06-27 19:06:09,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:09,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:09,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:09,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:09,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:09,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:09,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 155 transitions, 1474 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:09,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:09,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:11,457 INFO L124 PetriNetUnfolderBase]: 5304/8234 cut-off events. [2024-06-27 19:06:11,457 INFO L125 PetriNetUnfolderBase]: For 102978/102978 co-relation queries the response was YES. [2024-06-27 19:06:11,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38787 conditions, 8234 events. 5304/8234 cut-off events. For 102978/102978 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 49975 event pairs, 1521 based on Foata normal form. 8/8236 useless extension candidates. Maximal degree in co-relation 38732. Up to 6663 conditions per place. [2024-06-27 19:06:11,508 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 182 selfloop transitions, 39 changer transitions 0/228 dead transitions. [2024-06-27 19:06:11,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 228 transitions, 2561 flow [2024-06-27 19:06:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:06:11,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 19:06:11,509 INFO L175 Difference]: Start difference. First operand has 124 places, 155 transitions, 1474 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:06:11,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 228 transitions, 2561 flow [2024-06-27 19:06:11,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 228 transitions, 2488 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 19:06:11,647 INFO L231 Difference]: Finished difference. Result has 130 places, 174 transitions, 1767 flow [2024-06-27 19:06:11,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1767, PETRI_PLACES=130, PETRI_TRANSITIONS=174} [2024-06-27 19:06:11,647 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 79 predicate places. [2024-06-27 19:06:11,647 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 174 transitions, 1767 flow [2024-06-27 19:06:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:11,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:11,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:11,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:06:11,648 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:11,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash -455665835, now seen corresponding path program 2 times [2024-06-27 19:06:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:11,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744045825] [2024-06-27 19:06:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:11,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:13,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:13,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744045825] [2024-06-27 19:06:13,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744045825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:13,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:13,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:13,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629069804] [2024-06-27 19:06:13,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:13,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:13,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:13,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 174 transitions, 1767 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:13,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:13,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:13,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:15,584 INFO L124 PetriNetUnfolderBase]: 5802/8941 cut-off events. [2024-06-27 19:06:15,584 INFO L125 PetriNetUnfolderBase]: For 121679/121679 co-relation queries the response was YES. [2024-06-27 19:06:15,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44929 conditions, 8941 events. 5802/8941 cut-off events. For 121679/121679 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 54179 event pairs, 1582 based on Foata normal form. 12/8942 useless extension candidates. Maximal degree in co-relation 44870. Up to 7334 conditions per place. [2024-06-27 19:06:15,656 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 173 selfloop transitions, 51 changer transitions 0/231 dead transitions. [2024-06-27 19:06:15,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 231 transitions, 2670 flow [2024-06-27 19:06:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:06:15,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 19:06:15,657 INFO L175 Difference]: Start difference. First operand has 130 places, 174 transitions, 1767 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:06:15,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 231 transitions, 2670 flow [2024-06-27 19:06:15,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 231 transitions, 2610 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-27 19:06:15,840 INFO L231 Difference]: Finished difference. Result has 137 places, 190 transitions, 2092 flow [2024-06-27 19:06:15,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2092, PETRI_PLACES=137, PETRI_TRANSITIONS=190} [2024-06-27 19:06:15,843 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 86 predicate places. [2024-06-27 19:06:15,843 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 190 transitions, 2092 flow [2024-06-27 19:06:15,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:15,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:15,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:06:15,843 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 19:06:15,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1760314811, now seen corresponding path program 3 times [2024-06-27 19:06:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:15,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516257768] [2024-06-27 19:06:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:18,040 INFO 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 19:06:18,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:18,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516257768] [2024-06-27 19:06:18,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516257768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:18,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:18,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:18,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899723164] [2024-06-27 19:06:18,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:18,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:18,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:18,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:18,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:18,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:18,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 190 transitions, 2092 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:18,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:18,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:18,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:20,237 INFO L124 PetriNetUnfolderBase]: 5974/9177 cut-off events. [2024-06-27 19:06:20,237 INFO L125 PetriNetUnfolderBase]: For 138716/138716 co-relation queries the response was YES. [2024-06-27 19:06:20,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48832 conditions, 9177 events. 5974/9177 cut-off events. For 138716/138716 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55603 event pairs, 1552 based on Foata normal form. 12/9178 useless extension candidates. Maximal degree in co-relation 48769. Up to 7466 conditions per place. [2024-06-27 19:06:20,304 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 185 selfloop transitions, 63 changer transitions 0/255 dead transitions. [2024-06-27 19:06:20,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 255 transitions, 3034 flow [2024-06-27 19:06:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:06:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:06:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 19:06:20,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-06-27 19:06:20,306 INFO L175 Difference]: Start difference. First operand has 137 places, 190 transitions, 2092 flow. Second operand 9 states and 223 transitions. [2024-06-27 19:06:20,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 255 transitions, 3034 flow [2024-06-27 19:06:20,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 255 transitions, 2859 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-27 19:06:20,533 INFO L231 Difference]: Finished difference. Result has 143 places, 198 transitions, 2197 flow [2024-06-27 19:06:20,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2197, PETRI_PLACES=143, PETRI_TRANSITIONS=198} [2024-06-27 19:06:20,534 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-27 19:06:20,534 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 198 transitions, 2197 flow [2024-06-27 19:06:20,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:20,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:20,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:20,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:06:20,535 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:20,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1765658689, now seen corresponding path program 1 times [2024-06-27 19:06:20,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:20,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430891218] [2024-06-27 19:06:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:20,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:23,810 INFO 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 19:06:23,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430891218] [2024-06-27 19:06:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430891218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:23,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:23,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:23,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851625404] [2024-06-27 19:06:23,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:23,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:23,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:23,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:23,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:23,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 198 transitions, 2197 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:23,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:23,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:23,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:25,953 INFO L124 PetriNetUnfolderBase]: 6181/9562 cut-off events. [2024-06-27 19:06:25,953 INFO L125 PetriNetUnfolderBase]: For 141238/141238 co-relation queries the response was YES. [2024-06-27 19:06:25,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50256 conditions, 9562 events. 6181/9562 cut-off events. For 141238/141238 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 59021 event pairs, 1667 based on Foata normal form. 14/9565 useless extension candidates. Maximal degree in co-relation 50191. Up to 8283 conditions per place. [2024-06-27 19:06:26,028 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 200 selfloop transitions, 38 changer transitions 0/245 dead transitions. [2024-06-27 19:06:26,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 245 transitions, 2989 flow [2024-06-27 19:06:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:06:26,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:06:26,031 INFO L175 Difference]: Start difference. First operand has 143 places, 198 transitions, 2197 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:06:26,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 245 transitions, 2989 flow [2024-06-27 19:06:26,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 245 transitions, 2795 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 19:06:26,254 INFO L231 Difference]: Finished difference. Result has 143 places, 200 transitions, 2122 flow [2024-06-27 19:06:26,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2122, PETRI_PLACES=143, PETRI_TRANSITIONS=200} [2024-06-27 19:06:26,254 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-27 19:06:26,254 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 200 transitions, 2122 flow [2024-06-27 19:06:26,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:26,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:26,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:26,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:06:26,255 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:26,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash -76857433, now seen corresponding path program 1 times [2024-06-27 19:06:26,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:26,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410612269] [2024-06-27 19:06:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:28,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:28,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410612269] [2024-06-27 19:06:28,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410612269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:28,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:28,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:28,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023672553] [2024-06-27 19:06:28,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:28,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:28,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:28,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:28,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 200 transitions, 2122 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:28,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:28,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:28,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:30,760 INFO L124 PetriNetUnfolderBase]: 6886/10589 cut-off events. [2024-06-27 19:06:30,760 INFO L125 PetriNetUnfolderBase]: For 151705/151717 co-relation queries the response was YES. [2024-06-27 19:06:30,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55728 conditions, 10589 events. 6886/10589 cut-off events. For 151705/151717 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 65654 event pairs, 1798 based on Foata normal form. 10/10594 useless extension candidates. Maximal degree in co-relation 55662. Up to 8042 conditions per place. [2024-06-27 19:06:30,847 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 233 selfloop transitions, 96 changer transitions 0/336 dead transitions. [2024-06-27 19:06:30,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 336 transitions, 4218 flow [2024-06-27 19:06:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:06:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:06:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 19:06:30,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877659574468085 [2024-06-27 19:06:30,848 INFO L175 Difference]: Start difference. First operand has 143 places, 200 transitions, 2122 flow. Second operand 8 states and 221 transitions. [2024-06-27 19:06:30,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 336 transitions, 4218 flow [2024-06-27 19:06:31,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 336 transitions, 4133 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:06:31,074 INFO L231 Difference]: Finished difference. Result has 151 places, 252 transitions, 3041 flow [2024-06-27 19:06:31,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3041, PETRI_PLACES=151, PETRI_TRANSITIONS=252} [2024-06-27 19:06:31,075 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 100 predicate places. [2024-06-27 19:06:31,075 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 252 transitions, 3041 flow [2024-06-27 19:06:31,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:31,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:31,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:31,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:06:31,075 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:31,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash -469209915, now seen corresponding path program 2 times [2024-06-27 19:06:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:31,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527278689] [2024-06-27 19:06:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:31,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:33,116 INFO 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 19:06:33,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:33,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527278689] [2024-06-27 19:06:33,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527278689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:33,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:33,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:33,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066727450] [2024-06-27 19:06:33,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:33,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:33,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:33,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:33,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:33,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 252 transitions, 3041 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:33,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:33,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:33,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:35,810 INFO L124 PetriNetUnfolderBase]: 7286/11199 cut-off events. [2024-06-27 19:06:35,811 INFO L125 PetriNetUnfolderBase]: For 176288/176300 co-relation queries the response was YES. [2024-06-27 19:06:35,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63354 conditions, 11199 events. 7286/11199 cut-off events. For 176288/176300 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 69952 event pairs, 1842 based on Foata normal form. 12/11206 useless extension candidates. Maximal degree in co-relation 63282. Up to 8289 conditions per place. [2024-06-27 19:06:35,913 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 210 selfloop transitions, 121 changer transitions 0/338 dead transitions. [2024-06-27 19:06:35,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 338 transitions, 4631 flow [2024-06-27 19:06:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 19:06:35,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:06:35,915 INFO L175 Difference]: Start difference. First operand has 151 places, 252 transitions, 3041 flow. Second operand 7 states and 188 transitions. [2024-06-27 19:06:35,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 338 transitions, 4631 flow [2024-06-27 19:06:36,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 338 transitions, 4535 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-27 19:06:36,261 INFO L231 Difference]: Finished difference. Result has 158 places, 275 transitions, 3642 flow [2024-06-27 19:06:36,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3642, PETRI_PLACES=158, PETRI_TRANSITIONS=275} [2024-06-27 19:06:36,261 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 107 predicate places. [2024-06-27 19:06:36,261 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 275 transitions, 3642 flow [2024-06-27 19:06:36,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:36,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:36,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:36,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:06:36,262 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:36,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:36,262 INFO L85 PathProgramCache]: Analyzing trace with hash 714904237, now seen corresponding path program 3 times [2024-06-27 19:06:36,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:36,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690914875] [2024-06-27 19:06:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:36,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:38,543 INFO 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 19:06:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690914875] [2024-06-27 19:06:38,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690914875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:38,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:38,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869466579] [2024-06-27 19:06:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:38,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:38,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 275 transitions, 3642 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:38,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:38,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:38,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:41,209 INFO L124 PetriNetUnfolderBase]: 7430/11335 cut-off events. [2024-06-27 19:06:41,209 INFO L125 PetriNetUnfolderBase]: For 189054/189054 co-relation queries the response was YES. [2024-06-27 19:06:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66755 conditions, 11335 events. 7430/11335 cut-off events. For 189054/189054 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 70130 event pairs, 1832 based on Foata normal form. 6/11338 useless extension candidates. Maximal degree in co-relation 66679. Up to 10057 conditions per place. [2024-06-27 19:06:41,320 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 274 selfloop transitions, 58 changer transitions 0/339 dead transitions. [2024-06-27 19:06:41,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 339 transitions, 4852 flow [2024-06-27 19:06:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:06:41,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-27 19:06:41,322 INFO L175 Difference]: Start difference. First operand has 158 places, 275 transitions, 3642 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:06:41,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 339 transitions, 4852 flow [2024-06-27 19:06:41,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 339 transitions, 4683 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:06:41,612 INFO L231 Difference]: Finished difference. Result has 161 places, 288 transitions, 3863 flow [2024-06-27 19:06:41,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3863, PETRI_PLACES=161, PETRI_TRANSITIONS=288} [2024-06-27 19:06:41,612 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 110 predicate places. [2024-06-27 19:06:41,612 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 288 transitions, 3863 flow [2024-06-27 19:06:41,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:41,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:41,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:41,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:06:41,613 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:41,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash 966016517, now seen corresponding path program 4 times [2024-06-27 19:06:41,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:41,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202100288] [2024-06-27 19:06:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:43,823 INFO 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 19:06:43,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:43,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202100288] [2024-06-27 19:06:43,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202100288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:43,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:43,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685129556] [2024-06-27 19:06:43,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:43,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:43,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:43,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:43,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 288 transitions, 3863 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:43,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:43,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:43,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:46,563 INFO L124 PetriNetUnfolderBase]: 7504/11474 cut-off events. [2024-06-27 19:06:46,563 INFO L125 PetriNetUnfolderBase]: For 192724/192724 co-relation queries the response was YES. [2024-06-27 19:06:46,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66736 conditions, 11474 events. 7504/11474 cut-off events. For 192724/192724 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 71195 event pairs, 1757 based on Foata normal form. 4/11469 useless extension candidates. Maximal degree in co-relation 66660. Up to 8441 conditions per place. [2024-06-27 19:06:46,679 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 231 selfloop transitions, 118 changer transitions 0/356 dead transitions. [2024-06-27 19:06:46,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 356 transitions, 5271 flow [2024-06-27 19:06:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:06:46,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 19:06:46,681 INFO L175 Difference]: Start difference. First operand has 161 places, 288 transitions, 3863 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:06:46,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 356 transitions, 5271 flow [2024-06-27 19:06:47,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 356 transitions, 5060 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 19:06:47,031 INFO L231 Difference]: Finished difference. Result has 164 places, 294 transitions, 4024 flow [2024-06-27 19:06:47,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4024, PETRI_PLACES=164, PETRI_TRANSITIONS=294} [2024-06-27 19:06:47,031 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-27 19:06:47,031 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 294 transitions, 4024 flow [2024-06-27 19:06:47,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:47,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:47,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:47,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:06:47,032 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:47,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash 977444357, now seen corresponding path program 5 times [2024-06-27 19:06:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:47,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427974325] [2024-06-27 19:06:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:47,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:49,234 INFO 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 19:06:49,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427974325] [2024-06-27 19:06:49,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427974325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:49,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:49,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:49,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441157852] [2024-06-27 19:06:49,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:49,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:49,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:49,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:49,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 294 transitions, 4024 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:49,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:49,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:49,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:52,127 INFO L124 PetriNetUnfolderBase]: 7478/11444 cut-off events. [2024-06-27 19:06:52,128 INFO L125 PetriNetUnfolderBase]: For 199311/199311 co-relation queries the response was YES. [2024-06-27 19:06:52,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67425 conditions, 11444 events. 7478/11444 cut-off events. For 199311/199311 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 71045 event pairs, 1758 based on Foata normal form. 6/11441 useless extension candidates. Maximal degree in co-relation 67348. Up to 8422 conditions per place. [2024-06-27 19:06:52,246 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 230 selfloop transitions, 112 changer transitions 0/349 dead transitions. [2024-06-27 19:06:52,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 349 transitions, 5129 flow [2024-06-27 19:06:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:06:52,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 19:06:52,256 INFO L175 Difference]: Start difference. First operand has 164 places, 294 transitions, 4024 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:06:52,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 349 transitions, 5129 flow [2024-06-27 19:06:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 349 transitions, 4962 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:06:52,618 INFO L231 Difference]: Finished difference. Result has 167 places, 294 transitions, 4093 flow [2024-06-27 19:06:52,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3857, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4093, PETRI_PLACES=167, PETRI_TRANSITIONS=294} [2024-06-27 19:06:52,618 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2024-06-27 19:06:52,618 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 294 transitions, 4093 flow [2024-06-27 19:06:52,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:52,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:52,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:52,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:06:52,619 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:52,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1939324903, now seen corresponding path program 6 times [2024-06-27 19:06:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:52,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388939324] [2024-06-27 19:06:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:55,079 INFO 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 19:06:55,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:55,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388939324] [2024-06-27 19:06:55,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388939324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:55,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:55,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:55,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669153143] [2024-06-27 19:06:55,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:55,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:55,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:55,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:06:55,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 294 transitions, 4093 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:55,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:55,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:06:55,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:57,759 INFO L124 PetriNetUnfolderBase]: 7434/11361 cut-off events. [2024-06-27 19:06:57,759 INFO L125 PetriNetUnfolderBase]: For 209798/209798 co-relation queries the response was YES. [2024-06-27 19:06:57,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66530 conditions, 11361 events. 7434/11361 cut-off events. For 209798/209798 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 70334 event pairs, 1754 based on Foata normal form. 12/11358 useless extension candidates. Maximal degree in co-relation 66453. Up to 8980 conditions per place. [2024-06-27 19:06:57,870 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 257 selfloop transitions, 96 changer transitions 0/360 dead transitions. [2024-06-27 19:06:57,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 360 transitions, 5258 flow [2024-06-27 19:06:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:06:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:06:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:06:57,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 19:06:57,872 INFO L175 Difference]: Start difference. First operand has 167 places, 294 transitions, 4093 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:06:57,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 360 transitions, 5258 flow [2024-06-27 19:06:58,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 360 transitions, 5074 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:06:58,265 INFO L231 Difference]: Finished difference. Result has 171 places, 295 transitions, 4168 flow [2024-06-27 19:06:58,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4168, PETRI_PLACES=171, PETRI_TRANSITIONS=295} [2024-06-27 19:06:58,265 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 19:06:58,265 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 295 transitions, 4168 flow [2024-06-27 19:06:58,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:58,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:58,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:58,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:06:58,266 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:58,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash 338328815, now seen corresponding path program 7 times [2024-06-27 19:06:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:58,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556245174] [2024-06-27 19:06:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:58,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:00,852 INFO 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 19:07:00,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556245174] [2024-06-27 19:07:00,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556245174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:00,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:00,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:07:00,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787804719] [2024-06-27 19:07:00,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:00,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:07:00,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:00,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:07:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:07:00,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:00,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 295 transitions, 4168 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:00,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:00,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:00,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:03,231 INFO L124 PetriNetUnfolderBase]: 7408/11325 cut-off events. [2024-06-27 19:07:03,231 INFO L125 PetriNetUnfolderBase]: For 209453/209453 co-relation queries the response was YES. [2024-06-27 19:07:03,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66318 conditions, 11325 events. 7408/11325 cut-off events. For 209453/209453 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 70177 event pairs, 1786 based on Foata normal form. 6/11316 useless extension candidates. Maximal degree in co-relation 66240. Up to 8961 conditions per place. [2024-06-27 19:07:03,339 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 245 selfloop transitions, 87 changer transitions 0/339 dead transitions. [2024-06-27 19:07:03,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 339 transitions, 5044 flow [2024-06-27 19:07:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:07:03,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:07:03,341 INFO L175 Difference]: Start difference. First operand has 171 places, 295 transitions, 4168 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:07:03,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 339 transitions, 5044 flow [2024-06-27 19:07:03,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 339 transitions, 4677 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-27 19:07:03,858 INFO L231 Difference]: Finished difference. Result has 171 places, 295 transitions, 3989 flow [2024-06-27 19:07:03,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3801, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3989, PETRI_PLACES=171, PETRI_TRANSITIONS=295} [2024-06-27 19:07:03,859 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 19:07:03,859 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 295 transitions, 3989 flow [2024-06-27 19:07:03,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:03,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:03,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:03,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:07:03,860 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:03,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash 220189613, now seen corresponding path program 1 times [2024-06-27 19:07:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:03,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519418665] [2024-06-27 19:07:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:03,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:06,662 INFO 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 19:07:06,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:06,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519418665] [2024-06-27 19:07:06,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519418665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:06,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:06,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:06,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198939805] [2024-06-27 19:07:06,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:06,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:06,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:06,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:06,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 295 transitions, 3989 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:06,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:06,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:06,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:09,212 INFO L124 PetriNetUnfolderBase]: 7446/11445 cut-off events. [2024-06-27 19:07:09,213 INFO L125 PetriNetUnfolderBase]: For 200252/200252 co-relation queries the response was YES. [2024-06-27 19:07:09,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65149 conditions, 11445 events. 7446/11445 cut-off events. For 200252/200252 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 71777 event pairs, 1883 based on Foata normal form. 2/11444 useless extension candidates. Maximal degree in co-relation 65070. Up to 10377 conditions per place. [2024-06-27 19:07:09,325 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 314 selfloop transitions, 27 changer transitions 0/348 dead transitions. [2024-06-27 19:07:09,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 348 transitions, 5165 flow [2024-06-27 19:07:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:07:09,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-27 19:07:09,327 INFO L175 Difference]: Start difference. First operand has 171 places, 295 transitions, 3989 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:07:09,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 348 transitions, 5165 flow [2024-06-27 19:07:09,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 348 transitions, 4859 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:09,868 INFO L231 Difference]: Finished difference. Result has 173 places, 300 transitions, 3870 flow [2024-06-27 19:07:09,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3870, PETRI_PLACES=173, PETRI_TRANSITIONS=300} [2024-06-27 19:07:09,869 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 122 predicate places. [2024-06-27 19:07:09,869 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 300 transitions, 3870 flow [2024-06-27 19:07:09,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:09,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:09,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:09,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:07:09,869 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:09,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:09,870 INFO L85 PathProgramCache]: Analyzing trace with hash 921659605, now seen corresponding path program 2 times [2024-06-27 19:07:09,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:09,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925041102] [2024-06-27 19:07:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:09,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:12,448 INFO 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 19:07:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925041102] [2024-06-27 19:07:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925041102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:12,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:12,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:07:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038415818] [2024-06-27 19:07:12,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:07:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:07:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:07:12,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:12,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 300 transitions, 3870 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 19:07:12,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:12,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:12,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:14,948 INFO L124 PetriNetUnfolderBase]: 7484/11489 cut-off events. [2024-06-27 19:07:14,948 INFO L125 PetriNetUnfolderBase]: For 196721/196721 co-relation queries the response was YES. [2024-06-27 19:07:15,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64435 conditions, 11489 events. 7484/11489 cut-off events. For 196721/196721 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 72098 event pairs, 1963 based on Foata normal form. 2/11488 useless extension candidates. Maximal degree in co-relation 64354. Up to 10528 conditions per place. [2024-06-27 19:07:15,070 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 313 selfloop transitions, 24 changer transitions 0/344 dead transitions. [2024-06-27 19:07:15,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 344 transitions, 4836 flow [2024-06-27 19:07:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:07:15,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045592705167173 [2024-06-27 19:07:15,072 INFO L175 Difference]: Start difference. First operand has 173 places, 300 transitions, 3870 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:07:15,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 344 transitions, 4836 flow [2024-06-27 19:07:15,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 344 transitions, 4684 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 19:07:15,564 INFO L231 Difference]: Finished difference. Result has 176 places, 302 transitions, 3817 flow [2024-06-27 19:07:15,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3730, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3817, PETRI_PLACES=176, PETRI_TRANSITIONS=302} [2024-06-27 19:07:15,565 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-27 19:07:15,565 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 302 transitions, 3817 flow [2024-06-27 19:07:15,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 19:07:15,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:15,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:15,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:07:15,566 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:15,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1946000071, now seen corresponding path program 3 times [2024-06-27 19:07:15,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:15,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574353486] [2024-06-27 19:07:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:15,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:18,456 INFO 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 19:07:18,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:18,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574353486] [2024-06-27 19:07:18,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574353486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:18,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:18,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382701165] [2024-06-27 19:07:18,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:18,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:18,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:18,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 302 transitions, 3817 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:18,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:18,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:18,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:21,026 INFO L124 PetriNetUnfolderBase]: 7487/11547 cut-off events. [2024-06-27 19:07:21,027 INFO L125 PetriNetUnfolderBase]: For 193261/193261 co-relation queries the response was YES. [2024-06-27 19:07:21,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64302 conditions, 11547 events. 7487/11547 cut-off events. For 193261/193261 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 73091 event pairs, 2210 based on Foata normal form. 2/11546 useless extension candidates. Maximal degree in co-relation 64219. Up to 10625 conditions per place. [2024-06-27 19:07:21,151 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 315 selfloop transitions, 18 changer transitions 0/340 dead transitions. [2024-06-27 19:07:21,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 340 transitions, 4707 flow [2024-06-27 19:07:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 19:07:21,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48328267477203646 [2024-06-27 19:07:21,153 INFO L175 Difference]: Start difference. First operand has 176 places, 302 transitions, 3817 flow. Second operand 7 states and 159 transitions. [2024-06-27 19:07:21,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 340 transitions, 4707 flow [2024-06-27 19:07:21,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 340 transitions, 4632 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:07:21,621 INFO L231 Difference]: Finished difference. Result has 178 places, 305 transitions, 3866 flow [2024-06-27 19:07:21,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3866, PETRI_PLACES=178, PETRI_TRANSITIONS=305} [2024-06-27 19:07:21,622 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 127 predicate places. [2024-06-27 19:07:21,622 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 305 transitions, 3866 flow [2024-06-27 19:07:21,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:21,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:21,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:21,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:07:21,622 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:21,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash 547969924, now seen corresponding path program 1 times [2024-06-27 19:07:21,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:21,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822469197] [2024-06-27 19:07:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:21,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:24,659 INFO 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 19:07:24,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822469197] [2024-06-27 19:07:24,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822469197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:24,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:24,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:24,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029306450] [2024-06-27 19:07:24,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:24,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:24,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:24,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:24,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 305 transitions, 3866 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 19:07:24,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:24,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:24,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:27,341 INFO L124 PetriNetUnfolderBase]: 7737/11946 cut-off events. [2024-06-27 19:07:27,341 INFO L125 PetriNetUnfolderBase]: For 211603/211603 co-relation queries the response was YES. [2024-06-27 19:07:27,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66413 conditions, 11946 events. 7737/11946 cut-off events. For 211603/211603 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 75870 event pairs, 1931 based on Foata normal form. 14/11945 useless extension candidates. Maximal degree in co-relation 66329. Up to 10314 conditions per place. [2024-06-27 19:07:27,468 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 307 selfloop transitions, 44 changer transitions 0/358 dead transitions. [2024-06-27 19:07:27,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 358 transitions, 4968 flow [2024-06-27 19:07:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:07:27,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:07:27,471 INFO L175 Difference]: Start difference. First operand has 178 places, 305 transitions, 3866 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:07:27,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 358 transitions, 4968 flow [2024-06-27 19:07:27,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 358 transitions, 4882 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:07:27,978 INFO L231 Difference]: Finished difference. Result has 180 places, 307 transitions, 3908 flow [2024-06-27 19:07:27,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3908, PETRI_PLACES=180, PETRI_TRANSITIONS=307} [2024-06-27 19:07:27,979 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2024-06-27 19:07:27,979 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 307 transitions, 3908 flow [2024-06-27 19:07:27,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 19:07:27,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:27,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:27,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:07:27,979 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:27,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash 562254724, now seen corresponding path program 2 times [2024-06-27 19:07:27,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:27,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996699593] [2024-06-27 19:07:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:27,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:31,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:31,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996699593] [2024-06-27 19:07:31,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996699593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:31,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:31,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900111499] [2024-06-27 19:07:31,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:31,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:31,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:31,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:31,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 307 transitions, 3908 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 19:07:31,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:31,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:31,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:33,723 INFO L124 PetriNetUnfolderBase]: 7984/12279 cut-off events. [2024-06-27 19:07:33,724 INFO L125 PetriNetUnfolderBase]: For 225434/225434 co-relation queries the response was YES. [2024-06-27 19:07:33,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69434 conditions, 12279 events. 7984/12279 cut-off events. For 225434/225434 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 77701 event pairs, 1941 based on Foata normal form. 8/12272 useless extension candidates. Maximal degree in co-relation 69349. Up to 10032 conditions per place. [2024-06-27 19:07:33,863 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 313 selfloop transitions, 42 changer transitions 0/362 dead transitions. [2024-06-27 19:07:33,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 362 transitions, 5104 flow [2024-06-27 19:07:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:07:33,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-06-27 19:07:33,864 INFO L175 Difference]: Start difference. First operand has 180 places, 307 transitions, 3908 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:07:33,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 362 transitions, 5104 flow [2024-06-27 19:07:34,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 362 transitions, 5020 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:07:34,529 INFO L231 Difference]: Finished difference. Result has 183 places, 309 transitions, 3946 flow [2024-06-27 19:07:34,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3824, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3946, PETRI_PLACES=183, PETRI_TRANSITIONS=309} [2024-06-27 19:07:34,529 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 132 predicate places. [2024-06-27 19:07:34,530 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 309 transitions, 3946 flow [2024-06-27 19:07:34,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 19:07:34,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:34,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:34,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:07:34,530 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:34,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:34,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1764054688, now seen corresponding path program 1 times [2024-06-27 19:07:34,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:34,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990214080] [2024-06-27 19:07:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:34,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:37,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:37,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990214080] [2024-06-27 19:07:37,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990214080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:37,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:37,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:37,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915052159] [2024-06-27 19:07:37,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:37,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:37,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:37,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:37,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:37,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 309 transitions, 3946 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:37,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:37,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:37,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:41,139 INFO L124 PetriNetUnfolderBase]: 8771/13427 cut-off events. [2024-06-27 19:07:41,139 INFO L125 PetriNetUnfolderBase]: For 281144/281144 co-relation queries the response was YES. [2024-06-27 19:07:41,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77400 conditions, 13427 events. 8771/13427 cut-off events. For 281144/281144 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 85654 event pairs, 1957 based on Foata normal form. 16/13434 useless extension candidates. Maximal degree in co-relation 77314. Up to 8173 conditions per place. [2024-06-27 19:07:41,275 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 272 selfloop transitions, 115 changer transitions 0/394 dead transitions. [2024-06-27 19:07:41,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 394 transitions, 5549 flow [2024-06-27 19:07:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 19:07:41,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 19:07:41,277 INFO L175 Difference]: Start difference. First operand has 183 places, 309 transitions, 3946 flow. Second operand 8 states and 212 transitions. [2024-06-27 19:07:41,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 394 transitions, 5549 flow [2024-06-27 19:07:41,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 394 transitions, 5495 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:07:41,864 INFO L231 Difference]: Finished difference. Result has 190 places, 315 transitions, 4327 flow [2024-06-27 19:07:41,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4327, PETRI_PLACES=190, PETRI_TRANSITIONS=315} [2024-06-27 19:07:41,864 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 139 predicate places. [2024-06-27 19:07:41,865 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 315 transitions, 4327 flow [2024-06-27 19:07:41,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:41,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:41,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:41,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:07:41,865 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:41,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:41,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1762177018, now seen corresponding path program 2 times [2024-06-27 19:07:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:41,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13986743] [2024-06-27 19:07:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:44,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13986743] [2024-06-27 19:07:44,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13986743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:44,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:44,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902413892] [2024-06-27 19:07:44,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:44,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:44,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:44,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:44,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 315 transitions, 4327 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:44,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:44,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:44,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:48,099 INFO L124 PetriNetUnfolderBase]: 9195/14065 cut-off events. [2024-06-27 19:07:48,100 INFO L125 PetriNetUnfolderBase]: For 326341/326341 co-relation queries the response was YES. [2024-06-27 19:07:48,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84340 conditions, 14065 events. 9195/14065 cut-off events. For 326341/326341 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 90278 event pairs, 2156 based on Foata normal form. 24/14080 useless extension candidates. Maximal degree in co-relation 84250. Up to 10481 conditions per place. [2024-06-27 19:07:48,314 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 258 selfloop transitions, 119 changer transitions 0/384 dead transitions. [2024-06-27 19:07:48,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 384 transitions, 5547 flow [2024-06-27 19:07:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:07:48,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 19:07:48,316 INFO L175 Difference]: Start difference. First operand has 190 places, 315 transitions, 4327 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:07:48,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 384 transitions, 5547 flow [2024-06-27 19:07:49,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 384 transitions, 5406 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:07:49,513 INFO L231 Difference]: Finished difference. Result has 195 places, 317 transitions, 4477 flow [2024-06-27 19:07:49,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4186, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4477, PETRI_PLACES=195, PETRI_TRANSITIONS=317} [2024-06-27 19:07:49,514 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-06-27 19:07:49,514 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 317 transitions, 4477 flow [2024-06-27 19:07:49,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:49,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:49,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:49,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:07:49,514 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:49,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:49,515 INFO L85 PathProgramCache]: Analyzing trace with hash 232707744, now seen corresponding path program 3 times [2024-06-27 19:07:49,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:49,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342039112] [2024-06-27 19:07:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:49,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:52,764 INFO 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 19:07:52,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:52,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342039112] [2024-06-27 19:07:52,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342039112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:52,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:52,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:52,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166664177] [2024-06-27 19:07:52,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:52,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:52,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:52,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:07:52,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 317 transitions, 4477 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:52,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:52,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:07:52,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:56,287 INFO L124 PetriNetUnfolderBase]: 9760/14868 cut-off events. [2024-06-27 19:07:56,287 INFO L125 PetriNetUnfolderBase]: For 355949/355949 co-relation queries the response was YES. [2024-06-27 19:07:56,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92094 conditions, 14868 events. 9760/14868 cut-off events. For 355949/355949 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 96186 event pairs, 2171 based on Foata normal form. 16/14875 useless extension candidates. Maximal degree in co-relation 92002. Up to 10411 conditions per place. [2024-06-27 19:07:56,442 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 270 selfloop transitions, 114 changer transitions 0/391 dead transitions. [2024-06-27 19:07:56,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 391 transitions, 5848 flow [2024-06-27 19:07:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:07:56,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-27 19:07:56,444 INFO L175 Difference]: Start difference. First operand has 195 places, 317 transitions, 4477 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:07:56,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 391 transitions, 5848 flow [2024-06-27 19:07:57,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 391 transitions, 5598 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:57,310 INFO L231 Difference]: Finished difference. Result has 198 places, 321 transitions, 4566 flow [2024-06-27 19:07:57,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4566, PETRI_PLACES=198, PETRI_TRANSITIONS=321} [2024-06-27 19:07:57,311 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 147 predicate places. [2024-06-27 19:07:57,311 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 321 transitions, 4566 flow [2024-06-27 19:07:57,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:57,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:57,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:57,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:07:57,311 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:57,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1703303222, now seen corresponding path program 4 times [2024-06-27 19:07:57,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:57,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382752026] [2024-06-27 19:07:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:57,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:00,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:00,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382752026] [2024-06-27 19:08:00,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382752026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:00,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:00,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:00,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828034753] [2024-06-27 19:08:00,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:00,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:00,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:00,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:00,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:08:00,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 321 transitions, 4566 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:00,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:00,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:08:00,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:04,506 INFO L124 PetriNetUnfolderBase]: 10876/16685 cut-off events. [2024-06-27 19:08:04,507 INFO L125 PetriNetUnfolderBase]: For 447006/447006 co-relation queries the response was YES. [2024-06-27 19:08:04,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101459 conditions, 16685 events. 10876/16685 cut-off events. For 447006/447006 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 110450 event pairs, 2631 based on Foata normal form. 68/16738 useless extension candidates. Maximal degree in co-relation 101365. Up to 12533 conditions per place. [2024-06-27 19:08:04,701 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 285 selfloop transitions, 106 changer transitions 0/398 dead transitions. [2024-06-27 19:08:04,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 398 transitions, 5815 flow [2024-06-27 19:08:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:08:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:08:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-27 19:08:04,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:08:04,704 INFO L175 Difference]: Start difference. First operand has 198 places, 321 transitions, 4566 flow. Second operand 10 states and 250 transitions. [2024-06-27 19:08:04,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 398 transitions, 5815 flow [2024-06-27 19:08:05,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 398 transitions, 5656 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:05,790 INFO L231 Difference]: Finished difference. Result has 204 places, 324 transitions, 4732 flow [2024-06-27 19:08:05,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4409, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4732, PETRI_PLACES=204, PETRI_TRANSITIONS=324} [2024-06-27 19:08:05,791 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 153 predicate places. [2024-06-27 19:08:05,791 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 324 transitions, 4732 flow [2024-06-27 19:08:05,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:05,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:05,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:05,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:08:05,792 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:05,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 562261668, now seen corresponding path program 1 times [2024-06-27 19:08:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:05,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982725406] [2024-06-27 19:08:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:05,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:09,525 INFO 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 19:08:09,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982725406] [2024-06-27 19:08:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982725406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:09,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:09,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:09,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302153987] [2024-06-27 19:08:09,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:09,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:09,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:09,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:08:09,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 324 transitions, 4732 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:09,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:09,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:08:09,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:14,944 INFO L124 PetriNetUnfolderBase]: 12962/19807 cut-off events. [2024-06-27 19:08:14,944 INFO L125 PetriNetUnfolderBase]: For 553492/553492 co-relation queries the response was YES. [2024-06-27 19:08:15,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121294 conditions, 19807 events. 12962/19807 cut-off events. For 553492/553492 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 133535 event pairs, 2855 based on Foata normal form. 56/19848 useless extension candidates. Maximal degree in co-relation 121198. Up to 12431 conditions per place. [2024-06-27 19:08:15,155 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 292 selfloop transitions, 115 changer transitions 0/414 dead transitions. [2024-06-27 19:08:15,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 414 transitions, 6292 flow [2024-06-27 19:08:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:08:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:08:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 19:08:15,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 19:08:15,168 INFO L175 Difference]: Start difference. First operand has 204 places, 324 transitions, 4732 flow. Second operand 10 states and 255 transitions. [2024-06-27 19:08:15,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 414 transitions, 6292 flow [2024-06-27 19:08:16,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 414 transitions, 6020 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 19:08:16,978 INFO L231 Difference]: Finished difference. Result has 207 places, 333 transitions, 4970 flow [2024-06-27 19:08:16,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4970, PETRI_PLACES=207, PETRI_TRANSITIONS=333} [2024-06-27 19:08:16,979 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 156 predicate places. [2024-06-27 19:08:16,979 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 333 transitions, 4970 flow [2024-06-27 19:08:16,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:16,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:16,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:08:16,980 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:16,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash 355191216, now seen corresponding path program 5 times [2024-06-27 19:08:16,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:16,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093204528] [2024-06-27 19:08:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:20,572 INFO 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 19:08:20,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093204528] [2024-06-27 19:08:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093204528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:20,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:20,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:20,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438954295] [2024-06-27 19:08:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:20,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:20,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:20,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:20,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:20,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:08:20,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 333 transitions, 4970 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:20,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:20,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:08:20,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:25,810 INFO L124 PetriNetUnfolderBase]: 12814/19899 cut-off events. [2024-06-27 19:08:25,810 INFO L125 PetriNetUnfolderBase]: For 503185/503185 co-relation queries the response was YES. [2024-06-27 19:08:25,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117458 conditions, 19899 events. 12814/19899 cut-off events. For 503185/503185 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 137494 event pairs, 3458 based on Foata normal form. 68/19953 useless extension candidates. Maximal degree in co-relation 117360. Up to 15443 conditions per place. [2024-06-27 19:08:26,063 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 287 selfloop transitions, 101 changer transitions 0/395 dead transitions. [2024-06-27 19:08:26,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 395 transitions, 6135 flow [2024-06-27 19:08:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:08:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:08:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:08:26,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508274231678487 [2024-06-27 19:08:26,065 INFO L175 Difference]: Start difference. First operand has 207 places, 333 transitions, 4970 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:08:26,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 395 transitions, 6135 flow [2024-06-27 19:08:27,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 395 transitions, 5810 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:27,975 INFO L231 Difference]: Finished difference. Result has 211 places, 336 transitions, 4939 flow [2024-06-27 19:08:27,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4678, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4939, PETRI_PLACES=211, PETRI_TRANSITIONS=336} [2024-06-27 19:08:27,976 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-27 19:08:27,976 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 336 transitions, 4939 flow [2024-06-27 19:08:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:27,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:27,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:08:27,977 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:27,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash 355187496, now seen corresponding path program 6 times [2024-06-27 19:08:27,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:27,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478124883] [2024-06-27 19:08:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:27,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:31,542 INFO 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 19:08:31,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:31,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478124883] [2024-06-27 19:08:31,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478124883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:31,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:31,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:31,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599877817] [2024-06-27 19:08:31,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:31,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:31,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:31,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:31,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:31,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:08:31,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 336 transitions, 4939 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:31,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:31,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:08:31,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:36,801 INFO L124 PetriNetUnfolderBase]: 14661/22546 cut-off events. [2024-06-27 19:08:36,802 INFO L125 PetriNetUnfolderBase]: For 543749/543749 co-relation queries the response was YES. [2024-06-27 19:08:37,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129085 conditions, 22546 events. 14661/22546 cut-off events. For 543749/543749 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 156713 event pairs, 3567 based on Foata normal form. 56/22587 useless extension candidates. Maximal degree in co-relation 128984. Up to 13192 conditions per place. [2024-06-27 19:08:37,250 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 304 selfloop transitions, 95 changer transitions 0/406 dead transitions. [2024-06-27 19:08:37,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 406 transitions, 6361 flow [2024-06-27 19:08:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:08:37,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-27 19:08:37,252 INFO L175 Difference]: Start difference. First operand has 211 places, 336 transitions, 4939 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:08:37,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 406 transitions, 6361 flow [2024-06-27 19:08:38,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 406 transitions, 6145 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:08:38,963 INFO L231 Difference]: Finished difference. Result has 213 places, 342 transitions, 5171 flow [2024-06-27 19:08:38,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5171, PETRI_PLACES=213, PETRI_TRANSITIONS=342} [2024-06-27 19:08:38,963 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 162 predicate places. [2024-06-27 19:08:38,963 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 342 transitions, 5171 flow [2024-06-27 19:08:38,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:38,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:38,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:38,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:08:38,964 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:38,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash 159344390, now seen corresponding path program 1 times [2024-06-27 19:08:38,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:38,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514305027] [2024-06-27 19:08:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:38,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:39,044 INFO 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 19:08:39,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:39,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514305027] [2024-06-27 19:08:39,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514305027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:39,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:39,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:08:39,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773663210] [2024-06-27 19:08:39,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:39,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:08:39,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:39,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:08:39,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:08:39,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 19:08:39,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 342 transitions, 5171 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 19:08:39,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:39,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 19:08:39,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:42,932 INFO L124 PetriNetUnfolderBase]: 11246/17667 cut-off events. [2024-06-27 19:08:42,932 INFO L125 PetriNetUnfolderBase]: For 457266/457610 co-relation queries the response was YES. [2024-06-27 19:08:43,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100906 conditions, 17667 events. 11246/17667 cut-off events. For 457266/457610 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 124673 event pairs, 1918 based on Foata normal form. 789/18141 useless extension candidates. Maximal degree in co-relation 100805. Up to 8009 conditions per place. [2024-06-27 19:08:43,113 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 210 selfloop transitions, 71 changer transitions 0/348 dead transitions. [2024-06-27 19:08:43,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 348 transitions, 5696 flow [2024-06-27 19:08:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:08:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:08:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-27 19:08:43,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-27 19:08:43,114 INFO L175 Difference]: Start difference. First operand has 213 places, 342 transitions, 5171 flow. Second operand 4 states and 118 transitions. [2024-06-27 19:08:43,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 348 transitions, 5696 flow [2024-06-27 19:08:44,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 348 transitions, 5137 flow, removed 185 selfloop flow, removed 10 redundant places. [2024-06-27 19:08:44,273 INFO L231 Difference]: Finished difference. Result has 208 places, 290 transitions, 4184 flow [2024-06-27 19:08:44,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3852, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4184, PETRI_PLACES=208, PETRI_TRANSITIONS=290} [2024-06-27 19:08:44,274 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 157 predicate places. [2024-06-27 19:08:44,274 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 290 transitions, 4184 flow [2024-06-27 19:08:44,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 19:08:44,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:44,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:44,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:08:44,275 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:44,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash 349883464, now seen corresponding path program 1 times [2024-06-27 19:08:44,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:44,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307802766] [2024-06-27 19:08:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:44,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:48,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:48,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307802766] [2024-06-27 19:08:48,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307802766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:48,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:48,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:48,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388245857] [2024-06-27 19:08:48,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:48,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:48,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:48,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:08:48,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 290 transitions, 4184 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:48,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:48,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:08:48,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand